CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Hai Liu,Guoying Tan,Mengxuan Li,Zhuang Zhang,Marshet Getaye Sendeku,Yaping Li,Yun Kuang,Xiaoming Sun
Hydrogen evolution reaction is an important half-cell reaction in electrocatalytic water splitting process, which is an efficient way to store renewable energy into hydrogen fuel. However, grid scale water splitting always require high current densities up to amperes per square centimeter, which results change in local pH on the electrode surface, leading to instability risk of cathodic catalyst. Herein, a single atomic Ru doped WO 3 catalyst was fabricated, which exhibit excellent hydrogen evolution reaction (HER) activity with only 28.0, 17.6, and 83.0 mV in acidic, alkaline, and neutral media respectively as well as robust stability for 100 h at ampere-level current density is reported. Synchrotron radiation and density functional theory (DFT) calculations revealed that the defective oxygen and strong electron transfer from W sites to Ru not only achieved moderate H adsorption but also protected Ru sites from agglomeration, leading to superior HER activity and stability at industrial current density.
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Defence Technology
·
2022
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IF 4.035
Xiaogang Guo,Taotao Liang,Junfeng Guo,Huisheng Huang,Shuying Kong,Jianwei Shi,Binfang Yuan,Qi Sun
For solving the dilemma of the short exothermic life-span of WO 3 based metastable interstitial composites (MICs) with extensive application prospect, this paper has firstly designed the promising anti-wetting Al/WO 3 MICs via electrophoresis assembly of nano-Al and WO 3 particles fabricated by hydrothermal synthesis method, followed by the subsequent fluorination treatment. A combination of X ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FT-IR) techniques were utilized in order to characterize the crystal structure, microstructure, and elemental composition distribution of target films after different natural exposure tests. The product with uniform distribution and high purity possesses a high contact angle of ∼170° and a minute sliding angle of ∼1°, and displays the outstanding anti-wetting property using droplets with different surface tensions. It also shows great moisture stability in high relative-humidity circumstances after one year of the natural exposure experiment. Notably, the heat output of a fresh sample can reach up to 2.3 kJ/g and retain 96% after the whole exposure test, showing outstanding thermo-stability for at least one year. This work further proposed the mechanism of anti-wetting Al/WO 3 MICs considering the variation tendency of their DSC curve, providing a valuable theoretical reference for designing other self-protected MICs with a long exothermic life-span applied in wide fields of national defense, military industry, etc.
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CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Haolin Xie,Yongxiang Wang,Haitao Liu,Hengyu Wang,Yinghan Li,Xiaopeng Qi,Tongxiang Liang,Jinming Zeng
Electrochromic materials (ECMs) have received attention owing to its huge potential applications, such as smart dimming windows, static displays, and electrochromic capacitors. High optical contrast and long cyclic life of ECMs are extremely critical for practical applications. In this work, the WO 3 and rare earth Sm-doped WO 3 (WSm x , x = 2.0, 3.0, 4.0, 5.0) films were constructed by hydrothermal system, and then their morphology and electrochromic performance were explored. The morphology of the WO 3 film was transformed from an urchin-like to a nest-like porous structure by adding 4.0%Sm into the hydrothermal system. In comparison with the WO 3 film, the WSm4.0 film displayed higher optical contrast and cyclic life, which was resulting from its crystalline and amorphous mix phases, and nest-like porous structure with high Li + diffusion coefficient and strong structure stability. The optical contrasts of the WO 3 and WSm4.0 films were 57.9% and 61.4% at 633 nm wavelength, respectively. Furthermore, WSm4.0 film exhibited optical contrast of around 70% range from 700 to 1100 nm wavelength. Remarkably, WSm4.0 film still retained 91.7% and 73.6% of primitive optical contrast after 6000 and 10000 cycles, respectively. The nest-like porous WSm4.0 film are promising for assembling electrochromic smart windows with long cyclic life and high optical contrast.
