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Fe-doped vanadium tungsten titanium (V–W–Ti) catalysts were fabricated via an impregnation method. Furthermore, the catalysts were systematically investigated through SEM, BET, XPS, XRD, H2-TPR, NH3-TPD and in situ infrared spectroscopy. On this basis, the catalytic performance of the Fe-doped V–W–Ti catalyst for the simultaneous removal of NOx and toluene was investigated. Test results confirmed that the V–W–Ti catalyst exhibited excellent low-temperature performance with the assistance of a large specific surface area TiO2 carrier and Fe dopant. XPS results confirmed that the doping of Fe increased adsorbed oxygen and high valence vanadium, promoting the activation and adsorption of reactants and thus resulting in a conversion rate of NOx as high as 99.1% at 200 °C. In situ FTIR proved that toluene gas reduced low-temperature NH3-SCR performance via competitive adsorption with SCR gases. At the same time, enhanced oxygen mobility caused by the introduction of Fe promoted the complete oxidation of toluene, increasing the toluene removal rate by 10–20% in the synergistic denitrification and toluene removal process at 200 °C. This work provides a certain research and experimental basis for the investigation of the synergistic removal of NOx and toluene in low-temperature industrial flue gas. [ABSTRACT FROM AUTHOR]

The development of sensory hair cells (HCs) is closely linked to hearing loss. There are still many unidentified genes that may play a crucial role in HC development and function. Glutamine synthetase, Glul, is expressed in sensory hair cells and auditory organs. However, the role of the Glul gene family in the auditory system remains largely unexplored. This study aims to investigate the function of the Glul gene family in the auditory system. The expression patterns of the glul gene family were examined via in situ hybridization in zebrafish embryos. It was revealed that the expression of glula occurred in the otic vesicle, while glulb was expressed in the neuromast. In contrast, glulc did not exhibit any discernible signal. glula loss of function caused abnormal otolith formation and reduced hair cell number in otic vesicles, while glulb knockdown caused a decrease in HC number in both neuromasts and otic vesicles and impaired auditory function. Furthermore, we found that the knockdown of glulb induces apoptosis of hair cells. Transcriptomic analysis of zebrafish with glula and glulb knockdown revealed significant alterations in the expression of many genes associated with auditory organs. The current study sheds light on the requirement of glula and glulb in zebrafish hair cell formation and auditory function. [ABSTRACT FROM AUTHOR]

TiO2 sol was prepared by sol-gel method using tetrabutyl titanate as precursor and acetic acid as catalyst, and then hydrophobically modified TiO2 sol was obtained by reducing its surface energy with γ-methacryloxypropyl trimethoxysilane (KH570), the modified TiO2 sol was sprayed on the surface of the filter media to make it superhydrophobic. The wettability, surface morphology, chemical composition and filtration performance of the filter media before and after modification were analyzed.The results show that the modified coating is uniformly deposited on the surface of the filter media and the fiber surface completely wrapped, and the water contact angle of the modified filter media reaches 156.29°. By testing the filtration performance of the particles with the size of 0.3 μm at the filtration velocity of 0.043-0.127 m/s, it can be seen that the filtration efficiency of the modified filter media is increased by an average of 2.7672% compared with the unmodified filter media, and the filter quality factor is increased by 0.34%, which improves the filtration performance of the filter media. In addition, the hydrophobic filter media still has superhydrophobicity after 50 times of sandpaper abrasion cycles and 30 h acid-base solution immersion. The modified filter media has excellent self-cleaning performance by cleaning the surface of coal powder pollution.

In order to solve the problem of blocking the filter media when bag filters are used to deal with high-humidity dust, hydrophobic surface-modified filter media were prepared. Here we constructed a multi-layer rough structure using TiO2 and SiO2, with polydimethylsiloxane (PDMS) subsequently deposited to reduce its surface energy to prepare stable and robust TiO2–SiO2@PDMS modified superhydrophobic filter media. Through modification of the filter media, its surface was changed from superhydrophilic to superhydrophobic, and the water contact angle reached 158°. For the particles with 0.3 μm, the filtration efficiency and quality factor of the modified filter media are higher than those of the unmodified filter media at a flow velocity of 0.043–0.127 m/s, which improves the filtration performance of the filter media. In addition, the modified filter media has strong durability in harsh environmental conditions (such as mechanical wear, strong acid or alkali solution), and has excellent self-cleaning performance. Therefore, such superhydrophobic filter media have great potential for the application of bag filters in various industrial production processes. Highlights: Superhydrophobic filter media is prepared by TiO2–SiO2@PDMS coating. The filtration efficiency and quality factor of the modified filter media are improved by 4.64% and 0.52% on average compared with the unmodified filter media. The filter media modified by TiO2–SiO2@PDMS has excellent stability and self-cleaning performance. [ABSTRACT FROM AUTHOR]