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With ideal metal utilization efficiency and homogeneous active sites, single atom catalysts (SACs) have attracted extensive attention in heterogeneous catalysis field. The performance of SACs is highly dependent on the local coordination environment of metal single atoms. However, few works reported the effect of surface acidity modification on the performance of SACs such as Pt SACs which have been widely studied nowadays. In this work, a Pt/Al 2 O 3 SAC has been successfully prepared using a bayerite Al(OH) 3 as support through simple IWI method for Pt loading. Through post-modification of Pt/Al 2 O 3 with acidic WO 3 and basic MgO, the surface acidity of Pt/Al 2 O 3 was tuned. Activity of CO oxidation and methanol decomposition on the modified catalysts has been evaluated. It was found that the catalytic performance was highly related to the surface acidity of Pt SACs. Basic MgO modified Pt/Al 2 O 3 performed better in CO oxidation under the reaction condition with H 2 O. Acidic WO 3 modified Pt/Al 2 O 3 showed superior activity in methanol decomposition. Detailed characterization and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) study suggested that the positive H 2 O effect on CO oxidation was due to the mitigated formation of bicarbonate species on Pt/Al 2 O 3 and WO 3 /Pt/Al 2 O 3 catalysts and the promoted desorption of carbonate species from MgO/Pt/Al 2 O 3. The superior methanol decomposition performance on WO 3 /Pt/Al 2 O 3 was owing to its abundant oxygen vacancies and high resistance to carbonate accumulation. This study highlights the importance of surface acidity modulation of Pt SACs in heterogeneous catalysis and suggests that fine-tuning the surface acidity can be an effective strategy in new SACs development. [Display omitted] • Pt single atom catalyst on η-Al 2 O 3 was fabricated based on an Al(OH) 3 support. • MgO/Pt/Al 2 O 3 with basic surface was beneficial for CO oxidation under H 2 O condition. • H 2 O inhibited the adsorption of carbonates on catalysts in CO oxidation. • WO 3 /Pt/Al 2 O 3 with acidic surface was highly active for methanol decomposition. • Oxygen vacancies on catalyst surface were the active sites for methanol adsorption. [ABSTRACT FROM AUTHOR]

Helicobacter pylori infection is associated with a decreased risk of esophageal adenocarcinoma, and the decreasing prevalence of such infection might contribute to the increasing incidence of this tumor. We examined the hypothesis that eradication treatment of H pylori increases the risk of esophageal adenocarcinoma. This population-based multinational cohort, entitled "Nordic Helicobacter Pylori Eradication Project (NordHePEP)," included all adults (≥18 years) receiving H pylori eradication treatment from 1995–2018 in any of the 5 Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden) with follow-up throughout 2019. Data came from national registers. We calculated standardized incidence ratios (SIRs) with 95% confidence intervals (CIs) by dividing the cancer incidence in the exposed cohort by that of the entire Nordic background populations of the corresponding age, sex, calendar period, and country. Analyses were stratified by factors associated with esophageal adenocarcinoma (ie, education, comorbidity, gastroesophageal reflux, and certain medications). Among 661,987 participants who contributed 5,495,552 person-years after eradication treatment (median follow-up, 7.8 years; range, 1–24 years), 550 cases of esophageal adenocarcinoma developed. The overall SIR of esophageal adenocarcinoma was not increased (SIR = 0.89; 95% CI, 0.82–0.97). The SIR did not increase over time after eradication treatment, but rather decreased and was 0.73 (95% CI, 0.61–0.86) at 11–24 years after treatment. There were no major differences in the stratified analyses. The overall SIR of esophageal squamous cell carcinoma, calculated for comparison, showed no association (SIR = 0.99; 95% CI, 0.89–1.11). This absence on an increased risk of esophageal adenocarcinoma after eradication treatment of H pylori suggests eradication is safe from a cancer perspective. [Display omitted] This study showed no increased risk of developing esophageal adenocarcinoma after eradication treatment of the common gastric bacterium Helicobacter pylori , which suggests such treatment is safe from a cancer perspective. [ABSTRACT FROM AUTHOR]