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Water
·
2022
·Vol. 14
·期 16
·2569
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IF 3.53
Weifan Gao,Guichang Zhang,Xiaoping Zhang,Shaoqi Zhou,Zihao Wang
The catalytic capability of original carbon nitride (CN) is limited by a small specific surface area and high electron–hole recombination rate. In this study, WO3-loaded porous carbon nanosheets (MCA-CN/WO3) were synthesized by thermal treatment with melamine, cyanuric acid and WCl6. The MCA-CN/WO3could degrade 98% of the methylene blue (MB) within 30 min in the photo-Fenton-like process, displaying better catalytic activity than the original CN (30%), pure MCA-CN (63%) and original CN/WO3(87%). The results of photoluminescence and electrochemical impedance spectroscopy demonstrated that the Z-scheme heterojunction of MCA-CN/WO3inhibited the recombination of electrons and holes. In addition, the porous nanosheet structure accelerated the electron transfer and provided abundant active sites for MB degradation. A radical quenching experiment indicated that the Z-scheme heterojunction facilitated the decomposition of H2O2to produce1O2for MB degradation. The possible degradation pathways of MB were proposed.Keywords:photo-Fenton-like process;WO3-loaded porous carbon nitride nanosheet;Z-scheme heterojunction;MB degradation
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FUEL
·
2022
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IF 8.035
Yiqing Zeng,Weilong Rong,Shule Zhang,Yanan Wang,Qin Zhong
Ammonia selective catalytic reduction (NH 3 -SCR) technique for nitrogen oxide (NO x ) elimination of low temperature flue gas (<200 °C) requires huge energy consumption and operation costs. In this work, a CuO modified V 2 O 5 -WO 3 /TiO 2 (Cu/VWTi) catalyst are constructed to achieve the aim of enhancing the temperature of flue gas via using the heat released by CO oxidation, thereby promoting the NH 3 -SCR of NO x reaction. Benefiting from the synergistic effect between CuO and VWTi in the adsorption and activation of reactants, Cu/VWTi catalyst shows high NO x (>90%) and CO (>90%) removal efficiency at the temperature range of 225–270 °C and a GHSV of 40,000 h −1 . Moreover, it is found that the completely oxidation of 2000 ppm CO can increase the flue gas temperature by about 20 °C. Therefore, developing catalyst that can achieve simultaneously NH 3 -SCR of NO x and CO oxidation is a feasible method to deduce the energy consumption and operation costs of NH 3 -SCR of NO x system in low temperature flue gas. Finally, the reaction process and SO 2 deactivation effect over Cu/VWTi catalyst was studied via in-situ DRIFT. This work might provide some guidance for the design of catalysts to eliminate multiple pollutants.
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Journal of Water Process Engineering
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2022
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IF 7.34
Bin Qi,Tiantian Chen,Zhifeng Liu,Jinqiu Qi,Qi Wang,Wenming Zhang,Xiaochen Li
To overcome the shortcomings of separation and recovery difficulties of powdered catalysts in practical applications, a novel flexible catalyst film (2D-WO 3 /CA) was formed by combining 2D-WO 3 with cellulose acetate (CA), and successfully applied in degrading organic pollutants in water under real solar irradiation. The structure, morphology and optical properties of the new photocatalytic film were characterized by using X-ray diffraction, scanning electron microscope and UV–vis diffuse reflectance spectra technology , respectively. The results showed that the absorption edges of 2D-WO 3 /CA film shifted remarkably to the longer wavelength compared with 2D-WO 3 , indicating that 2D-WO 3 /CA film could broaden the spectral response range. Furthermore, the photocatalytic capacity of the film was explored by degrading methylene blue (MB) in aquatic solution under real sunlight in the continuous baffled photo-reactor (CBPR). The film exhibited excellent degrading properties with an average removal rate of 85% for MB, and the processing load corresponded to 478.13 mg/(m 2 ·d). The film still had high activity and flexibility after treating wastewater for seven consecutive days. Therefore, the new 2D-WO 3 /CA film is promising in actual dye wastewater treatment . Based on the above analysis, MB degradation mechanism in the photocatalytic system with 2D-WO 3 /CA film was proposed finally.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Cheng Zhao,Jiabin Shen,Shanshan Xu,Jing Wei,Haiquan Liu,Siqi Xie,Yingjie Pan,Yong Zhao,Yongheng Zhu
Trimethylamine (TMA) is an organic amine gas used as an important index to assess the seafood freshness. In this work, an ultra-efficient trimethylamine gas sensor was constructed by ultrasonic treatment loading of Au nanoparticles (∼4 nm) on WO 3 nanosheets prepared by solvothermal self-assembly method. The response of the sensor to 25 ppm TMA was as high as 217.72 (R air /R gas ) at 300 ℃. In addition, the Au/WO 3 nanosheets sensor exhibited rapid response-recovery time (8 s/6 s), low detection limit (0.5 ppm), and high selective detection of TMA. Moreover, the composition of volatiles produced by decay of Larimichthys crocea (0–15 days) was examined, which proved that the detection of TMA by the Au/WO 3 sensor can evaluate the freshness of Larimichthys crocea . Such a magnificent gas sensing performance reveals that the Au/WO 3 sensor has remarkable application potential in rapid and non-destructive seafood freshness assessment on the spot.
