JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shu Wang,Yongxin Jiao,Du Peng,Wenlong Yang,Hui Zhang,Shuang Han
There is growing interest in developing artificial-photosynthesized S-scheme heterostructures in photocatalytic applications. Herein, we proposed a Zn 0.5 Cd 0.5 S/WO 3 S-scheme heterostructure, possessing the trifunctionally catalytic applications of H 2 production in water-splitting, heavy metal photoreduction degradation, and antibiotic photooxidation degradation. We have chosen the optimized component to construct this heterostructure according to the best catalytic performance of Zn 1-x Cd x S solid solutions. These heterojunction composites have been prepared by traditional two-step hydrothermal method, subsequently their heterojunction construction, the photophysical transfer process of photogenerated carriers, and the photocatalytic reaction mechanism have been revealed by systemically characterizations and theoretical simulation calculations. These findings provide new insight into photocatalytic function expansion and the mechanism of photocatalytic activity improvement guided by photophysical processes.
研究领域:
材料科学
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环境科学
·
光催化技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Yu Liu,Longlong Chen,Jiangbin Su,Jinmei Bai,Zuming He
In this study, amorphous WO 3 thin films were deposited on indium-tin oxide substrates using radio frequency magnetron sputtering. Anhydrous ethanol (AE) and propylene carbonate (PC) served as binary solvents, with the WO 3 films evaluated in AE + PC-LiClO 4 electrolytes. By adjusting the volume percentage of AE, the physical properties of the electrolytes were modified to improve the fluidity and wetting behavior. The analysis of several aspects, such as migration of ions, capillary flow of electrolyte and electrochemical reaction rate, highlights the important influence of AE + PC binary solvent in reducing the response time. Notably, WO 3 films in AE + PC-LiClO 4 electrolyte with a 7/8 volume percentage of AE demonstrated exceptional optical modulation (Δ T = 75.7 %) and fast response times ( t c = 6.41 s, t b = 2.29 s), alongside shortened the diffusion path, increased ion diffusion coefficients ( D a =4.4678 × 10 −10 cm 2 /s, D c = 8.2968 × 10 −10 cm 2 /s) and electrochemical active area. Based on these efforts, the feasibility of applying AE + PC binary solvent to WO 3 electrochromic thin films has been confirmed. These results offer valuable insights for the development of efficient electrolytes and their application in electrochromic devices.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
junhai Wang,ruoxuan Peng,Yuan-Hao Zhu,changjun You,yuan Yin,boyi Yang,yitao Si,Jiancheng Zhou
Photothermal catalytic conversion of CO2 with H2O has exhibited improved performance in solar-to-chemical (STC) energy conversion efficiency. However, the limited rate of photocatalytic half reactions has generally hindered the full exploitation of solar energy. To address this issue, we developed a CeO2/WO3 catalyst to facilitate the photoconversion process. Under concentrated light irradiation, the energy conversion efficiency of STC was increased to 0.356 ‰, which is 27.9 times higher that under non-concentrated light irradiation. The product amount of C2H4 increased from 4.36 µmol·g-1·h-1 to 124.21 µmol·g-1·h-1, representing a 27.5-fold increase. This success could be attributed to the photo-thermal synergistic effects which provided the photoexcited carriers with additional kinetic energy. Besides, the abundance of active sites at the heterojunction interfaces shortened the charge transfer distance and facilitated C-C coupling. This research contributes to the efficient and environmentally friendly use of solar energy to drive CO2 conversion with photothermal catalytic systems, and highlights the critical importance of heterojunction interfaces during the photocatalytic reactions.
研究领域:
催化化学
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能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Qingfei Wu,Jing Huang,Hua Li
Porous nanostructured WO 3 coatings were deposited by two routes, solution and suspension plasma spraying. The nanostructural characteristics of the coatings were tunable by adjusting the constituents of the starting liquid precursor and spray parameters. Planar or spherical WO 3 grains with controllable sizes in nano-scale have been fabricated. Complete formation of spherical WO 3 grains was attained during solution plasma spraying. Enhanced heating of the nano-WO 3 particles by augmenting plasma power gave rise to oriented WO 3 grain growth along (0 0 2) plane. The planar WO 3 grains with the dimension of ~50 nm, ~80 nm, and ~700 nm in thickness, width, and length respectively were fabricated by the suspension plasma spraying. The results provide clear insight into potential gas-sensing applications of the porous WO 3 coatings.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
ACS Catalysis
·
2017
·
IF 10.614
Sai Chen,Liang Zeng,Hao Tian,Xinyu Li,Jinlong Gong
