JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Shihai Cao,Haocheng Yang,Cheng Cheng,Jinheng Dai,Shuaishuai Lu,Yao Lu
Photocatalytic technology has been proven to be a simple and effective method for degrading recalcitrant organic pollutants. In this study, a series of Z-scheme heterojunction nanocomposites composed of CeO 2 and terephthalic acid-modified WO 3 was prepared and further used as photocatalysts for perfluorobutane sulfonate (PFBS) degradation. In this design, terephthalic acid was used as an electron recombination center and heterojunction mediator, which effectively enhances the migration ability of electron–hole pairs and the physicochemical stability of the catalyst. In addition, in situ synthesis of CeO 2 onto the WO 3 surface by the coordinate bond between terephthalic acid and Ce ions can avoid CeO 2 agglomeration. As a result, the CeO 2 @WO 3 photocatalyst exhibits excellent PFBS degradation ability (94% for CeO 2 @WO 3 vs. 19% for CeO 2 ). After the fifth cyclic degradation experiment, the CeO 2 @WO 3 photocatalyst still maintains stable degradation efficiency. Furthermore, the reaction mechanism of the PFBS in CeO 2 @WO 3 photocatalytic process was analyzed by free radical trapping experiment and liquid chromatography tandem mass spectrometry (LC-MS) technique. This study provides new insights for constructing Z-scheme heterojunction and demonstrates that CeO 2 @WO 3 photocatalysts possess a promising prospect for degrading PFBS pollutants.
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高影响因子
Advanced Science
·
2024
·
IF 14.3
Yanghai Gui,Jintao Wu,Di Zhao,Kuan Tian,Shuaishuai Zhao,Huishi Guo,Xiaoyun Qin,Xiaomei Qin,Dongjie Guo,Yun Wang
H 2 S gas sensors with facile preparation, low detection limits, and high selectivity are crucial for environmental and human health monitoring. However, it is difficult to maintain a high response of H 2 S gas sensors under high humidity in practical applications. To face this dilemma, a layer-by-layer growth method is applied to in situ prepare a nanostructured Co(CO 3 ) 0.5 (OH)·0.11H 2 O/WO 3 coated by a hydrophobic hierarchical ZIF-67 as the H 2 S sensor. This novel composite exhibits excellent humidity immunity without sacrificing the excellent sensitivity and selectivity of H 2 S. At a low operating temperature of 90 °C, a remarkable response value of 1052.3 to 100 ppm H 2 S has been achieved, which is 779 and 9.36 times higher than that of pure WO 3 and Co(CO 3 ) 0.5 (OH)·0.11H 2 O/WO 3 , respectively. More importantly, an 82.2% relative response value remains at a high humidity of 75%RH. The sensing mechanisms are investigated using gas chromatography-mass spectrometry (GC-MS), which revealed that the reaction products are H 2 O and SO 2 . The high humidity immunity and fast response of the Co(CO 3 ) 0.5 (OH)·0.11H 2 O@ZIF-67/WO 3 demonstrate the layer-by-layer in situ synthesis method holds the potential application for the development of high-performance WO 3 -based H 2 S sensors.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaohui Sun,Qinggang Li,Nana Liu,Bo Wang,Xuyang Zhang,Haining Qian,Yongsheng Lv,Xianhui Rong,Guohua Wu,Xiangwei Wang
The interface mismatch between electrochromic materials and conductive layer seriously affects the cycle stability of electrochromic smart windows (ESW). However, it is difficult to improve the interface matching at the same time because of the different physical and chemical properties of anode and cathode materials . In this work, SnO 2 nanosheets are used as the interface modification layer between electrochromic materials and conductive layer. SnO 2 interface engineering significantly can improve the cycle stability of WO 3 film and Prussian blue (PB) film. The WO 3 /SnO 2 -PB/SnO 2 complementary ESW exhibits a high optical modulation of 60.2 % at 633 nm, fast response time (bleached/colored time = 8.5/2.5 s), and coloration efficiency of 91.7 cm 2 C −1 . The WO 3 /SnO 2 -PB/SnO 2 device can still maintain an optical modulation of 45.2 % after 2000 cycles, suggesting excellent long cycle stability. And the device shows the energy storage of 5.06 mF cm −2 at 0.1 mA cm −2 , which can improve energy efficiency. The excellent electrochromic properties and energy storage suggests that SnO 2 interface engineering has a good application prospect in multi-functional ESW with excellent cycle stability.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Kuan Wang,Tong-Le Dang,Sheng-Li Lv,Xin-Peng Li,Kai-Xiong Dai,Zhen-Hong He,Weitao Wang,Huan Wang,Zhao-Tie Liu