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PubMed
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Kuan Wang,Song-Song Li,Junlei Wang,Zhen-Hong He,Dan Wang,Rong-Rong Zhang,Weitao Wang,Yang Yang,Zhao-Tie Liu
Photothermal oxidation of cyclohexane with molecular oxygen in solvent-free is considered to be an efficient approach for the formation of cyclohexanone and cyclohexanol (KA oil), and possesses the potential to generate the next stage product of adipic acid (AA) by one-pot oxidation in chemical industry. Herein, a unique type of Co 8 La 1 O x /WO 3 Z-scheme nanocomposites with p-n heterojunction was successfully constructed by a facile process of solvothermal reaction in conjunction with the simple impregnation method. The Co 8 La 1 O x /WO 3 Z-scheme heterojunction nanocomposites achieved an excellent catalytic performance for the photothermal oxidation of cyclohexane at 120 ℃ under visible light in solvent-free conditions. Surprisingly, 10.35% conversion of cyclohexane with 98.75% selectivity of KA oil (liquid, 80.97%) and AA (solid, 17.78%) was achieved during the reaction time of 3 h. Moreover, the desirable durability and stability of the Co 8 La 1 O x /WO 3 composites demonstrated a potential application as an industrial catalyst. The outstanding catalytic performance of the Co 8 La 1 O x /WO 3 composites could be ascribed to the enhanced electron excitation capacity, the accelerated electron-hole separation and migration, the inhibited charge recombination, the strong visible-light absorption, and the efficient synergetic catalytic effect of photo-thermo. Besides, high oxygen adsorption capacity and large specific surface area of the Co 8 La 1 O x /WO 3 composites can efficiently build a bridge between cyclohexane and O 2 to fully utilize the oxygen participation in the oxidation. The present approach provides a promising perspective for the designing and constructing of Z-scheme heterojunction catalyst with a high-efficiency photo-thermo catalytic performance in the oxidation of cyclohexane to KA oil and AA in chemical industry.
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ACS Applied Nano Materials
·
2022
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IF 6.14
Dayong He,Chao Wang,Rui Zhao,Xiaofeng Lu,Mei Yang,Ju Qiu,Kaizhong Wang,Ce Wang
Facing high-energy radiation exposure in many different situations, researchers are focused on developing personal protective equipment against high-energy rays. The design and fabrication of low-density, self-standing, nontoxic, and flexible high-energy ray shielding materials have always been a hot issue in the special equipment manufacturing industry. As key raw materials for high-efficiency X-ray shielding, high-Z element compounds are nonrenewable resources. Therefore, their development and application require far-sighted arrangement. In this work, we demonstrate an easy and general fabrication route of multifunctional high-Z element compounds/polymer nanofibrous membranes through electrospinning and subsequent solvothermal and successive ionic layer adsorption and reaction processes. The as-fabricated BiOX (X = Cl, Br, I)/WO3/PAN nanofibrous membrane exhibits an excellent X-ray shielding capability with a mass attenuation coefficient of 3.55 cm2 g–1 at 83 keV and could achieve a balanced shielding performance by the introduction of inexpensive iodine elements. Additionally, the self-standing hybrid nanofibrous membrane also exhibits remarkable visible-light photocatalytic activities to degrade RhB in aqueous solution, showing potential in water treatment application and providing an efficient and economical route for the development, usage, recycling, and reuse of precious high-Z material-based composites.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 12
·51815
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IF 3.125
Onome Ejeromedoghene,Yi Ping Hu,Olayinka Oderinde,Fang Yao,Caroline Akinremi,Richard Akinyeye,Sheriff Adewuyi,Guodong Fu
There have been numerous challenges in the incorporation of photochromic materials into hydrogel system due to the agglomeration of nanoparticles and non-transparency of the hydrogel material. In this study, WO 3 nanocomposites were prepared and incorporated into poly(hydroxyethyl acrylate) (pHEA) and polyacrylamide (pAAm) to fabricate poly(HEA-AAm)/WO 3 hydrogels with improved coloration efficiency and reversibility. The as-prepared p(HEA-AAm)/WO 3 hydrogel displayed remarkable mechanical properties to sustain compressive and tensile stress up to 15.9 and 58.7 MPa with deformation ratios of 16.2 and 30.8, respectively. The hydrogels exhibited good transmittance (%T) and reflectance (%R) of ~47% and 64% at 829 and 408 nm respectively. The hydrogels also revealed visible spectroscopic absorbance at >781 nm after exposure to UV-lamp and natural sunlight for 5 s and 0.5 h, giving rise to a blue coloration, however, the fading process of the hydrogels was achieved in 20 min and 2.0 h respectively in an open air. More so, the hydrogel solutions displayed a high antibacterial efficacy against bacteria pathogens associated with bacterial keratitis in contact lens care solutions. The observed excellent photochromic and antibacterial properties of the hydrogel show promising potentials for use in the construction of antibacterial contact lenses, optical and intelligent devices.