Background & Aims The prognosis for most patients with esophageal adenocarcinoma (EAC) is poor because they present with advanced disease. Models developed to identify patients at risk for EAC and increase early detection have been developed based on data from case–control studies. We analyzed data from a prospective study to identify factors available to clinicians that identify individuals with a high absolute risk of EAC. Methods We collected data from 355,034 individuals (all older than 50 years) without a prior history of cancer enrolled in the UK Biobank prospective cohort study from 2006 through 2010; clinical data were collected through September 2014. We identified demographic, lifestyle, and medical factors, measured at baseline, that associated with development of EAC within 5 years using logistic regression analysis. We used these data to create a model to identify individuals at risk for EAC. Model performance was assessed using area under the receiver operating characteristics curve (AUROC), sensitivity, and specificity analyses. Results Within up to 5 years of follow up, 220 individuals developed EAC. Age, sex, smoking, body mass index, and history of esophageal conditions or treatments identified individuals who developed EAC (AUROC, 0.80; 95% CI, 0.77–0.82). We used these factors to develop a scoring system and identified a point cut off that 104,723 individuals (29.5%), including 170 of the 220 cases with EAC, were above. The scoring system identified individuals who developed EAC with 77.4% sensitivity and 70.5% specificity. The 5-year risk of EAC was 0.16% for individuals with scores above the threshold and 0.02% for individuals with scores below the threshold. Conclusion We combined data on several well-established risk factors that are available to clinicians to develop a system to identify individuals with a higher absolute risk of EAC within 5 years. Studies are needed to evaluate the utility of these factors in a multi-stage, triaged, screening program. [ABSTRACT FROM AUTHOR]

Herein we fabricated the supported single-atom silver catalysts using an in situ molten salt method. The Mn 2 O 3 nanowires supported single-atom silver catalyst (i.e., 0.06 wt% Ag/Mn 2 O 3) exhibited excellent catalytic activity for toluene combustion, with the temperatures required for 50 and 90% of toluene conversions being 170 and 205 °C, respectively, at a space velocity of 40,000 mL/(g h). However, the toluene conversion at 205 °C quickly decreased from 90 to 30% within 2.5 h of on-stream reaction. Based on the various characterization results, we found that there were no aggregation of Ag particles, no change in crystal structure of the Mn 2 O 3 nanowire support, and no carbon deposition on the catalyst surface, and the quick deactivation of 0.06 wt% Ag/Mn 2 O 3 was mainly associated with the low oxygen activation ability. The proper CeO 2 addition to the 0.06 wt% Ag/Mn 2 O 3 catalyst was found to not only improve the catalytic activity but also significantly enhance the stability of the catalyst. Toluene conversion at 195 °C over 0.63 wt% CeO 2 -0.06 wt% Ag/Mn 2 O 3 decreased by only 10% in 50 h of on-stream reaction. Because Ag and CeO 2 particles were highly dispersed on the Mn 2 O 3 nanowire support, the oxygen species formed at the surface oxygen vacancies of CeO 2 could efficiently migrate to the active sites (i.e., the interface of Ag-Mn 2 O 3) and replenish the surface reactive lattice oxygen species. Thus, the present single-atom silver catalyst is an alternative for commercial noble metal catalysts for the removal of VOCs. An in situ molten salt strategy is developed for the convenient preparation of Mn 2 O 3 nanowires-supported single-atom silver catalysts with high activity for toluene oxidation. The significant enhancement in catalytic stability of the ceria-modified single-atom silver catalyst is due to the timely replenishment of the surface reactive lattice oxygen species. Unlabelled Image • Single-atom Ag catalyst is prepared using an in situ molten salt method. • Single-atom Ag catalyst exhibits high catalytic activity for toluene removal. • Ce-doping greatly enhances catalytic stability of single-atom Ag catalyst. • Timely replenishment of surface reactive lattice oxygen species is important. • Single-atom Ag catalyst is an alternative for commercial noble metal catalysts. [ABSTRACT FROM AUTHOR]

