CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Qiuyue Zheng,Tingting Wang,Xue Ma,Ruibai Ma,Chaobo Huang,Xianfa Zhang,Xiaoli Cheng,Lihua Huo,Zoltán Major,Yingming Xu
Developing reliable and portable sensors for detection of highly toxic mustard gas is extremely important for public security. However, gas sensors based on pristine metal oxide semiconductors often suffer from high working temperature, inferior response, and inadequate detection limit owing to their poor intrinsic conductivity and weak adsorption toward target gases, thereby hindering their wide application. Herein, hierarchical WO 3 -Bi 2 WO 6 heterostructures were fabricated as sensing materials to comprehensively improve their sensing properties to 2-chloroethyl ethyl sulfide (2-CEES, a mustard gas simulant). The optimized sensor based on WO 3 -Bi 2 WO 6 -2 displayed short response time of 1.4 s and high sensing response (R a /R g = 63) to 50 ppm 2-CEES at 133 °C, together with an ultra-low detection limit of 10 ppb. The improvement of WO 3 -Bi 2 WO 6 -2 in sensing properties are synergistically attributed to the amount of heterojunction and surface adsorption sites, which were proved by DFT calculations and a series of characterizations. This work might pave the way for further developing heterostructure-based sensors for 2-CEES detection with superior sensing properties.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
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2018
·Vol. 120
·期 7
·1700415
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IF 2.2
Meizhen Lu,Libo Peng,Qinglong Xie,Yong Nie,Xuejun Liu,Xianghong Lu,Jianbing Ji
At present, the utilization of grease has attracted more and more attention. This article presents a simple method that efficiently cleaves methyl oleate-derived methyl 9,10-epoxystearate ( a ) to give high yields of methyl 9-oxononanoate ( d ) with nonanal ( c ) as co-product. A WO 3 /MCM-41 catalyst is prepared via direct mixed-gel synthesis. The catalyst is tested in the oxidative cleavage of a to produce d which can be used as a polymer precursor or an important feedstock. The effects of WO 3 loading, temperature, time, H 2 O 2 / a molar ratio, catalyst/ a weight ratio, and t -BuOH/ a weight ratio on the a conversion and d yield are examined using single-factor experiments. The optimal reaction conditions are determined by orthogonal experiments. The optimal WO 3 loading, temperature, time, H 2 O 2 / a molar ratio, catalyst/ a weight ratio, and t -BuOH/ a weight ratio are 35%, 80 °C, 20 min, 1.3, 0.04, and 0.5, respectively. Under these conditions, the a conversion and d yield reach 99.4 and 78.4%, respectively. In addition, the catalyst shows no significant decrease in activity after being reused three times. Moreover, the reaction mechanism is studied based on the product distribution over time. Practical Applications : Few studies on methyl 9,10-epoxystearate used as the raw material to give methyl 9-oxononanoate and nonanal are found. Because the ethylene oxide bond is more unstable than the carbon–carbon double bond, the oxidative cleavage of methyl 9,10-epoxystearate is easier than cleavage of methyl oleate that allows the oxidative cleavage to be done under milder conditions. Methyl 9-oxononanoate can be converted to a monomer of high-value polymers and is also an important feedstock in the production of chemicals. The co-product nonanal is a natural spice which can be used in the fragrance industry. The results show that the reaction time is short and methyl 9-oxononanoate yield is high under mild reaction conditions. The method in this study can also be widely used in other oxidative cleavage reactions of epoxides. Methyl 9,10-epoxystearate is used as the raw material to produce methyl 9-oxononanoate with nonanal as co-product using WO 3 /MCM-41 as catalyst and H 2 O 2 as oxidant.
研究领域:
化学工程
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催化材料
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Huizhang Zhao,Jianhui Lv,Xiao Ma,Bin Huang,Lei Han,Xingyu Kang,Dong Wang,Hairui Fang
NO 2 concentration in soil surface is one of the important indicators affecting soil nitrogen cycle. Real-time detection of NO 2 is crucial to optimize the use of nitrogen fertilizer and improve efficiency, which is also a key means to prevent soil acidification and increase crop yield. However, the humidity conditions on the soil surface increase the challenge of real-time detection of NO 2 . Therefore, a composite material of tungsten oxide (WO 3 ) composite tin sulfide (SnS 2 ) with heterogeneous structure was synthesized by one-step hydrothermal method. The composite material is seen to exist in the form of nanosheets. At the optimal working temperature of 210℃, the response of the composite material (WO 3 /SnS 2 (3:10)) with a molar ratio of WO 3 to SnS 2 of 3:10–20 ppm NO 2 is 63.8. The excellent gas sensing performance is attributed to the composition of heterojunction and the increase of deficiency oxygen. In the relative humidity (RH) range of 20–98 %, the response of the WO 3 /SnS 2 (3:10) has a good linearity ( R 2 =0.995). Therefore, the humidity compensation is integrated into the convenient NO 2 detection equipment to ensure that the WO 3 /SnS 2 (3:10) sensor can detect NO 2 stably and accurately under different humidity conditions. The NO 2 real-time detection system uses the OLED to display the humidity value and NO 2 concentration value in real time on the soil surface, and the buzzer as an alarm device for exceeding the concentration threshold (2 ppm NO 2 ), which reminds staff of the need to take action to adjust crop management strategies to improve crop health.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Nano Materials
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2022
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IF 6.14
Zeai Huang,Yaolin Chen,Jundao Wu,Wenwen Xie,Xiaoting He,Minzhi Ma,Kazuhiro Sayama,Ying Zhou
Production of peroxodisulphate (S2O82–) on powdered photocatalysts is a promising way to obtain high-value-added chemicals using solar energy; however, it is still suffering from low efficiency. In the present work, we fabricated bimetallic Au core and Pt shell nanoparticle-loaded WO3 (Au@Pt/WO3) photocatalyst for enhanced production of S2O82–, which is 1.7 times that of Pt nanoparticle-loaded WO3 (Pt/WO3), and was reported to be the best catalyst for S2O82– production. A further study demonstrated that the electronic interaction of Pt was successfully modulated by the core–shell nanoparticle architecture, and the core–shell nanoparticle structure between Au and Pt improved the formation of the surface chemical state of Pt to be metallic Pt, proposed as the active site for oxygen reduction. Besides, the core–shell nanoparticle structure also exposed a large amount of Pt on the surface of the substrate. As a result, Au@Pt/WO3 showed significantly enhanced photocatalytic activity of S2O82– with a quantum efficiency of 5.2% at 420 nm, whereas Pt–Au bimetallic alloy nanoparticle-loaded WO3 with a large amount of surface PtOx and exposed both Au and Pt on the surface showed very low activity. This work provides insights into the bimetallic Pt nanoparticle-loaded WO3 for enhanced photocatalytic activity.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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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
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光催化技术
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2024
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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
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电化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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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
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环境科学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
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2014
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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
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传感器技术
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产品关联
DOI
高影响因子
ACS Catalysis
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2017
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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
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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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
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电化学
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海洋工程
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产品关联
DOI
高影响因子
FUEL
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2024
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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
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产品关联
DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 14
·8567-8574
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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
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）