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MICROCHEMICAL JOURNAL
·
2026
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IF 5.2
Xueying Song,Xiaohao Zhang,Xunwen Su,Xiao Liang,Yangcan Lv,Jiawen Xu,Na Yi
Tunable WO₃ microstructures are achieved via solvothermal synthesis. • Ultra-fast response (1 s) and low detection limit (52 ppb) toward xylene. • Synergistic mechanism of size effect, active facets and oxygen vacancies. • Low-power indoor xylene real-time monitoring prototype. As a common indoor aromatic volatile organic pollutant, accurate and sensitive monitoring of xylene is essential for residential health protection. In this work, monoclinic WO 3 materials with tunable microstructures were synthesized via a solvothermal synthesis by adjusting the water/ethanol solvent ratio. The regulation effect of solvent composition on crystal facet exposure, defect content and morphology of the materials was systematically analyzed. The gas sensing measurements reveal that the hierarchical flower-like WO 3 microsphere sensor (synthesized at water/ethanol = 2:1) exhibits a response of 25.9 toward 100 ppm xylene at 220 °C, which is 3-fold higher than that of the sensor fabricated with pure water as the solvent. It also features 1 s ultrafast response, excellent selectivity, 30-day long-term stability, and a 52 ppb detection limit. The superior performance originates from the combined contributions of the nanosheet size effect, efficient gas diffusion pathways of the hierarchical architecture, and abundant surface active sites. The portable early warning system developed with this material enables real-time indoor xylene monitoring, providing a new strategy for high-performance gas sensing material design. The WO 3 -2 sensor exhibits an ultrafast response of 1 s and a recovery time of 47 s toward xylene, with a response of 4.5 at 1 ppm and a calculated limit of detection (LOD) as low as 52 ppb. The xylene detection prototype developed based on this sensor enables real-time concentration monitoring and multi-gradient alarm of target gas in indoor scenarios, providing a practical solution for on-site xylene detection in confined spaces such as homes. Download: Download high-res image (99KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zexu Chi,Jingyun Zhao,Yi Zhang,Han Yu,Hongbing Yu
Morphology and facet engineering have been proved efficient strategies to prepare high-performance photoelectrochemical (PEC) materials. WO 3 /BiVO 4 heterojunction photoanodes with different morphologies were prepared by simply controlling the amount of electrodeposited charge. The coral-like WO 3 /BiVO 4 photoanode with the orientation growth of {110} and {011} active facets of BiVO 4 exhibited the optimal PEC performance due to significantly enhanced separation and transfer of photogenerated charge carriers, while the exposure of {−121} facets showed negative effects. 4.71 mA·cm −2 and 2.9 mA·cm −2 of photocurrent densities were obtained for sulfite and water oxidation , respectively, superior to most reported results. Subsequently, a photoelectrochemical-chlorine (PEC-Cl) system was constructed for antibiotic wastewater detoxification with hydrogen recovery. The analysis results indicated that the system can quickly and effectively remove sulfamethoxazole and reduce its toxicity concurrent with high hydrogen yield. The reactive chlorine species (RCS), especially Cl 2 · − and ClO·, dominated the sulfamethoxazole removal. Possible degradation pathways of sulfamethoxazole were also elucidated.
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危险品化学品经营许可证（带存储）