Nanoscale
·
2018
·Vol. 10
·期 16
·7440-7450
·
IF 7.233
Juanjuan Qi,Ke Chen,Yi Xing,Hua Fan,Hewei Zhao,Jie Yang,Lidong Li,Bingyi Yan,Jing Zhou,Lin Guo,Shihe Yang
Currently, the development of semiconducting metal oxide (SMO)-based gas sensors with innovative modification and three-dimensional (3D) structural designs has become a significant scientific interest due to their potential for addressing key technological challenges. Herein, gas sensing devices based on the 3D hierarchical monoclinic-type structural Sb-doped WO3 (HMSW) gas sensing material were successfully constructed by ordered assembly of urchin-like monoclinic-type structural (P2/m) Sb-doped WO2.72 (W18O49) (UMSW) nanocrystals and nanowires. The crystalline microstructure, composition, morphological characteristics, and possible growth mechanisms were systematically investigated. The results of the gas sensor measurements, performed simultaneously on multiple samples, indicated that the 3D HMSW material has superior sensitivity (S = 122) and high selectivity to ppm-level NO2 at 30 °C with a significantly larger response than the best-reported values from other WO3-based gas sensors fabricated so far. All the results clearly demonstrate that the combined effects of abundant structural defects derived from Sb doping modification, reduced band gap, and 3D hierarchical microstructure synergistically play a key role in the NO2 gas sensing performance. Such excellent gas sensing performance foresees the great potential application of 3D hierarchical structural WO3-based sensors for fast and effective detection of toxic gases that can aid in human health and public safety.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
环境健康
·
公共卫生安全
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jianchao Shi,Kaiyuan Zhang,Zhichao Xu,Zinan Xu,Donghong Duan,Xianxian Zhou,Yunfang Wang
Developing a highly efficient and cost-effective catalyst that promotes the hydrogen evolution reaction (HER) is a persistent and significant challenge. This study successfully constructed a WO 3 -modified cobalt phosphide nanoflower-like composite catalyst on nickel foam (CoP@WO 3 /NF) via a simple hydrothermal chemical reaction coupled with a low-temperature phosphidation process, which exhibit exceptional performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). For HER, a current density of 10 mA·cm-2 was achieved at an overpotential of 58 mV, with a corresponding Tafel slope of 73.78 mV·dec −1 . Under identical conditions, the catalyst required 302 mV for OER, accompanied by a Tafel slope of 113.9 mV·dec −1 . Additional evidence from EIS and double-layer capacitance tests confirmed its efficient charge transport and a sizable electrochemically active surface area. These findings present a viable approach for developing the bifunctional electrocatalysts composed of non-noble metals, which are highly applicable for electrochemical water splitting.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangdong Cao,Jihua Tang,Chenchen Xu,Jiaqi Wang,Youfu Geng,Duo Yi,Xuejin Li,Yu Du,Xiaoqing Tian
Triethylamine (TEA) is a kind of flammable and pungent gas, which extensively exists in our daily life. It is paramount important to monitor ppb-level TEA rapidly and selectively at low temperatures. Herein, tungsten oxide hollow microspheres were successfully co-modified by different amount of Pd and N719, and were used to construct semiconductor gas sensor. TEA sensing properties were tested for the N719-Pd/WO 3 and Pd/WO 3 composites under various light illumination conditions. It is exciting to observe that the 0.3 wt% N719-Pd/WO 3 sensor exhibits excellent TEA detectability in terms of ultra-high response (1410, 50 ppm), low operating temperature (100 °C), fast response speed (25 s) and low detection limit (27 ppb) under white light illumination, which are superior to WO 3 sensors loaded with other Pd and N719 concentration as well as upon other light illumination conditions. This excellent sensing performance indicates that the proposed dual-effect improved sensitization by combining noble metal functionalization with visible light excitation offers an effective design for highly sensitive and efficient gas sensors based on wide-band gap semiconductors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Chenlong Zhao,Hao Zhang,Yaoyang Wang,Lihailiang Xu,Yuan Wan,Xianwu Xiu