Partially oxidizing methane into syngas via a two-step chemical looping scheme is a promising option for methane transformation. Providing the optimum lattice oxygen to selectively produce syngas represents the major challenge for the development of oxygen carrier materials in chemical looping processes. This paper describes the design of WO3-based oxygen carriers as the primary source of lattice oxygen with high melting points and attractive syngas selectivity. To further enhance the lattice oxygen availability and methane conversion capacity, NiO nanoclusters are introduced, considering the doping effect on chemical bonding disruption in both bulk and surface regions. For Ni0.5WOx/Al2O3, the nickel cations incorporated into the bulk of WO3 can strongly weaken the tungsten–oxygen bond strength and increase the availability of lattice oxygen. The surface-grafted nickel species can effectively activate methane molecules and catalyze the partial oxidation reaction. Total methane conversion and syngas yield can be substantially increased by about 2.7-fold in comparison with unmodified WO3/Al2O3. This work demonstrates that the bulk and surface modifications are feasible to tailor the active lattice oxygen of oxygen-carrying materials in chemical looping processes.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jiajia Cai,Yongjun Li,Zhi Zhang,Aobo Cui,Zhengxin Cai,Qian Xie,Jianmin Wang
The low sustainable current density in darkness restricts the advancement of photocathodic protection (PCP) for steels in marine environments. A combination of MoO 3 /WO 3 (Mo/WO 3 ) was proposed as an electron storage system to enhance capacitance and charge/discharge rates. Subsequently, incorporating ZnIn 2 S 4 (ZIS) extended light harvesting and improved photocarrier separation efficiency, resulting in efficient round-the-clock PCP performance. Under illumination, the open circuit potential (OCP) of 10Mo/WO 3 @ZIS coupled with 304SS reaches −0.97 V vs. Ag/AgCl, approximately 600 mV and 140 mV more negative than corrosion potential (E corr ) of 304SS and WO 3 @ZIS coupled 304SS, whth photocurrent density of 134 μA/cm 2 . The excellent PCP performance is attributed to superior photocarrier separation and enhanced light-harvesting capability. Notably, in the dark, the OCP of the coupled system remains ca . 0.4 V below the E corr of 304SS, with an average current density of 30 μA/cm 2 , demonstrating the regulated electron storage capabilities of Mo/WO 3 . Furthermore, capacity and charge/discharge rates correlate with Mo/W ratio and electrolyte species. 10Mo/WO 3 @ZIS exhibits a charge capacity of 2.93 mC, nearly 3 times higher than that of WO 3 @ZIS. The innovative application of MoO 3 and WO 3 proves the potential to regulate the electron storage performance, revealing the factors for photoelectron storage/release.
研究领域:
材料科学
·
电化学
·
海洋工程
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产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuzhou Xia,Jilong Xiao,Jiacheng Zhang,Renkun Huang,Xiaohui Huang,Guiyang Yan,Liuping Zheng
The construction of step-scheme (S-scheme) heterojunction has become an effective strategy for enhancing photocatalytic CO 2 reduction. In this study, a sunflower-like S-scheme WO 3 /ZnIn 2 S 4 heterostructure is fabricated through the in-situ growth of ZnIn 2 S 4 nanosheets on WO 3 hollow sphere, aimed at improving selective CO 2 reduction. The constructed embedding configuration, featuring a WO 3 hollow sphere core and an outer layer of ZnIn 2 S 4 nanosheet, increases the contact interface and establishes a significant built-in electric field, thereby promoting the migration and separation of photogenerated carriers. The confined internal cavity of the three-dimensional (3D) sunflower-like architecture aids in limiting the free diffusion of CO 2 , and enriching CO 2 molecules at the surface of the photocatalyst, consequently enhancing reaction kinetics. Moreover, S vacancies on ZnIn 2 S 4 nanosheets promote the chemisorption and activation of CO 2 . As a result, the optimized evolution rates for CH 4 and CO of 58.7μmol g –1 h −1 and 51.3μmol g –1 h −1 , respectively, are achieved for WO 3 /ZnIn 2 S 4 heterojunction. The corresponding electron selectivity for CH 4 reaches 82.1 %, which is 13 and 1.5 times higher than those of bare WO 3 and ZnIn 2 S 4 , respectively. This provides valuable insights into the design of muti-functionalized S-scheme heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 14
·8567-8574
·
IF 3.108
Jiachun Chai,Shanhui Zhu,Youliang Cen,Jing Guo,Jianguo Wang,Weibin Fan
One-pot hydrogenolysis of cellulose to ethylene glycol (EG) was carried out on WO3-based catalysts combined with Ru/C. To probe the active catalytic site for breaking the C–C bond of cellulose, a series of WO3–ZrO2 (WZr) catalysts were synthesized and systematically characterized with XRD, Raman, UV-Vis, H2-TPR, DRIFS and XPS techniques and N2 physisorption experiment. It was found that the WO3 crystallites became more easily reduced to W5+–OH species with increasing crystallite size or tungsten surface density of the WZr catalyst owing to the decrease of their absorption edge energy (AEE) originating from weakening their interaction with ZrO2 support. This, as a result, gave higher EG yield at higher tungsten surface density. The structure–activity relationship of the WZr catalyst reveals that the active catalytic site for cleaving the C2–C3 bond of the glucose molecule is the W5+–OH species.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yongxiang Wang,Jinming Zeng,Zuohao Zhou,Guocan Shen,Ting Tang,Rizwan Ur Rehman Sagar,Xiaopeng Qi
