APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yuanfang Shen,Jingxuan Shou,Liangchen Chen,Weihang Han,Luping Zhang,Yutong Chen,Xuewei Tu,Shangfu Zhang,Qiang Sun,Yurong Chang,Hui Zheng
Photocatalytic nitrogen fixation from air directly under sunlight can contribute significantly to carbon neutralization. It is an ideal pathway to replace the industrial Haber Bosch process in future. A Fe-doped layered WO 3 photocatalyst containing oxygen vacancies was developed which can fix nitrogen from air directly under sunlight at atmospheric pressure. The iron doping enhances the transport efficiency of photogenerated electrons. The photocatalytic efficiency is around 4 times higher than that of pure WO 3 . The optium nitrogen fixation conditions were examined by orthogonal experiments and its nitrogen fixation performance could reach up to 477 μg·g cat −1 ·h −1 under sunlight. In addition, the process of nitrogen fixation was detected by situ infrared, which confirmed the reliability of nitrogen fixation. Also, modeling on the interactions between light and the photocatalyst was carried out to study the distribution of surface charge and validate the light absorption of the photocatalyst. This work provides a simple and cheap strategy for photocatalytic nitrogen fixation from air under mild conditions.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
CHEMISTRY LETTERS
·
2020
·Vol. 49
·期 11
·1421-1425
·
IF 1.361
Wang Shaohua,Zhang Hanying,Li Hao,Wu Ruijie,Hua Zhongqiu,Wu Yi,Tian Xuemin
WO3 nanosheets were synthesized by an acidification method and Cr was loaded on the surface of nanosheets via an impregnation procedure. The morphologies of pristine and Cr-loaded WO3 nanosheets were analyzed. Gas sensors based on pristine and Cr-loaded WO3 nanosheets were fabricated by a screen-printing technique and their sensing properties were also investigated. It was found that the catalytic modification of Cr can significantly improve the sensing performance of WO3 nanosheets to ammonia. In addition, the sensitization mechanism of Cr-loaded WO3 could be caused by the electrical sensitization effect and more stable product in the sensing processes to ammonia.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 8
·439
·
IF 4.2
Ensi Cao,Yixuan Zhang,Li Sun,Bing Sun,Wentao Hao,Yongjia Zhang,Zhongquan Nie
The development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health and safety. To enhance the acetone sensing performance of LaFeO3nanoparticles for practical applications, commercial n-type WO3nanoparticles were incorporated as additives. They were directly mixed with LaFeO3nanoparticles produced through a sol-gel method, creating a series of WO3-LFO nanocomposites with varying mass ratios. These nanocomposites were characterized using XRD, SEM, BET, and XPS techniques. Compared to pure LFO nanoparticles, the prepared nanocomposites exhibited larger specific surface areas with enhanced surface reactivity. The introduction of p-n heterojunctions through the mixing process improved the regulation of acetone molecules on internal carrier conduction within nanocomposites. As a result, the nanocomposites demonstrated superior acetone sensing performance in terms of optimal operating temperature, vapor response value, selectivity, and response/recovery speed. Notably, the nanocomposites with a 5wt% addition of WO3showed the lowest optimal operating temperature (132 °C), the fastest response/recovery speed (28/9 s), and the highest selectivity against ethanol, methanol, and EG. On the other hand, the nanocomposites with a 10wt% addition of WO3displayed the maximum vapor response value (55.1 to 100 ppm) at an optimal operating temperature of 138 °C, along with relatively good repeatability, stability, and selectivity.Keywords:LaFeO3;WO3;nanocomposites;acetone;XPS
研究领域:
材料科学
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传感器技术
·
表面化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Kun Wang,Hongliang Zhang,Guoxin Chen,Tian Tian,Kai Tao,Lingyan Liang,Junhua Gao,Hongtao Cao
