NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 22
·13968-13973
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IF 3.269
Bing Zhang,Xuehua Yin,Deshuai Zhen,Wenhong Gu,Yingju Liu,Qingyun Cai
A metal–semiconductor heterojunction material was synthesized by electrodepositing Au nanoparticles onto the surface of WO3 nanoflowers that were grown on TiO2 nanotubes and applied, for the first time, to the surface-enhanced Raman scattering (SERS) detection of dyes. Owing to their nanoflower structure, a localized surface plasmon resonance was generated on the surface of the Au/WO3/TiO2 nanosheets, which brings about multiple enhanced three-dimensional electromagnetic fields. An enhanced factor of 3.6 × 106 was achieved. The spot-to-spot change in the SERS intensity was less than 15% and the SERS substrate could be preserved for at least 50 days. The analysis of dyes in real samples provided a recovery rate of 94.33–115.6%, indicating its potential applications in environmental analysis.
研究领域:
材料科学
·
环境分析
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Junyu Zhao,Qiang Zhang,Jingying Huang,Haoyu Zhang,Chunyu Chi,Penghui Xie,Hongshun Hao,Shuang Yan
The intrinsic property of WO 3 determines that it has stronger interaction with triethylamine (TEA), which makes the WO 3 sensing material to be an ideal TEA detector. In order to further improve the sensing performance of WO 3 gas sensors, a novel synthesis and modification method was proposed to fabricate Mn-doped WO 3 nanostructure. The unique structure of Mn/WO 3 was assembled by ultrathin nanosheets into hierarchical hollow fibers. Compared with the pristine WO 3 with similar structure, the Mn/WO 3 gas sensor shows greatly enhanced TEA sensing properties. The improvement of gas sensing performance of Mn/WO 3 should be due to the increase of oxygen vacancies and surface adsorbed oxygen after doping of Mn. Under the optimized preparing conditions, the Mn/WO 3 -500 sensor exhibits high sensing response (32 towards 50 ppm TEA), excellent selectivity, fast response-recovery speed and reliable repeatability and long-term stability at its optimal working temperature of 200 ℃. The superior TEA sensing performance of the Mn/WO 3 -500 sensor opens the door for potential applications in TEA recognition and detection.
研究领域:
材料科学
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化学传感
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 16
·12629-12644
·
IF 4.6
Yinqi Yang,Guoshuai Ma,Xiaoli Hu,Wei Wang,Zhonglin Du,Yao Wang,Xue-zhong Gong,Haoyu Tan,Fengxiang Guo,Jianguo Tang
In the context of sustainable development, the utilization of semiconductor materials for the degradation of dyes, antibiotics, heavy metals, and pesticides in wastewater under visible light has emerged as a focal point of contemporary research. In this investigation, a WO3@TiO2 composite was synthesized via a solvothermal method, with the composite exhibiting a molar ratio of 5% WO3 to TiO2 precursors demonstrating optimal photocatalytic degradation performance. This material achieved complete degradation of 20 mg per L Rhodamine B (RhB) dye and tetracycline (TC) antibiotic within 30 min. Furthermore, the effects of initial pollutant concentration and solution pH on catalytic efficacy were systematically explored. The findings revealed that at RhB concentrations below 40 mg L−1, the degradation proceeded at an accelerated rate, with a rate constant exceeding 0.128 min−1. The catalyst exhibited robust performance across a broad pH range, attaining peak degradation efficiency at pH ≈ 3. The exceptional photocatalytic prowess of the WO3@TiO2 composite is predominantly attributable to its distinctive hollow microstructure, the intimate interfacial synergy between WO3 and TiO2, and the efficient separation of photogenerated electrons and holes facilitated by the type-II heterojunction architecture.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Wei Li,Xuesen Du,Zhi Li,Yaqin Tao,Jingyu Xue,Yanrong Chen,Zhongqing Yang,Jingyu Ran,Vladislav Rac,Vesna Rakić
Vanadia-based catalysts are widely used in selective catalytic reduction (SCR) reaction for reducing nitrogen oxides emissions, however, they only exhibit sufficient DeNO x efficiency within a narrow temperature window. In this study, a catalyst embedded with electrothermal alloy was prepared. The catalyst surface temperature could be heated using the electrothermal alloy, in order to widen the operating temperature window of the V 2 O 5 -WO 3 /TiO 2 catalyst. Experimental results revealed that the electrothermal alloy embedded V 2 O 5 -WO 3 /TiO 2 catalyst can maintain superior NH 3 -SCR performance and high resistance to H 2 O in a wide gas temperature range of 100–400 °C by controlling the surface temperature. In the meantime, the NH 4 HSO 4 poisoned catalyst could be efficiently regenerated through electric heating, and NO x conversion can be restored to the level of fresh samples. Additionally, the effect of additives including methylcellulose and glass fiber , on the physicochemical properties of the plate-type catalyst was also investigated, and the catalyst samples were characterized by means of BET, XRD , NH 3 -TPD, H 2 -TPR, TG and SEM-EDS. This study proves the electric heating strategy is a promising way to enhance the performance of the V 2 O 5 -WO 3 /TiO 2 during wide temperature SCR applications.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Tao Jiang,Ling Cheng,Yingchun Han,Jun Feng,Jingdong Zhang
A p-n heterojunction film of Bi 2 O 3 -WO 3 with enhanced photoelectrocatalytic (PEC) activity was successfully constructed by a facile one-pot hydrothermal synthesis. The as-prepared Bi 2 O 3 -WO 3 heterojunction film exhibited flower-like microstructures. Compared with pristine Bi 2 O 3 and WO 3 films, the Bi 2 O 3 -WO 3 composite film exhibited enhanced absorption in the visible region. The formation of Bi 2 O 3 -WO 3 p-n heterojunction facilitates the interfacial transfer of electrons as well as the separation of charge carries. As a result, the Bi 2 O 3 -WO 3 film showed high photocurrent response under visible light illumination. Furthermore, the enhanced visible light PEC performance of Bi 2 O 3 -WO 3 film was evaluated by the decoloration of Rhodamine B. When the Bi 2 O 3 -WO 3 film was applied to norfloxacin removal, the degradation efficiency reached 88.4% after 6 h PEC process under visible light illumination. According to nine intermediates identified by liquid chromatograph-mass spectrometric analysis, a possible PEC degradation mechanism for norfloxacin was proposed.