Constructing a nanostructured electrochromic film and enhancing the bonding strength between the electrochromic film and electrode would effectively improve the charge transport and stability of the electrochromic film. In the present study, nanoporous WO 3 films, including WO 3 films without polydopamine (W-x, x = 2, 3, and 4) and WO 3 films with polydopamine (PW-x, x = 2, 3, and 4), were built using a low-temperature hydrothermal method. The PW-x films showed significantly improved electrochromic cycle stability compared to the W-x films because the bonding strength between the ITO glass electrode and the WO 3 film was enhanced by polydopamine (PDA) film. Notably, the PW-2 film still retained 90.8% of its original optical contrast after 5000 cycles. In addition, both the W-2 and PW-2 films exhibited high optical contrast from visible to infrared regions owing to their 3D network nanoporous structure; their optical contrasts were 71.5% and 69.7% at 700 nm, respectively. Both the W-2 and PW-2 films also exhibited high coloration efficiency and areal capacitance; their coloration efficiencies were 80.4 and 72.5 cm 2 /C, and areal capacitances were 59.38 and 75.32 mF/cm 2 , respectively. PW-2 film is promising for electrochromic energy-saving smart windows with power storage.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Xin Liu,Junzhe Jiang,Yushuai Jia,Jinmin Qiu,Tonglin Xia,Yuhong Zhang,Yuqin Li,Xiangshu Chen
The efficient treatment of dye wastewater has been a hot topic of environment field. The integration of adsorption and photocatalytic degradation via fabrication of bi-component heterojunction photocatalyst is considered as a facile and effective strategy to enhance the dye elimination efficiency. In this report, a Z-scheme heterojunction material, SrTiO 3 (La,Cr)/WO 3 with bifunction of adsorption and photocatalysis was successfully synthesized for efficient removal of methylene blue (MB) under visible light irradiation. The morphology and microstructure characterization demonstrates that the SrTiO 3 (La,Cr) nanoparticles are uniformly decorated on the WO 3 nanosheets, forming an intimate heterojunction interface. MB degradation results indicate that the removal efficiency by the synergistic adsorption-photocatalysis process is greatly improved compared to pure WO 3 and SrTiO 3 (La,Cr) with the adsorption and photocatalytic activity closely related to the composition of the material. The possible mechanism for the enhanced photocatalytic activity could be ascribed to the formation of a Z-scheme heterojunction system based on active species trapping experiments. Furthermore, the investigations of adsorption kinetics and isotherm show that the adsorption process follows pseudo-second-order kinetic model and Langmuir isotherm, respectively. Due to the synergistic advantages of negative zeta potential, large surface area and accelerated separation of photogenerated carriers driven by Z-scheme heterojunction, SrTiO 3 (La,Cr)/WO 3 exhibits excellent adsorption-photocatalytic performance and stability on MB removal, which could be potentially used for practical wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 19
·期 3
·682-691
·
IF 8.506
Naixu Li,Yu Zheng,Lingfei Wei,Hongcheng Teng,Jiancheng Zhou
Although the conversion of cellulose to polyols is currently well-developed, the production of the considerably valuable ethylene glycol (EG) is still challenging. Reactions have long relied on the design of suitable catalysts to obtain a high selectivity and yield of EG. Herein, using well-shaped rectangular tungsten trioxide nanosheets as the substrate, we investigated the catalytic performances of various metal supported catalysts for the convertion of cellulose to EG. Results show that Ru/WO3 is more favorable for EG production, with the highest EG yield of 76.3% over the 1% Ru/WO3 nanosheet catalyst. Our characterizations and activity tests suggest that the embedding of Ru nanoparticles onto the WO3 nanosheets produces more W5+ active sites under the same reduction conditions (NaBH4 or H2), which act as Lewis base sites to promote the glucose retro-aldol condensation reaction. Moreover, the Ru/WO3 catalyst holds a portion of Ru in the form of amorphous RuOxδ+ phases, which could further increase the H+ released into an aqueous solution for cellulose hydrogenolysis. A possible catalytic mechanism for this hydrogenolysis process is accordingly proposed.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS SURVEYS FROM ASIA
·
2023
·Vol. 27
·期 4
·406-414
·
IF 3
Han Yujun,Shi Yinteng,Wang Dandan,Zhou Hantao,Chen Jixiang
Ni/ZrO 2 (Ni/Zr) and Ni/WO 3 -ZrO 2 (Ni/ x WZr, x denotes WO 3 /ZrO 2 mass ratios) were prepared by the impregnation-direct reduction method and tested for the aqueous phase hydrogenation of phenol to cyclohexanone in an autoclave reactor. It has been found that the Ni-W alloy forms in Ni/ x WZr, and a charge transfer occurs from Ni to W. The presence of W species promotes the Ni dispersion and increases the amounts of acid sites and spilt-over hydrogen species. This leads to higher hydrogenation and direct deoxygenation activity of Ni/ x WZr than that of Ni/Zr. In addition, the W 6+ and W 4+ species, acted as Lewis acidic sites, may stabilize cyclohexanone and the hydrogenation of cyclohexanone to cyclohexanol is inhibited. Under suitable condition, the phenol conversion and the cyclohexanone selectivity reach 93.1 and 90.6% on Ni/0.8WZr, respectively.
研究领域:
催化
·
化学反应工程
·
有机化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）