The complementary electrochromic devices based on WO 3 and Prussian blue electrodes (PB) have shown a limited chemical stability and durability because WO 3 is degraded in electrochromic performance and PB is gradually dissolved in the Li + -based electrolyte under neutral pH conditions. Herein, the utilization of acetic acid as super-additive solution was proposed to improve WO 3 cathodes and stabilize PB anodes, in which the highly nanoporous nanocrystal-in-glass WO 3 and hierarchical PB was made by electron beam evaporation and electrochemical deposition method, respectively. Our findings suggest that synergistic effects of Li + and H + on WO 3 and Prussian blue electrodes contribute to the improvement on electrochemical, electrochromic, and cycling stability performance of the whole device. Impressively, the WO 3 -PB complementary electrochromic device could experience a superior long-term cycling stability of over 10,000 cycles, with a high coloration efficiency of 137.80 cm 2 C −1 and a maximum transmittance modulation of 66.22%@ 633 nm. All these results open a new way to the construction of high-performance electrochromic devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Jianke Tang,Qiaoling Li,Rongqian Meng,Yanfeng Xue,Shengjian Zhang,Shengjuan Shao
Using the prepared Ag 3 PO 4 /WO 3 ·H 2 O composite as the matrix, AgI nanoparticles were introduced onto the surface of Ag 3 PO 4 to construct AgI/Ag 3 PO 4 /WO 3 ·H 2 O ternary heterojunction photocatalysts. The ternary composite photocatalysts exhibited higher photocatalytic degradation activities for rhodamine B (RhB) and tetracycline hydrochloride (TCH) than those of binary Ag 3 PO 4 /WO 3 ·H 2 O and AgI/WO 3 ·H 2 O photocatalysts and individual AgI, Ag 3 PO 4 , and WO 3 ·H 2 O photocatalysts. After exposure to visible light for 12 and 24 min, the removal efficiencies of RhB and TCH by the S2-50% photocatalyst (50% molar percentage of AgI to Ag 3 PO 4 ) reached 98.0% and 85.3%, respectively. After four degradation cycles, the removal efficiency of RhB by S2-50% remained at 93.2%, significantly surpassing that of the Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst. The enhanced photocatalytic performance of the AgI/Ag 3 PO 4 /WO 3 ·H 2 O photocatalyst is primarily attributed to the formation of Z-scheme/conventional Type II heterojunctions, which facilitate spatial separation of the photogenerated electrons and holes while maintaining the strong reductive capabilities of electrons in the AgI conduction band.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Lianwei Wang,Jianxin Liu,Yawen Wang,Xiaochao Zhang,Donghong Duan,Caimei Fan,Yunfang Wang
A metastable hexagonal WO 3 (h-WO 3 ) was prepared by a hydrothermal reduction method with glycerol and the Ag 3 PO 4 /h-WO 3 composites were synthesized via a precipitation method. Several techniques were employed to characterize the Ag 3 PO 4 /h-WO 3 composites. Compared to the Ag 3 PO 4 /WO 3 photocatalysts, the Ag 3 PO 4 /h-WO 3 photocatalysts exhibited an excellent visible light photocatalytic performance for efficient degradation of methyl orange (MO). The analysis results showed that the favorable photocatalytic performance of the Ag 3 PO 4 /h-WO 3 composites were mainly attributed to the h + and O 2 − generated during the recycles of W 6+ and W 5+ . Furthermore, under the same conditions, the Ag 3 PO 4 /h-WO 3 composites showed better stability than pure Ag 3 PO 4 photocatalyst for degradation of MO, indicating that h-WO 3 played an important role in the process of degradation. Based on the results of trapping experiments and XPS characterization analysis, the photocatalytic mechanism of the Ag 3 PO 4 /h-WO 3 composites were proposed.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiongya Jin,Ye Yang,Chen Yuan,Jinchang Lei,Weijie Song