Supported 0.05 wt% Pt catalysts, prepared via an in situ molten salt method, show high catalytic activity for acetone removal. Ce-, V-, or W-doping increases the amount of surface acid sites, and then enhances H 2 O-, CO 2 -, and SO 2 -tolerance of 0.05 wt% Pt/TiO 2. The present Pt catalysts might be suitable for oxygenated VOCs removal. • Supported 0.05 wt% Pt catalysts are prepared using an in situ molten salt method. • Supported 0.05 wt% Pt catalysts show high catalytic activity for acetone removal. • Ce-, V-, or W-doping enhance H 2 O-, CO 2 -, and SO 2 -tolerance of 0.05 wt% Pt/TiO 2. • Surface acidity greatly influences SO 2 tolerance of supported 0.05 wt% Pt catalyst. • The present Pt catalysts might be suitable for oxygenated VOCs removal. Volatile organic compounds (VOCs) cause damage to atmospheric environment and human health. Supported noble metal catalysts are widely used to control VOCs emissions. The high cost, and low H 2 O-, CO 2 -, and SO 2 -resistance of such catalysts are worthy to be improved. Herein we fabricated Ce-, V-, or W-doped TiO 2 supported ultralow loading Pt catalysts via the in-situ molten salt method, and evaluated their catalytic performance for acetone (major pollutants in pharmaceutical industry) removal. Under the present reaction conditions, all the catalysts exhibited high catalytic activity and stability for acetone oxidation, with the temperature required 90% acetone conversion being of 245 °C over 0.57 wt% CeO 2 -0.05 wt% Pt/TiO 2. The doping of Ce, V, or W enhanced the H 2 O-, CO 2 -, and SO 2 -tolerance ability of 0.05 wt% Pt/TiO 2. More than 85 %85%, 70%, or 60% of acetone could be removed even in the presence of 20 vol% water vapor, 10 vol% CO 2 , or 100 ppm SO 2 , respectively. The improvement in SO 2 -tolerance ability was due to the inhibition of SO 2 adsorption and oxidation activity as well as Ti(SO 4) 2 or TiOSO 4 formation. Acetone complete oxidation over 0.57 wt% CeO 2 -0.05 wt% Pt/TiO 2 would follow the pathway: adsorbed acetone molecules → acetic acid and formic acid → carbonate species → CO 2 and H 2 O. The present supported Pt catalysts might be suitable for oxygenated VOCs removal. [ABSTRACT FROM AUTHOR]

Selective catalytic reduction (SCR) of NO x with NH 3 has been widely used for the removal of NO x. Because of the inevitable disadvantages of conventional V 2 O 5 -WO 3 (MoO 3)/TiO 2 catalysts such as poor low-temperature SCR activity and toxicity of vanadium, as well as the high-cost and over-strong NH 3 adsorption of zeolite catalysts, the development of efficient and non-toxic metal oxide SCR catalysts is highly demanded. Previously, we have developed an environmentally-benign CeO 2 -SiO 2 mixed-oxide SCR catalyst (CeSi 2), which exhibited superior SO 2 resistance ability. However, the low-temperature SCR activity on CeSi 2 was not that satisfactory. In this work, we proposed a new strategy of Mo doping to improve the low-temperature SCR activity on CeSi 2 , which was very crucial for its practical application. By a simple co-precipitation method, a homogenous Mo-Ce-Si mixed-oxide catalyst was prepared. The Mo doping could significantly enhance the NH 3 -SCR activity on CeSi 2 below 250 °C, and the optimal catalyst was Mo 0.1 CeSi 2 , which could achieve 80% NO x conversion at 200 °C. Mo 0.1 CeSi 2 also exhibited superior N 2 selectivity and resistance to SO 2 /H 2 O poisoning. Via a series of characterizations, it was found that the redox properties and surface acidity on CeSi 2 by Mo doping, which accounted for the enhanced low-temperature NH 3 -SCR activity on Mo 0.1 CeSi 2. The reaction mechanism on Mo 0.1 CeSi 2 was also fully revealed by in situ DRIFTS experiments. This work provided a new insight for the development of efficient low-temperature SCR catalysts with superior SO 2 resistance ability. [Display omitted] • A homogeneous Mo-Ce-Si mixed-oxide catalyst was prepared. • Enhanced low-temperature NH 3 -SCR activity was achieved on Mo doped CeO 2 -SiO 2. • Mo-Ce-Si catalyst exhibited excellent resistance to SO 2 poisoning. • Surface acidity and redox properties of CeO 2 -SiO 2 were promoted by Mo doping. • NH 3 -SCR reaction on Mo-Ce-Si catalyst proceeds through E-R mechanism. [ABSTRACT FROM AUTHOR]