Noble metal and semiconductor composite substrates possess high sensitivity, excellent stability, and selective enhancement, establishing them as a significant research focus in the field of surface-enhanced Raman scattering (SERS). Tungsten oxide (WO 3 ), as an n-type semiconductor with high thermal stability, corrosion resistance, and outstanding electrochromic properties, has great potential in SERS research. This study designed and fabricated a flexible composite SERS substrate based on oxygen-deficient tungsten oxide nanostructures, achieving optimal detection performance by combining 3D WO 3-x nanowires on carbon cloth (CC) with silver nanoparticles (AgNPs). The high-aspect-ratio WO 3-x nanowires were prepared using a functional group-induced "competitive growth" hydrothermal method. The bandgap was modulated through atmosphere annealing to introduce oxygen vacancies (self-doping), which effectively improved the charge transfer efficiency and surface plasmon resonance, thereby achieving superior SERS performance. This composite SERS substrate benefits from the synergistic contributions of electromagnetic and chemical enhancement mechanisms, achieving ultra-low detection limits of 10 −12 M for Rhodamine 6 G (R6G). Within the concentration range of 10 −7 M to 10 −12 M, there is a good linear relationship between concentration and peak intensity, demonstrating excellent quantitative analysis capabilities. Furthermore, leveraging its mechanical flexibility, this substrate holds broad application prospects in areas such as food safety and environmental monitoring.
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Onome Ejeromedoghene,Olayinka Oderinde,Sheriff Adewuyi,Guodong Fu
Recently, the fabrication of functional and stimuli-responsive hydrogels using deep eutectic solvent derivatives is gaining tremendous scientific recognition owing to their unique self-switching properties. In this study, perfluorinated deep eutectic mixtures were prepared as the template for the synthesis of WO 3 /MoO 3 composites. The metal oxide-based composites were further employed as a chemical crosslinking agent for the polymerization of polyvinyl pyrrolidine (PVP) and acrylamide (Am), for the construction of (PVP-Am)/WO 3 /MoO 3 hydrogel composites. The hydrogels displayed unique morphologies and mechanical properties . The hydrophilic nature of hydrogels as well as the high concentration of dispersed WO 3 /MoO 3 composites in the polymer network contributes to their photochromic activity and allows an immediate coloration upon exposure to light at a short time. Howbeit, the low concentration of the dispersed WO 3 /MoO 3 composites in the dry glass membrane is responsible for the blue coloration and an extended time of photochromic response. In addition, the electrochromic behavior of the hydrogel composites displayed a strong quasi-rectangular shape potential window as well as a well-defined redox cyclic voltammetry curve when exposed to high voltage. This could be due to the photoredox property of the WO 3 /MoO 3 composites responsible for charge transfer between the different oxidation states.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8391-8398
·
IF 3.3
Penghui Li,Huixiang Wang,Junhua Gao,Liancheng Wang,Jing Shi,Yu Meng,Junfen Li,Baoliang Lv
Supported tungsten oxide catalysts are promising candidates for olefin epoxidation with hydrogen peroxide (H2O2). Understanding the structure–activity relationship is of great importance for developing more efficient tungsten oxide-based catalysts. Herein, WO3–SBA-15 with an isolated tetrahedron WO4 is synthesized using a direct incorporation strategy, and its TOF is 191 h−1 in cis-cyclooctene epoxidation with H2O2, which is much higher than that of WO3/SBA-15 (51 h−1) prepared using an impregnation method and that of bulk-WO3 (0.4 h−1). Its lowest apparent activation energy of 34.6 kJ mol−1 also corresponded to the remarkable performance of WO3–SBA-15. Kinetic analysis indicated that WO3–SBA-15 bound H2O2 more strongly than other catalysts, resulting in the facilitated activation of H2O2. By correlating the specific activity and the structure characterization, we considered that the high reactivity of WO3–SBA-15 was attributed to (i) more isolated WO4 sites, which were of benefit to the coordination and activation of H2O2 and (ii) a stronger metal–support interaction derived from isolated WO4 species, which favored the dissociation of an O–O bond in the W–OOH intermediate and contributed to the insertion of an oxygen atom into an olefin double bond. Furthermore, DFT calculations indicated that the isolated tungsten oxide was beneficial for lowering the energy barrier of electrophilic oxygen atom transfer, thereby facilitating epoxidation.