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Abstract: In this work, V-doped TiO2 nanofibers with different V contents have been fabricated by an electrospinning technique. The as-prepared nanofibers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy (XPS), and UV–Vis diffuse reflectance (DR) spectroscopy. The results indicated that the V4+ or V5+ ions were successfully incorporated into the crystal lattice of anatase TiO2 nanofibers. Meanwhile, the V doping could extend the visible light absorption of TiO2 nanofibers. The photocatalytic experiments indicated that the obtained V-doped TiO2 nanofibers possessed high activity for the photodegradation of organic pollutant methylene blue (MB). Especially, the 1.0 and 5.0wt.% V-doped TiO2 nanofibers exhibited the best catalytic activity under visible and ultraviolet (UV) light irradiation, respectively. Also, these nanofibers could be easily recycled without a decrease of the photocatalytic activity. [Copyright &y& Elsevier]

Amine-functionalization of TiO2 nanoparticles, through a solvothermal approach, substantially increases the affinity of CO2 on TiO2 surfaces through chemisorption. This chemisorption allows for more effective activation of CO2 and charge transfer from excited TiO2, and significantly enhances the photocatalytic rate of CO2 reduction into methane and CO. [ABSTRACT FROM AUTHOR]

The affinity of TiO2 nanoparticles for CO2 is greatly enhanced upon amine functionalization. In their Communication on page 10220 ff., C. Xue and co‐workers show that this enhanced chemisorption is coupled with a higher rate of photocatalytic reduction of CO2 into CH4 and CO. [ABSTRACT FROM AUTHOR]

• TiO 2 /Cu 2 O/CuO CNFs is produced via a photoinduced phase-transition on the TiO 2 /CuO CNFs. • The TiO 2 /Cu 2 O/CuO CNFs exhibited the enhanced sensing property for glucose. • The sensitivity of TiO 2 /Cu 2 O/CuO CNFs depends on the TiO 2 content in the CNFs. • The sensing property of TiO 2 /Cu 2 O/CuO CNFs electrode is recoverable via the light irradiation. • The CNFs electrode possesses a good long-term stability, high anti-interference ability, and good reproducibility. The TiO 2 /Cu 2 O/CuO composite nanofibers (CNFs) were obtained via the photoinduced phase-transition process occurring in the electrospun TiO 2 /CuO CNFs. The TiO 2 /Cu 2 O/CuO CNFs electrode showed the higher sensitivity (2074.7 µA·mM−1·cm−2; 0–2 mM) than the pure CuO NFs, TiO 2 NFs, and TiO 2 / CuO CNFs electrodes, respectively. The enhanced glucose sensing performance is attributed to the existence of multiple valence-states and redox-couples in TiO 2 /Cu 2 O/CuO CNFs to promote the redox reaction. [Display omitted] Constructing metal-oxide-based composites with the multiple valence-states and redox-couples has been proved as an effective strategy to enhance the performance of non-enzymatic glucose sensing. Herein, we report a mild and efficient method to prepare multiple-valent copper-based oxide composite nanofibers (Cu x O CNFs) through introducing the TiO 2 photosensitizer into the CuO NFs for actuating the localized phase transition from tenorite CuO (Cu2+) to cuprite Cu 2 O (Cu+) upon UV–visible light irradiation. The sensitivity of the obtained TiO 2 /Cu 2 O/CuO CNFs for glucose sensing (0–2 mM) could be enhanced by 1.12–1.31 times as compared to that of the TiO 2 /CuO CNFs. The enhanced sensitivity is dependent on the TiO 2 -content in the primal TiO 2 /CuO CNFs. When introducing 5.0 at.% of TiO 2 into the CuO nanofibers, the photoinduced phase-transition process could result in the formation of optimal TiO 2 /Cu 2 O/CuO CNFs with the component ratio of Cu 2 O to CuO at 0.46:1. This TiO 2 /Cu 2 O/CuO CNFs (2074.7 µA·mM−1·cm−2; 0.25 µM) exhibited nearly 1.32-fold improvement on the sensitivity and 3.0-fold enhancement on the detection limit as compared to the corresponding values of the pure CuO electrospun nanofibers (1581 µA·mM−1·cm−2; 0.75 µM). After the continuous measurements for 14 days, the sensitivity of the optimal sample could maintain 89.4% of its initial value. Notably, its sensitivity could be further recovered to 97.4% of the initial value after UV–visible light irradiation for 1 h. [ABSTRACT FROM AUTHOR]

Abstract: One-dimensional 2,9,16,23-tetra-nitrophthalocyanine iron(II) (TNFePc)/TiO2 nanofiber heterostructures have been successfully obtained by a simple combination of electrospinning technique and solvothermal process. The as-obtained products were characterized by field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and IR spectrum. The results revealed that the TNFePc nanosheets were successfully grown on the primary TiO2 nanofibers. And, the coverage density of the secondary TNFePc nanostructures could be controlled by adjusting the experimental parameters. Photocatalytic tests displayed that the H2O2 assisted TNFePc/TiO2 nanofiber heterostructures (TNFePc/TiO2–H2O2) possessed a much higher degradation rate of methyl orange than the pure TiO2 and TNFePc/TiO2 nanofiber without H2O2 under visible light. Moreover, the TNFePc/TiO2 nanofiber heterostructures could be easily recycled without the decrease of the photocatalytic activity due to their one-dimensional nanostructural property of TiO2 nanofibers. [Copyright &y& Elsevier]

Amine-functionalization of TiO2 nanoparticles, through a solvothermal approach, substantially increases the affinity of CO2 on TiO2 surfaces through chemisorption. This chemisorption allows for more effective activation of CO2 and charge transfer from excited TiO2, and significantly enhances the photocatalytic rate of CO2 reduction into methane and CO. [ABSTRACT FROM AUTHOR]