Three-dimensionally ordered mesoporous Cr 2 O 3 ( meso -Cr 2 O 3 ) and its supported Au, Pd, and Au–Pd (0.90 wt% Au/ meso -Cr 2 O 3 , 1.00 wt% Pd/ meso -Cr 2 O 3 , and x Au 1 Pd 2 / meso -Cr 2 O 3 ( x = 0.50–1.95 wt%) catalysts were prepared using the KIT-6-templating and polyvinyl alcohol-protected reduction methods, respectively. Physicochemical properties of the samples were characterized by means of numerous techniques, and their catalytic activities were evaluated for the oxidation of toluene. It is found that the meso -Cr 2 O 3 with a high surface area of 74 m 2 /g was rhombohedral in crystal structure and the noble metal nanoparticles (NPs) with a size of 2.9–3.7 nm were uniformly dispersed on the surface of meso -Cr 2 O 3 . The 1.95Au 1 Pd 2 / meso -Cr 2 O 3 sample performed the best: the T 10% , T 50% , and T 90% (temperatures required for achieving toluene conversions of 10, 50, and 90%) were 87, 145, and 165 °C at a space velocity of 20,000 mL/(g h), respectively, and the apparent activation energy was the lowest (31 kJ/mol) among all of the samples. The effect of moisture on the catalytic activity of the 1.95Au 1 Pd 2 / meso -Cr 2 O 3 sample was also examined. It is concluded that the excellent catalytic performance of 1.95Au 1 Pd 2 / meso -Cr 2 O 3 was associated with its small Au–Pd particle size, high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Au–Pd NPs and meso -Cr 2 O 3 . [ABSTRACT FROM AUTHOR]

An in situ molten salt strategy is developed for the convenient preparation of iron oxide-supported platinum catalysts with high performance for o -xylene elimination. The high catalytic performance of the supported platinum catalysts is due to the improvement in redox ability and o -xylene activation. • Supported Pt catalyst is prepared using an in situ molten salt method. • Supported Pt catalyst exhibits high catalytic activity for o -xylene removal. • Pt loading enhances the redox ability of the supported Pt catalyst. • Pt loading improves the adsorption and activation of o -xylene. • Improvement in redox ability and o -xylene activation benefit high activity. Supported noble metal catalysts are highly effective for eliminating volatile organic compounds (VOCs). A catalyst with less noble metal loading is always desirable. Using a mixture of NaNO 3 and NaF as molten salt, Fe(NO 3) 3 and Pt(NH 3) 4 (NO 3) 2 as metal precursors, x Pt/Fe 2 O 3 catalysts (x = 0–0.3 wt%) were fabricated after calcination at 350 °C for 3 h. At space velocity of 40,000 mL/(g h), 0.22 wt% Pt/Fe 2 O 3 showed the best catalytic activity, and o -xylene could be completely oxidized into CO 2 and H 2 O at 225 °C. Furthermore, 0.22 wt% Pt/Fe 2 O 3 exhibited good stability, and high resistance to water vapor, CO 2 , and SO 2. We deduce that the excellent catalytic performance of 0.22 wt% Pt/Fe 2 O 3 was associated with the high dispersion of the Pt species and good low-temperature reducibility. The possible reaction mechanism of o -xylene oxidation over 0.22 wt% Pt/Fe 2 O 3 involved the adsorption of o -xylene molecules, partial decomposition into small organic intermediates (e.g. maleic anhydride and aliphatic carboxylate species), and total oxidation into CO 2 and H 2 O. Due to the high efficiency, good stability, low cost, and convenient preparation, the present catalysts are promising for the practical removal of VOCs. [ABSTRACT FROM AUTHOR]

Mesoporous manganese oxide (meso-MnO y) and its supported Co, Pt, and Pt x Co catalysts are prepared via the KIT-6-templating and PVA-protected reduction routes, respectively. The excellent catalytic activity of 0.70 wt% Pt 2.42 Co/meso-MnO y is associated with its highly dispersed Pt 2.42 Co alloy NPs, high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Pt 2.42 Co NPs and meso-MnO y. • Pt x Co/meso-MnO y is prepared via the polyvinyl alcohol-protected reduction route. • Pt x Co alloy is formed in each of the Pt x Co/meso-MnO y samples. • 0.70 wt% Pt 2.42 Co/meso-MnO y performs the best for methanol combustion. • Pt x Co alloy, O ads content, reducibility, and metal-support interaction govern activity. The KIT-6-templating and polyvinyl alcohol-protected NaBH 4 reduction methods were adopted to prepare the mesoporous manganese oxide (meso-MnO y) and its supported Co, Pt, and Pt x Co catalysts, respectively. Numerous techniques were used to characterize the physicochemical properties of the materials. Catalytic performance of the samples was evaluated for methanol combustion. All of the samples possessed a three-dimensionally ordered mesoporous structure and a surface area of 94–110 m2/g. The Co, Pt, and Pt x Co nanoparticles (NPs) with an average size of 2.2–3.0 nm were uniformly dispersed on the surface of meso-MnO y. The 0.70 wt% Pt 2.42 Co/meso-MnO y sample performed the best: the T 50% and T 90% (temperatures required for achieving methanol conversions of 50 and 90%, respectively) were 50 and 86 °C at a space velocity of 80,000 mL/(g h). The partial deactivation of the 0.70Pt 2.42 Co/meso-MnO y sample due to water vapor or carbon dioxide introduction was reversible. It is concluded that the excellent catalytic activity of 0.70 wt% Pt 2.42 Co/meso-MnO y was associated with its highly dispersed Pt 2.42 Co alloy NPs, high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Pt 2.42 Co alloy NPs and meso-MnO y. [ABSTRACT FROM AUTHOR]

