CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shiyu Zhang,Aiguo Rao,Kai Lin,Qi Yao,Chunhui Niu,Lei Wang,Mingqing Yang,Xueqiong Bai,Yong Lv
Recently, the Fabry–Perot (F–P) cavity electrochromic devices, which are constructed by combining nano-size inorganic electrochromic material WO 3 and reflective metal layers, have attracted considerable attention due to their potentials in the fields of dynamic multicolor displays and active camouflage. However, in the few studies that have been reported, the peak reflectance of flexible F–P cavity multicolor electrochromic devices in the visible wavelength band is generally lower than 30 %, which limits their reflective display and camouflage effects in high-brightness environments. Thus, we have combined multicolor reflective electrochromic electrodes in WO 3 /Au asymmetric F–P nanocavity constructed by magnetron sputtering on a Nylon 66 porous substrate with a highly transparent UV-cured gel electrolyte and a PET plastic sealing procedure. As a result, a flexible and dynamic multicolor electrochromic skin with high reflectance (R max ＞50 %) and excellent flexibility (bending radius of 4 mm) has been fabricated. The WO 3 electrochromic layer at the top works as the dynamic dielectric layer in the broadband absorption Fabry–Perot cavity, and the inert metal Au layer at the bottom works as the reflective layer. The WO 3 /Au asymmetric F–P cavity can acutely capture the variation in optical constants of WO 3 due to the thickness change and electric-driven effects. This cavity facilitates the selective reflection and absorption of the energy distribution of the spectrum after the induced interferometric resonance. As a result, the cavity exhibits a rich array of structural colors, including ocher, taupe, yellow, orange, green, and violet. The electrochromic skin exhibits a fast switching time and maintains 99.43 % of the optical modulation amplitude (ΔR) after 110 coloring/bleaching cycles. It provides a potential option in the field of flexible high-brightness reflective displays and dynamic camouflage in the future.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Lihua Zhi,Shengya Zhang,Youyuan Xu,Jibing Tu,Min Li,Dongcheng Hu,Jiacheng Liu
Controllable fabrication of nanomaterials with hierarchical architecture have received much attention in the field of photocatalysis due to their enhanced light-harvesting efficiency. Moreover, fabricating direct Z-scheme heterojunctions have been proven to be effective way to enhance the photocatalytic performance of photocatalysts . Herein, hierarchically hollow WO 3 nanoflower was successfully synthesized by a simple hydrothermal treatment of tungsten chloride (WCl 6 ) in ethanol solution. Decoration of the obtained WO 3 with AgI nanoparticles in situ can form the Z-scheme AgI/WO 3 hollow hierarchical nanoflowers (AgI/WO 3 HHNFs). The AgI/WO 3 HHNFs exhibited excellent photocatalytic activity and remarkable stability for the degradation of tetracycline hydrochloride (TC-HCl) and Eosin B (EB) under the irradiation of a low energy consume light (LED lamp, 5 W). Interestingly, compared to pure AgI nanoparticles , 3D hollow WO 3 nanoflowers and AgI/WO 3 nanosheets , the AgI/WO 3 HHNFs revealed conspicuously enhanced photocatalytic activity . This phenomenon could be associated to three aspects, namely the high light-harvesting efficiency, increased light trapping and scattering capability and strongly coupled Z-scheme heterointerface, which effectively improved the photoelectron-hole sepreation efficiency. Our work therefore provide a novel insight for the fabrication of 3D hollow hierarchical structures.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Dong Li,Siyu Tian,Qiuhua Qian,Caiyun Gao,Hongfang Shen,Fei Han
A nitrogen-doped tungsten oxide/BiVO4 (N-WO3/BiVO4) heterojunction structure was obtained utilizing ammonium paratungstate as the nitrogen source and Bi(NO3)3·5H2O as the bismuth source, exhibiting promising photoelectrochemical (PEC) performances and effectively obtaining a long photoresponse range into the visible light region. Notably, the UV–vis diffuse reflectance spectra of N-WO3/BiVO4 (566 nm, 2.19 eV) exhibited a notable red shift of the absorption edge compared to that of WO3/BiVO4 (516 nm, 2.47 eV). The N-WO3/BiVO4 photoanode demonstrated an excellent photocurrent density of 0.78 mA cm–2 at 0.68 V vs Ag/AgCl, which surpassed those of the WO3/BiVO4 (0.20 mA cm–2), pure WO3 (0.25 mA cm–2), and pure BiVO4 (0.03 mA cm–2) photoelectrodes. The improvement of the PEC performances was primarily due to the synergy of N doping and the involved heterojunction structure, suggesting that N doping increased the Vis-light response and the heterojunction structure promoted charge separation to improve the lifetime of photoinduced carriers.