The polymer electrolyte (PE) is the key component for a typical laminated WO 3 –NiO electrochromic device (ECD). However, the electrochemical fragility usually makes it be easily damaged by the parasitic side oxidation reaction from the Ni 4+ at nickel oxide to generate gas bubbles within a short term running. Herein, we disclose a viable strategy through adopting WO 3 covered NiO as counter electrode to address this problem. In this investigated case, to render the ECD with neutral color, our previously-developed Nb doped WO 3 , Li and Si co-doped NiO, and PVB based electrolyte are employed as the basic constituents. The results demonstrate that the sputtered WO 3 cover layer offers multiple advantages, involving forming an ultra-thin blocking layer to avoid a direct contact between nickel oxide and electrolyte, improving the film quality by removing the defects and achieving an effective W doping in nickel oxide matrix to ensure a highly cyclic stability, decreasing the Li + transport impedance to realize a rapid response, enhancing the device critical current density to 0.45 mA cm −2 to conduct a trade-off between response rate and lifetime, and constructing a homogeneous electric field to realize an uniform coloring or bleaching over a larger 100 cm 2 sized ECD.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 53
·期 2
·899-906
·
IF 2.1
Wang Caiyun,Zhou Yanhong,Liu Zhimin
A composite of WO 3 and WS 2 has a wider wavelength range of light adsorption and light emission than WS 2 . A noble metal nanostructure can be utilized to adjust the photoluminescence (PL) of luminescent materials. In this study, WO 3 -WS 2 flakes were synthesized. A straightforward bath method has been employed to synthesize Ag nanoparticles (NPs). The average size of Ag NPs is approximately 60 nm. The Fourier transform infrared (FT-IR) peak of WO 3 -WS 2 flake at 495 cm −1 is from an alkane S–S bond stretching vibration. The PL intensity of WO 3 -WS 2 was attenuated subsequent to its integration with Ag NPs. The PL quantum yield of the WO 3 -WS 2 /Ag composite can reach 0.11%. This occurrence can be explained by the pronounced resonance absorption and diminished light extraction induced by the Ag NPs. This decreased light emission of the Ag NPs incorporated with WO 3 -WS 2 may be employed in some situations needing extinction, such as photography and projection. Graphical Abstract
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
APPLIED OPTICS
·
2024
·Vol. 63
·期 10
·A70
·
IF 1.7
FengHong Chu,Dan Pei,ZhengLan Bian,YiSheng Sun,AnDuo Hu,GuiLin Zhang,Liang Xue,JiaWen Han,JiaMeng Zhang
Tungsten oxide (${{\rm WO}_3}$) has been widely used in hydrogen sensing due to its stable chemical properties and high oxygen vacancy diffusion coefficient. However, the response of pure ${{\rm WO}_3}$ to hydrogen is slow, and doping is an effective way to improve the hydrogen sensing performance of ${{\rm WO}_3}$ materials. In this paper, ${{\rm WO}_3}/{\rm Pt}/{\rm PEG}/{{\rm SiO}_2}$ porous film was prepared by the sol-gel method using tungsten powder, ${{\rm H}_2}{{\rm O}_2}$ and ${{\rm C}_2}{{\rm H}_5}{\rm OH}$ as precursors, polyethylene glycol (PEG) as the pore-forming agent, and tetraethyl orthosilicate (TEOS) as the ${{\rm SiO}_2}$ source material. The sensing properties of the ${{\rm WO}_3}$ composite for hydrogen were characterized by a transmission optical fiber hydrogen sensing system made at home. The process parameters such as water bath time, aging time, W:PEG ratio, and W:TEOS ratio were optimized to improve the sensitivity and response time of the sensing film. The experimental results indicate that the sensitivity is 15.68%, the average response time is 45 s, and the repeatability is up to 98.74% in 16 consecutive tests. The linearity index ${{\rm R}^2}$ is 0.9946 within the hydrogen concentration range of 5000 ppm to 50,000 ppm. The film responds only to ${{\rm H}_2}$ when the concentration of interfering gases (${{\rm CH}_4}$, CO, ${{\rm CO}_2}$) is 2000 ppm. The hydrogen sensing performance of the optimized film is significantly improved compared with that of the undoped film.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Lingnan Qu,Junyu Lang,Shuwei Wang,Zhanli Chai,Yiguo Su,Xiaojing Wang