The photo-thermo synergy catalytic cyclohexane oxidation has been identified as an efficient and environmentally friendly approach for the preparation of cyclohexanone and cyclohexanol (KA oil). However, this strategy encountered several challenges that impeded its implementation for the one-step production of adipic acid (AA), highlighting the need for further advancements. Herein, a robust strategy for tailoring multi-channel charge transfer pathways in LaVO 4 /WO 3 @H x V 2 O 5 nanospherical composites was developed by constructing double Z-scheme heterojunctions. The LaVO 4 /WO 3 @H x V 2 O 5 exhibited exceptional photothermal catalytic performance for the cyclohexane oxidation, achieving the cyclohexane conversion of 11.01 % with the total selectivity of 96.38 % (solid product AA of 58.51 % and liquid product KA oil of 37.87 %). The exceptional performance of LaVO 4 /WO 3 @H x V 2 O 5 can be ascribed to the double Z-scheme heterojunctions with multi-channel charge transfer and high redox potentials, which facilitates the efficient separation and transfer of photo-generated electron-hole pairs. This deliberate design of double Z-scheme heterojunctions provides valuable insights into the meticulous construction of efficient pathways with multi-channel charge transfer for the field of photothermal catalysis applications.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiming Huang,Runqing Liu,Hangdao Qin,Fan Wu,Lei Guo,Wei Shi,Ping Xue,Sizhan Wu,Guiying Zhang,Zhengbang Wang
Developing S-scheme photocatalysts with excellent catalytic activity and convenient retrieval is highly desirable for wastewater purification. Herein, a novel S-scheme MIL-101(Fe)/WO 3 heterojunction on carbon cloth is successfully synthesized via a facile solvothermal approach. The optimized MIL-101(Fe)/WO 3 composite (MWC-1.5) has been found to be highly effective in activating peroxymonosulfate (PMS) and then degrading tetracycline hydrochloride (TC-HCl) with a 100% degradation rate when exposed to visible light (Vis) within a period of 20 min. Such MWC-1.5/PMS/Light system also shows stable cycling performance and good recyclability. The remarkable photocatalytic degradation performance is mainly attributed to the powerful intrinsic electric field that accelerates the separation of photogenerated charge carriers via the S-scheme charge transfer. Radical quenching experiments and electron paramagnetic resonance (EPR) results suggest that SO 4 – and OH are the major oxidizing substances in the photocatalytic processes. Three potential degradation pathways are deduced based on an in-depth analysis of the degradation intermediates and the degradation mechanism is also elucidated through a rational combination of the experimental studies and theoretical calculations. This novel hybrid photocatalyst system has been shown to be a promising strategy for environmental remediation, while also suggesting a feasible approach for the development of photocatalysts with both remarkable activity and stability.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Feng Gao,Jingcun Shao,Yanting Tang,Yajie Tian,Lin Sun,Xin Yu
To address the escalating concerns related to organic pollutions in aquatic environments, there is an urgent demand for exploring an efficient and eco-friendly method for the removal of organic pollutants. In this work, porous Cl-C 3 N 4 (ClCN)and step-scheme (S-Scheme) Cl-C 3 N 4 /WO 3 (ClCN/WO 3 ) composites have been designed and fabricated through a facile calcination approach for tetracycline removal under visible-light irradiation. The synthesized S-Scheme ClCN/WO 3 composites exhibited porous structures, though their visible-light absorption was lower compared to the ClCN and C 3 N 4 samples. The surface areas of the ClCN/WO 3 composites can reach 81.43 m 2 g −1 , significantly higher than that of the ClCN and C 3 N 4 samples. These composites also demonstrated prolonged carrier lifetime and improved charge separation efficiency, primarily due to the formation of S-Scheme heterostructures. Among the prepared samples, the ClCN/WO 3 -2 composite demonstrated the highest photocatalytic activity with a rate constant reaching 0.0547 min −1 , approximately 4.56 times that of pristine C 3 N 4 . Additionally, when applied to tetracycline degradation in simulated seawater, the ClCN/WO 3 -2 composite achieved a rate constant of 0.047 min −1 , outperforming the C 3 N 4 and ClCN samples. Mechanistic studies showed that the S-Scheme heterostructures markedly promoted charge separation and tetracycline degradation. Furthermore, the ClCN/WO 3 composites contributed to a reduced the biological toxicity of the degraded intermediates. This study underscores the immense potential of ClCN/WO 3 composites as high-performance photocatalysts for the photodegradation of organic pollutants under visible-light irradiation.