研究领域:
材料科学
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环境科学
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光催化
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Youxiu Wei,Mu Chen,Weiming Liu,Lei Li,Yue Yan
Electrochromic devices (ECDs) with different liquid electrolytes were fabricated using NiO film as counter electrode, WO 3 film as working electrode. The effect of liquid electrolytes containing different lithium salts (LiClO 4 , LiPF 6 , LiTFSI) on films and ECDs was investigated, such as transmittance change, charge density, memory effect and cyclic stability. Films or ECDs using LiPF 6 electrolyte have excellent electrochromic properties but low cyclic stability, compared with LiClO 4 and LiTFSI electrolytes. In order to deeply understand the effect of electrolyte on films and devices, the voltage distribution of films based on an analog cell and electrochemical impedance spectroscopy (EIS) were measured and analyzed in different lithium salts electrolytes. Results show that voltage distribution and EIS characteristics of films have obvious difference in liquid LiClO 4 , LiPF 6 and LiTFSI electrolytes. Voltage distribution on NiO and WO 3 films is unbalanced and the impedance of films in bleached and colored states is different in the same electrolyte.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Zhiqiang Xie,Qingqing Liu,Qianqian Zhang,Bingxin Lu,Jin Zhai,Xungang Diao
Mesoporous tungsten trioxide (WO 3 ) and nickel oxide (NiO) electrochromic (EC) thin films have been fabricated by sol-gel method with assistant of tri-block copolymer [PEO 132 PEO 50 PEO 132 ] (F108). By controlling weight ratio of F108 and calcination temperatures, uniform and transparent mesoporous films are fabricated. Both WO 3 and NiO films are comprised by nanoparticles with diameters of ca .10 nm, mesopores with pore size of approximately 6 nm are distributed in the films. The thickness of the films are ca . 400 nm. The as-prepared films have ultra-fast switching time during EC redox reactions . Applied with positive and negative voltages of 40 s respectively, the coloration/bleaching time of WO 3 and NiO films are 5.7 s/2.3 s and 0.9 s/3.8 s, which is faster than that of comparative EC films fabricated by sol-gel method without F108 (coloration/bleaching time of WO 3 and NiO films are 17.5 s/14.5 s and 13.6 s/4.9 s) and EC films fabricated by magnetron sputtering method (coloration/bleaching time of WO 3 and NiO films are 29.4 s/21.3 s and 9.6 s/7.5 s). Quasi-solid state electrochromic device assembled with mesoporous WO 3 and NiO thin films has excellent EC performance, such as fast switching speed (3.2/1.1 s for coloration/bleaching time), large optical modulation of about 45% (at 600 nm), high coloration efficiency (130.8 cm 2 /C at the wavelength of 600 nm) and good cycle stability. These excellent properties are derived from mesoporous channels in the films. For the mesoporous channels can shorten the diffusion paths and make it easier for ions to transport in films.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2013
·
IF 4.63
Jun Zhang,Jiang-ping Tu,Gao-hui Du,Zi-min Dong,Yi-shan Wu,Ling Chang,Dong Xie,Guo-fa Cai,Xiu-li Wang
Ultra-thin WO 3 nanorods (NRs) embedded polyaniline (PANI) composite thin films were synthesized by embedding WO 3 NRs into polyaniline using a surface-initiated-polymerization method, followed by spin-coating deposition. The ultra-thin WO 3 NRs with length of 60 nm and diameter of 4 nm were prepared by a solvothermal method . The nanofillers were well-dispersed in the polymer matrix . The nanocomposites were finally deposited onto ITO-coated glass via spin-coating technology. The electrochromic contrast, switching speed, and durability of the composite films were investigated in details. The composite film, being a dual electrochromic material, varied from purple to green, light yellow and finally dark blue. The switching speed (0.9 s) is much faster than the films only composed of WO 3 NRs. The durability of the hybrid film was enhanced compared with neat WO 3 NRs film.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jian Ding,Mingyi Xie,Zhen Li,Yang Wang
Given the persistent and detrimental impact of atmospheric ozone (O 3 ) on human health, achieving high-sensitivity detection of ozone at low temperatures is crucial for mitigating its harmful effects. Here, by hydrothermal synthesis and annealing, hexagonal and orthogonal WO₃ (h/o-WO 3 ) homojunction nanosheets were prepared and used as high-performance O 3 sensors. The results showed that the optimal operating temperature of the h/o-WO 3 sensor is 120 °C, the response value to 3.0 ppm ozone is 320.8, and the detection limit is 40 ppb. The mechanism shows that the homojunction structure increases the depletion layer thickness and carrier separation, which facilitates ozone decomposition and significantly enhances the ozone sensing performance. This study provides a novel approach for the preparation of high sensitive low temperature ozone sensing materials.