In this paper, WO 3 -wrapped NaTaO 3 nanospheres photocatalysts with different W/Ta molar ratios were successfully prepared via a facile hydrothermal method. The samples were characterized by X-ray diffraction, transmission and scan electron microscopy, X-ray photoelectron spectroscopy, FT-IR spectrum, UV−vis diffuse reflectance spectroscopy, and Barrett−Emmett−Teller technique. The photocatalytic activities for degrading tetracycline hydrochloride under visible light irradiation were examined. The results indicated that the as-prepared NaTaO 3 @WO 3 photocatalysts showed the obvious enhancement in the tetracycline hydrochloride degradation ratio, compared with the pure NaTaO 3 and WO 3 under visible light irradiation. The optimum percentage of NaTaO 3 @WO 3 composites with a 60.88% degradation rate was W:Ta = 0.3:1 in mole, which was mainly attributed to the effective separation of the photo-generated electron and hole as well as the expanding of the absorption edge to the visible region due to the spherical heterojunction by wrapping WO 3 on the surface of NaTaO 3 . The radicals trapping experiments demonstrated that there were multiple active species during the degrading process of TC. The possible mechanism of tetracycline hydrochloride degradation by NaTaO 3 @WO 3 composite was also proposed.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Yi Zhong,Zhihua Ying,Yan Liu,Chenhan Zhang,Wenjun Yan,Yuan Jiang
Conventional metal oxide semiconductor gas sensors are inherently limited by their dependence on high operating temperatures (200–400℃), which leads to increased energy consumption and reduced long-term device stability. To overcome these challenges, this study presents a glycine-assisted solvent evaporation synthesis route for the preparation of highly dispersible WO 3 nanoparticles. Glycine acts dually as a crystallographic modulator during nanoparticle growth and as an interfacial stabilizer, allowing for control over both particle size and oxygen vacancy concentration. Subsequent annealing removes residual glycine while preserving the optimized nanostructure. The optimized 6-WO 3 sensor synthesized using 6 mmol glycine exhibits remarkable low-temperature sensing performance, demonstrating a response value of 270.9 toward 3 ppm NO 2 at a reduced operating temperature of 120°C compared to conventional WO 3 -based counterparts while maintaining high sensitivity. Systematic characterization links this energy-efficient performance to synergistic effects between enhanced gas diffusion pathways, evidenced by a BET surface area of 20.59 m 2 /g, and precise modulation of electron depletion layers via glycine-mediated oxygen vacancy engineering. This work advances a practical paradigm for designing metal oxide semiconductor sensors that harmonize high sensitivity with operational sustainability, highlighting their transformative potential in next-generation environmental monitoring systems.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Yue Chang,Kai Yu,Chenxi Zhang,Rui Li,Peiyuan Zhao,Lan-Lan Lou,Shuangxi Liu
Ag 3 PO 4 nanoparticles were firstly deposited into the three-dimensionally ordered macroporous WO 3 (3DOM-WO 3 ) with different pore sizes. The resulted Ag 3 PO 4 /3DOM-WO 3 composites were characterized by XRD, SEM, TEM and DR UV–vis. These composite photocatalysts showed extraordinarily excellent efficiencies in the visible light degradation of organic contaminants and water splitting for oxygen evolution, which were mainly due to the synergic effect of Ag 3 PO 4 and 3DOM-WO 3 as well as the periodic macroporous structure of 3DOM-WO 3 . Especially, the catalyst A5W5 with Ag 3 PO 4 :WO 3 mass ratio of 5:5 exhibited the highest catalytic activity, and complete degradation could be achieved within 4 min for phenol and three typical dyes investigated in this work. In addition, the slow photon effect in Ag 3 PO 4 /3DOM-WO 3 was demonstrated, and the pore size of 3DOM-WO 3 was found to have a significant influence on the catalytic performance. The catalyst A5W5(270) showed notably higher photocatalytic activity than A5W5(150) and A5W5 (420), which was mainly attributed to the exact overlap between the stop-band of 3DOM-WO 3 (270) and the electronic absorption band of Ag 3 PO 4 /3DOM-WO 3 composite. Moreover, these composite catalysts were very stable and could be recycled ten times without any loss in photocatalytic activity for RhB degradation. More excitingly, remarkably improved activity and durability were also obtained over Ag 3 PO 4 /3DOM-WO 3 in water splitting for oxygen evolution. According to the XPS and HRTEM characterizations of used catalyst, the enhanced durability was mainly attributed to the effective transfer of photogenerated electrons from Ag 3 PO 4 to 3DOM-WO 3 .
研究领域:
材料科学
·
环境科学
✓ 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）