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhiming Sun,Yuhang Gao,Chaogang Ban,Jiazhi Meng,Jinshu Wang,Kaiwen Wang,Liyong Gan
Oxygen vacancy (Vo) engineering is a powerful tool to improve semiconductor metal oxide-based surface-enhanced Raman scattering (SERS) activity due to the enriched surface states of substrates. However, the current energy-consuming high-temperature hydrogen reduction methods of introducing Vo and the poor sensitivity impede practical applications of semiconductor SERS. In this work, a facile solvothermal method was developed to prepare ultrafine WO3–x nanorods (∼3 nm width) for high-performance SERS substrates. The lowest detection limit of the rhodamine 6G (R6G) molecule on the Vo substrate can be as low as 10–10 mol/L and exceeds that of unmodified WO3 by more than two orders of magnitude. Experimental and calculated results suggest that the Vo-induced localized surface plasmon resonance (LSPR), diverse vibronic coupling, and enhanced charge transfer synergistically account for this outstanding activity. These findings can provide insights into the rational design of oxygen vacancy-tailored semiconductor SERS substrates.
✓ 已验证
产品关联
DOI
高影响因子
Chemical Physics Impact
·
2022
·
IF 0
Yanke Yu,Mengqiao Geng,Jiahang Li,Jingjing Wang,Desheng Wei,Chi He
Commercial V 2 O 5 -WO 3 /TiO 2 (VWTi) catalysts used in NH 3 -SCR reaction with varied Zn loading were prepared and then effect of SO 2 on Zn-poisoned VWTi catalysts was investigated. Zn could cause the deactivation of VWTi catalysts. Nevertheless, the effect of SO 2 on Zn-poisoned VWTi catalysts varied with Zn loading. For Zn-poisoned catalyst with low content of Zn (1.0 wt.%, ZnL), SO 2 would promote the activity recovery of the catalyst. However, SO 2 had no influence on the Zn-poisoned catalyst with high Zn content (4.0 wt.%, ZnH). The catalyst was characterized by N 2 adsorption-desorption, XRD, XPS, SO 2 -TPD, NH 3 -TPD, H 2 -TPR and in situ DRIFTS. Tri-coordinated sulfate species were formed on ZnL sample in the presence of SO 2 , and the sulfate species could form new Brønsted acid sites, causing the recovery of activity. But ZnSO 4 was appeared and no Brønsted acid sites formed on ZnH sample under SO 2 , thus the activity of ZnH sample changed little.
✓ 已验证
产品关联
DOI
Catalysis Science & Technology
·
2022
·Vol. 13
·期 2
·468-478
·
IF 6.177
Xinyu Lu,Xiaoli Gu
The chemical demand for alkyl phenols (mainly extracted from fossil-derived resources) has been increasingly growing, which has accelerated global energy shortages. Due to the inherent aromaticity of lignin, its effective conversion into alkyl phenols is central to its adoption as a sustainable precursor to produce biochemicals. In this study, catalytic transfer hydrogenation (CTH) of alkali lignin was carried out in a mixed medium (isopropanol/formic acid) at 240 °C for 8 h over a series of bimetallic Ni based catalysts. The acidity and reducibility of the as-prepared catalysts are enhanced via WO3 introduction (to form a WO3–Al2O3 mixed support) and a bimetallic synergistic effect, respectively, leading to improved catalytic activity and selectivity towards alkyl phenols. Different kinds of phenolic compounds (e.g., those with substitutions of methoxyl, alkyl, alkenyl, carbonyl, carboxyl, or hydroxyl groups) were generated over these bimetallic Ni based catalysts with various combinations of Ni + Fe/Zn/Co/Mo/Cu, which was due to their own catalytic promotion of certain reactions (e.g., hydrogenation, deoxygenation, and/or hydrogenolysis). Reaction mechanisms of lignin depolymerization were proposed according to the distribution of phenolic compounds. This work provides a comprehensive investigation on yielding alkyl phenols from lignin CTH over a series of inexpensive bimetallic Ni based catalysts (Ni/(Fe/Zn/Co/Mo/Cu)–WO3/Al2O3), and undertook a catalytic evaluation of the bimetallic synergistic effects on improving the chemical selectivity towards alky phenols, which is beneficial for lignin valorization.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Xiaoli Yang,Zelin Li,Mingyu Guo,Tao Zhao,Xiong Su,Wei Jiang,Guangting Han,Haoxi Ben