研究领域:
材料科学
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环境科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2018
·
IF 0
Kainan Song,Xueming Liu,Chen Tian,Hong Deng,Jide Wang,Xintai Su
In present study, two group of WO 3-x nanocrystals (NCs) have been prepared via a facile solvothermal process and their photocatalytic activities for dehydration of isopropyl alcohol (IPA) to propylene (C 3 H 6 ) under visible light irradiation have been studied. The photocatalysts are characterized by XRD , FSEM, HRTEM , XPS and UV–vis spectroscopic study. As for WO 3-x NCs synthesized under different temperature, the highest photocatalytic efficiency was achieved for the W 18 O 49 NCs prepared at 160 °C at C 3 H 6 evolution rate of 145 μmol h −1 g −1 . When it comes to the WO 3-x NCs obtained using different solvents, the sea urchin-like W 18 O 49 microspheres synthesized in ethanol has the greatest activity for photocatalytic dehydration of IPA. Their outstanding photocatalytic performances may stem from the large amount of oxygen vacancies (OVs) on their surfaces. The above results suggest the high potential of WO 3-x NCs in application for C 3 H 6 production.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Xin Xiao,Huan Zhong,Chunxia Zheng,Mingli Lu,Xiaoxi Zuo,Junmin Nan
Novel flower-like WO 3 ·H 2 O micro/nano-architectures are conveniently synthesized via a low-temperature oil bath route, and its catalytic oxidative desulfurization (ODS) activity for dibenzothiophene (DBT) in a model oil is systematically evaluated within an n-octane/acetonitrile (MeCN) biphasic system in the presence of H 2 O 2 as an oxidizing reagent. The results indicate that DBT can be effectively removed using the as-synthesized WO 3 ·H 2 O catalyst in the presence of H 2 O 2 and that the catalytic process follows pseudo-first-order kinetics. Under optimal conditions, i.e., n(S/catalyst) = 5 and n(H 2 O 2 /S) = 8 at 70 °C, the sulfur content is diminished from 4000 to approximately 220 μg g −1 after 60 min of reaction. The mechanistic study reveals that the desulfurization route is dominated by direct catalytic oxidation rather than indirect oxidation by radicals. The oxidation product is dibenzothiophene sulfone (DBTO 2 ) with almost 100% selectivity, and it can quickly migrate into the MeCN phase due to its highly polar nature, resulting in the removal of DBT from the oil phase. By combining the experimental results with the theoretical DFT calculations, the crystal structure of WO 3 ·H 2 O and the electronic structures of DBT vs. DBTO 2 are considered to be the key roles in this synchronized adsorption-catalytic oxidation-extraction process. In addition, the as-synthesized WO 3 ·H 2 O is structural stable during the reaction and can be also used to remove 4,6-dimethyldibenzo-thiophene (DMDBT), benzothiophene (BT), and thiophene (Th) in fuel oils, suggesting its potential for practical applications.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Kedir Ebrahim Ahmed,Dong-Hau Kuo,Misganaw Alemu Zeleke,Osman Ahmed Zelekew,Angaw Kelemework Abay
Sn-WO 3 /g-C 3 N 4 composites were synthesized by calcination method. The materials were characterized with different techniques and photocatalytic activities examined by the degradation of anionic methyl orange (MO) and cationic Rhodamine B (RhB) under visible light. 8% Sn-WO 3 /g-C 3 N 4 showed superior degradation efficiency with 87% MO and 99% RhB dye removal within 120 and 50 min of irradiation time, respectively. X-ray photoelectron spectroscopy (XPS) analysis reveals molecular oxygen adsorption on the surface of the as-prepared composite material. The introduction of tin in Sn-WO 3 solid solution with a high atomic Sn:W ratio of 1:2 and the construction of interfacial hetrojunction with graphitic carbon nitride (g-C 3 N 4 ) plays a vital role to enhance the photocatalytic activity of the as-prepared composites by activating oxygen to react with dye molecules.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 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）