Graphical abstract The x Co 3 O 4 –MnO 2 (x = 2.6–13.3 wt%) catalysts are prepared using the PMMA-templating, incipient wetness impregnation, and acid treatment methods. It is found that the good catalytic performance of 8.8Co 3 O 4 –MnO 2 is associated with its high O ads species concentration, good low-temperature reducibility, and strong interaction between Co 3 O 4 and MnO 2. Highlights • 3DOM LaMnO 3 is synthesized using the PMMA-templating method. • x Co 3 O 4 –MnO 2 is prepared by treating Co 3 O 4 /3DOM LaMnO 3 with nitric acid. • 8.8Co 3 O 4 –MnO 2 shows the highest catalytic activity for o -xylene combustion. • Activity is governed by O ads content, reducibility, and Co 3 O 4 –MnO 2 interaction. Abstract The x Co 3 O 4 –MnO 2 (x = 2.6, 8.8, and 13.3 wt%) catalysts were prepared using the polymethyl methacrylate microspheres-templating, incipient wetness impregnation, and acid treatment methods. Physicochemical properties of the samples were characterized by means of various techniques. Catalytic performance of the x Co 3 O 4 –MnO 2 samples was evaluated for the combustion of o -xylene. It is shown that the as-prepared samples possessed a cubic crystal structure and a surface area of 51.9–63.9 m2/g. The 8.8Co 3 O 4 –MnO 2 sample possessed the highest adsorbed oxygen species concentration and the best low-temperature reducibility, and hence performing the best: the T 10% , T 50% , and T 90% (temperatures required for achieving o -xylene conversion of 10, 50, and 90%, respectively) were 231, 251, and 273 °C at a space velocity of 100,000 mL/(g h). The apparent activation energies obtained over the x Co 3 O 4 –MnO 2 catalysts for o -xylene combustion were 72–82 kJ/mol. The effects of space velocity, water vapor, and carbon dioxide on the catalytic activity of the 8.8Co 3 O 4 –MnO 2 sample were also examined, and the partial deactivation due to water vapor and carbon dioxide introduction was reversible. It is concluded that the good catalytic performance of 8.8Co 3 O 4 –MnO 2 was associated with its high adsorbed oxygen species concentration, good low-temperature reducibility, and strong interaction between Co 3 O 4 and MnO 2. [ABSTRACT FROM AUTHOR]

Three-dimensionally ordered mesoporous Fe 2 O 3 (meso-Fe 2 O 3 ) and its supported Au, Pd, and Au − Pd alloy ( x AuPd y /meso-Fe 2 O 3 ; x = 0.08–0.72 wt.%; Pd/Au molar ratio ( y ) = 1.48–1.85) photocatalysts have been prepared via the KIT-6-templating and polyvinyl alcohol-protected reduction routes, respectively. Physical properties of the samples were characterized, and their photocatalytic activities were evaluated for the photocatalytic oxidation of acetone in the presence of a small amount of H 2 O 2 under visible-light illumination. It was found that the meso-Fe 2 O 3 was rhombohedral in crystal structure. The as-obtained samples displayed a high surface area of 111.0–140.8 m 2 /g and a bandgap energy of 1.98–2.12 eV. The Au, Pd and/or Au–Pd alloy nanoparticles (NPs) with a size of 3–4 nm were uniformly dispersed on the surface of the meso-Fe 2 O 3 support. The 0.72 wt.% AuPd 1.48 /meso-Fe 2 O 3 sample performed the best in the presence of 0.06 mol/L H 2 O 2 aqueous solution, showing a 100% acetone conversion within 4 hr of visible-light illumination. It was concluded that the good performance of 0.72 wt.% AuPd 1.48 /meso-Fe 2 O 3 for photocatalytic acetone oxidation was associated with its ordered mesoporous structure, high adsorbed oxygen species concentration, plasmonic resonance effect between AuPd 1.48 NPs and meso-Fe 2 O 3 , and effective separation of the photogenerated charge carriers. In addition, the introduction of H 2 O 2 and the involvement of the photo-Fenton process also played important roles in enhancing the photocatalytic activity of 0.72 wt.% AuPd 1.48 /meso-Fe 2 O 3 . [ABSTRACT FROM AUTHOR]