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Chemical Science
·
2025
·
IF 7.4
Yang Sun,Fan Yang,Kexin Wei,Siyuan Sun,Li Sun,Junpu An,Chunhui Yu,Qing Guo,Conghan Zhang,Guang Ma,Hongchen Liu,Yongfeng Li
Constructing an asymmetric charge distribution and built-in electric field (BIEF) has proven to be an effective strategy for enhancing the catalytic performance of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts. Herein, a Mo-doped Ni/WO3 heterojunction catalyst was immobilized on Ni foam for enhancing the performance of the HER and OER. The constructed Ni/WO3 heterointerface facilitates electron transport, while the incorporation of Mo further amplifies charge asymmetry in the interfacial region. The optimized Mo3–Ni/WO3 catalyst exhibits excellent performance, requiring only 13 mV and 328 mV overpotential to reach current densities of 10 and 100 mA cm−2 for the HER and OER, respectively. Besides, it maintains stable overall water splitting performance at 100 mA cm−2 for 90 h. The asymmetric distribution of Ni/WO3 interfacial charge is promoted and electron transport is enhanced by Mo doping. Theoretical results show that element doping in the heterostructure turns W sites into additional adsorption centers, optimizing the energetics of H* adsorption during the HER. Mo doping reduces the work function (φ) of Mo3–Ni/WO3, promoting efficient electron transfer and lowering the energy barrier for intermediate formation, thereby enhancing OER activity. This strategic modulation of charge asymmetry in heterojunction architectures provides a new approach for the rational design of high-performance bifunctional electrocatalysts.
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 18
·185701
·
IF 3.551
Xiaofeng Cui,Yu Zhou,Jian Wu,Shan Ling,Lijun Zhao,Jianli Zhang,Junwei Wang,Wei Qin,Yuanguang Zhang
A solid-state Z-scheme system, with the synergistic integration of the advantages of various narrow-band semiconductors, is considered to be a potential strategy to develop efficient photocatalysts for operation under visible light illumination. However, the charge separation efficiency of these systems has always been reduced by disordered electron transfer between coupling semiconductors. In this work, we constructed a direct Z-scheme system WO3-MoS2-Pt through the loading of WO3 quantum dots onto MoS2 nanosheets and the selective depositing of a Pt co-catalyst onto MoS2. X-ray diffraction, transmission electron microscopy, atomic electron microscopy and x-ray photoelectron spectroscopy, etc were used to confirm the successful preparation of the targeted photocatalyst. This photocatalytic system showed high visible-light-driven H2 evolution activity (802.2 μmol · h−1 · g−1) and good photostability. Control experiment and mechanism analysis suggested that the remarkable performance can be attributed to the heterojunction formed WO3 and MoS2 and the vectorial electron transfer (WO3 → MoS2 → Pt) achieved by selectively loading the Pt co-catalyst.