One-pot catalytic conversion of cellulose to ethylene glycol (EG) provides an efficient way toward the production of high value-added chemicals from the abundant biomass resource. However, control of product selectivity is a challenge due to the thermal instabilities of cellulose derived sugars. Here, a series of multifunctional NiCu/WO 3 catalysts were prepared and applied to this process. By tuning the metal ratio and WO 3 content, a high EG selectivity of 58.9% was obtained. The selectivity of total diols even reached 83.9%. Besides, the catalyst revealed excellent performance in the conversion of raw biomass. Characterization results showed that the special catalyst structure of WO 3 -wrapped metal particles enabled the reaction to proceed in a well-defined sequence and also facilitated the formation of NiCu-WO x-1 -O(H) interfacial sites. These interfacial sites offered high activity for the C C bond cleavage to produce glycolaldehyde from glucose. An appropriate amount of each active site ensured a well-synergistic effect of C C cleavage and hydrogenation capabilities, thus resulting in the highly selective formation of EG.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Weizhen Cui,Jing Ma,Kezhong Wu,Jing Chen,mingxing Wu
Tungsten trioxide (WO 3 ) loaded on activated charcoal powder (ACP) was sprayed onto ITO conductive glass for using in dye-sensitized solar cells(DSSC). The results showed that the composite electrode of WO 3 @ACP had apparently catalytic activity as a counter electrode for the regeneration of the traditional iodide / triiodide (I - /I 3- ) redox pair. In the dye-sensitized solar cell, the power conversion efficiency on WO 3 @ACP was 5.04%, which was 3.15 times higher than 1.61% on the WO 3 . The followed were the electrical properties test of cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS) and Tafel polarization curve. It was further explained that the catalytic activity of WO 3 @ ACP was obviously affected by the dispersion of WO 3 particles on activated carbon powder.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 28
·2200802
·
IF 6.389
Yan Liu,Yanyan Li,Meiqi Gao,Chenyi Yuan,Yuan Ren,Wenhe Xie,Xuanyu Yang,Yaozu Liao,Yidong Zou,Yonghui Deng
The emerging combination of Internet of Things requires the development of intelligent gas sensor, and semiconductor gas sensors based on metal oxides have been widely applied in industrial production, environmental monitoring, and food safety. Although versatile nanomaterials have been exploited as gas sensitive materials, restricted gas sensing performance including sensitivity, selectivity and stability, is still the fatal problem of practical applications. Herein, inspired by heteratomic doping engineering, unique rare earth erbium (Er)-doped mesoporous tungsten oxide (Er/mWO 3 ) has been synthesized via one-step collaborative coassembly strategy, and Er ion-doped mWO 3 exhibited peculiarly hexagonal mesostructure ( P6 3 /mmc ), tunable specific surface area (58.1–78.3 m 2 g –1 ), uniform mesoporous size and highly crystallized framework with heteroatomic pore wall doping. The introduction of Er can significantly adjust the micro/nano structure and band characteristics, and 1.5 wt% Er-doped mWO 3 displays superior acetone sensing performance, including high response values (107 for 50 ppm), rapid response–recovery dynamics (9/56 s), prominent acetone selectivity, low concentration detection (125 ppb), anti-humidity property and excellent long-term stability. Such an excellent sensing performance is mainly attributed to unique interfaces catalytic sites induced by heteroatom interstitial doping. This finding opens a door for the design of smart gas sensors for environmental monitoring and industrial safety.
✓ 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）