Graphitic carbon nitride and its supported iron oxide ( x wt% Fe 2 O 3 / g -C 3 N 4 , x = 0.1–0.8) photocatalysts were fabricated using the guanidine hydrochloride calcination and incipient wetness impregnation methods, respectively. The x wt% Fe 2 O 3 / g -C 3 N 4 photocatalysts contained a two-dimensional nanosheet structure with high dispersion of Fe 2 O 3 nanoparticles (2–3 nm in size), a surface area of 27–29 m 2 /g, and a bandgap energy of 1.92–2.68 eV. The 0.5 wt% Fe 2 O 3 / g -C 3 N 4 sample showed the highest photocatalytic activity (90% 4-nitrophenol (4-NP) was degraded within 40 min of visible-light illumination). Effects of pH value, H 2 O 2 amount, and initial 4-NP concentration on activity of the typical sample were also examined. It is concluded that the enhanced photocatalytic activity of 0.5 wt% Fe 2 O 3 / g -C 3 N 4 was associated with its unique two-dimensional layered structure, Fe 2 O 3 - g -C 3 N 4 heterojunction, high surface oxygen adsorbed species concentration, and easy transfer and separation of photogenerated charge carriers. [ABSTRACT FROM AUTHOR]

The mortality of lung cancer presents a significant difference between the sexes. A role of hormone therapy (HT) in lung cancer mortality has been suggested, but the evidence is inconclusive. We sought to elucidate this issue with a meta-analysis. We conducted a systematic literature search in both Pubmed and Embase. Studies that reported the association of HT and mortality of lung cancer cases were included. Pooled hazard ratio (HR) was computed as the effect size to reflect the association between HT and lung cancer mortality. In total, 11 studies were included in the meta-analysis. The pooled HR of HT in relation to lung cancer mortality was 0.97 (95% CI 0.83–1.12, I 2 = 59.2%, p = 0.006) in all studies disregarding study design, and it was 0.80 (95% CI: 0.69–0.92, I 2 = 21.4%, p = 0.278) in prospective cohort studies. Results of this meta-analysis were robust, and there was no indication of significant differences in association in small and large studies. We observed a protective role of HT use in lung cancer mortality in pooled prospective cohorts, but not in pooled retrospective cohorts and post hoc analyses of randomized controlled trials. Future studies that address smoking, type and time of HT, menopausal status, and histology are warranted. [ABSTRACT FROM AUTHOR]

Abstract: Three-dimensionally ordered macroporous (3DOM) monoclinic InVO4 and its supported chromia (yCrO x /3DOM InVO4, y denotes as the weight percentage of Cr2O3, y = 5, 10, 15, and 20 wt%) photocatalysts were fabricated using the ascorbic acid-assisted polymethyl methacrylate-templating and incipient wetness impregnation methods, respectively. Physicochemical properties of the materials were characterized by means of a number of analytical techniques. Photocatalytic activities of the samples were evaluated for the degradation of rhodamine B (RhB) in the presence of H2O2 under visible-light illumination. Compared to 3DOM InVO4 and 15CrO x /bulk InVO4, yCrO x /3DOM InVO4 showed much better visible-light-driven photocatalytic performance for RhB degradation, with the 15CrO x /3DOM InVO4 sample performing the best. It is concluded that the CrO x loading, higher surface area and surface oxygen vacancy density and lower bandgap energy as well as the better quality of 3DOM structure were responsible for the good photocatalytic performance of 15CrO x /3DOM InVO4 for the degradation of RhB. [Copyright &y& Elsevier]

Highlights: [•] Chain-like macroporous LaMnO3 is prepared by the PMMA-templating method. [•] xAu/LaMnO3 is prepared by the PVA-protected reduction method. [•] xAu/LaMnO3 possess high surface area and Oads content and good reducibility. [•] xAu/LaMnO3 perform well in the oxidation of CO and toluene. [•] There is a strong interaction between Au and LaMnO3. [Copyright &y& Elsevier]