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Catalysts
·
2020
·Vol. 10
·期 2
·207
·
IF 3.52
Hua Nie,Wei Li,Qirong Wu,Vladislav Rac,Vesna Rakić,Xuesen Du
Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V2O5-WO3/TiO2and V2O5-Ce(SO4)2/TiO2, was investigated. The catalytic activity of the fresh V2O5-WO3/TiO2was higher than that of V2O5-Ce(SO4)2/TiO2at low temperatures. V2O5-Ce(SO4)2/TiO2performed better than V2O5-WO3/TiO2when KCl was deposited on the catalyst surface. Both poisoned catalysts were efficiently regenerated by SO2treatment. The characterization results show that the reducibility and acidity of the catalysts were weakened by KCl deposition but regenerated by SO2.
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 152
·期 12
·3594-3606
·
IF 2.936
Yao Haoyang,Xu Yunlan,Zhong Dengjie,Zeng Yundong,Zhong Nianbing
In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The maximum photocurrent density is 2.31 mA·cm −2 , which is 1.76 times higher than that of WO 3 /TiO 2 /Ti at 1.1 V (vs. SCE). The maximum power density, phontocurrent density and Rhodamine B degradation rate of photocatalytic fuel cell (PFC) with PPy-14%/WO 3 /TiO 2 /Ti photoanode and Cu cathode are 25.48 μW·cm −2 , 0.25 mA·cm −2 and 88.5%, respectively. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively. This not only expands the light absorption range and enhances the light absorption intensity, but also improves the separation of electron–hole pairs, and finally significantly enhances the Rhodamine B degradation and electricity generation performance of PFC. Graphical Abstract In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively.
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MATERIALS LETTERS
·
2017
·
IF 2.572
Jing Huang,Xiaoxia Wang,Yongfeng Gong,Yi Liu,Ping Zhou,Xinkun Suo,Dawei Zeng,Hua Li
WO 3 coatings with tunable micro-nano hybrid structures were fabricated by liquid precursor flame spraying. The coatings consisting of the sole component of monoclinic WO 3 show porous topographical morphology with grains of ∼20 nm and pores of ∼4–8 μm. Assessment of gas sensing performances of the coatings to ozone reveals their optimum operating temperature of 150 °C, and sensor response of 3.9 and 46.7 to ozone concentration of 0.5 ppm and 2.0 ppm respectively. The results shed light on construction of ceramic coatings with tunable hybrid structures by the precursor flame spray technical route for functional applications.
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高影响因子
Nanoscale
·
2026
·
IF 5.2
Mengyao Zhao,Hui Zhao,Siyuan Liu,Yijing Wang,Yingxing Yang,Jinhua Lai,Xiaomei Yu,Songjie Li,Jin You Zheng
To address the practical application challenges of slow response speed and inadequate stability in WO3 electrochromic films, this study fabricated such films using the sol-gel method and systematically investigated the effects of key process parameters, including the aging time of peroxotungstic acid (PTA) sol, spin-coating speed, and annealing temperature, on the films' microstructure, crystal structure, and electrochromic performance. The findings demonstrated that 15 h was the optimal aging time for the PTA sol, effectively optimizing the film formation quality. The ideal spin-coating speed was 2000 rpm, enabling precise regulation of the film thickness and performance. Notably, the amorphous WO3 films annealed at 100°C exhibited outstanding comprehensive electrochromic properties, attributed to their unique three-dimensional disordered polygonal ionic channel structure. Specifically, these films achieved an optical modulation amplitude of 64.4%, a bleaching response time of 1.2 s, a coloring response time of 3.1 s, a coloration efficiency of 42.5 cm2 C-1 , and favorable cyclic stability. In contrast, crystalline WO3 films formed via high-temperature annealing suffer from ion-trapping effects, leading to incomplete bleaching. This work offers effective strategies and a theoretical foundation for the design and preparation of high-performance WO3-based electrochromic films from the dual perspectives of process regulation and structural mechanisms.
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