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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.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Shan Jiang,Jing Cao,Minna Guo,Dongdong Cao,Xuemei Jia,Haili Lin,Shifu Chen
Elemental red phosphorus (RP) has an ultra-low activity of splitting water for H 2 and O 2 evolution. In this study, RP was decorated by trace amount of WO 3 to greatly enhance the photocarriers separation and photocatalytic activity for overall water splitting under visible light. The 2.5% WO 3 /RP composite achieved the highest activity to produce H 2 and O 2 , and the activity was 7.0 times that of pure RP under visible light (λ ≥ 420 nm). The significantly increased photocarriers separation of WO 3 /RP was ensured by transient photocurrent, electrochemical impendence, photoluminescence, and time-resolved photoluminescence characterizations. More importantly, WO 3 /RP maintained high stability when it was persistently used for 20 cycles. Based on the reactive oxygen species ( O 2 − and OH) detected during the photocatalytic process, an S-scheme mechanism was proposed for WO 3 /RP composites to efficiently separate the photocarriers. This work provides a notion for improving the overall water splitting activity of RP via an S-scheme photocarriers separation mode.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·119827
·
IF 7.2
Chong Li,Yan Wang,Jinqiao Hou,Huanming Wang,Jingting Luo,Chen Fu,Fujian Ren,Jikai Zhang,Huiling Ong,Chenze Lu,Hang Xiao,Xi Chen,Ran Tao,Yuzhi Chen,Yongqing Fu,Qiang Wu,Xuejin Li
Ammonia, a key biomarker existing in human breath, plays a critical role in non-invasive breath testing at room temperature. Among various ammonia sensors, reflective fiber-optic sensors based on surface plasmon resonance (SPR) offer significant advantages, including high sensitivity, small footprint, and portability, making them ideal for room-temperature gas sensing. In this work, WO 3 /SnO 2 nanocomposites were synthesized via a solvothermal method to obtain sensitive materials for room-temperature NH 3 detection. The WO 3 /SnO 2 nanocomposites were deposited on the surface of the SPR fiber by dip-coating to form a uniform gas-sensitive film. The sensor exhibited exceptional performance, achieving a high sensitivity of −10.84 a.u./ppm, a fast response time of 2 s, and a theoretical limit of detection of 277 ppb at room-temperature. The enhanced sensing mechanism is attributed to the formation of WO₃-SnO₂ heterojunctions, which facilitate efficient charge transfer and amplify SPR signals via dielectric modulation. This work highlights the potential of low-dimensional material-integrated optical fiber platforms for non-invasive medical diagnostics through breath ammonia detection.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Lin Daifeng,Gong Wanyu,Lu Zeyang,Zhuo Qian,Yang Wenqing
Herein, Ru-doped V 2 O 5 -WO 3 /TiO 2 (VWTi) catalysts were prepared to study the impact of Ru doping on chlorobenzene (CB) oxidation activity. The introduction of Ru weakens the V–O bond strength, resulting in neutralizing the Lewis acid effect and optimizing the overall acid balance of the VWTi catalyst. Moreover, the presence of RuO 2 can significantly enhance the redox capability and surface lattice oxygen mobility. Hence, a significant improvement in both low-temperature activity and CO 2 selectivity has been achieved with the Ru-doped VWTi catalyst, reaching a CB conversion of 50% at 205 °C and a CO 2 selectivity of 73% at 400 °C for 0.50Ru-VWTi catalyst.
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高影响因子
ACS Sensors
·
2026
·
IF 10.9
Jie Hu,Yong Chen,Xuni Yin,Qi Zeng,Chang Chen,Jiu Yin
Although metal oxide semiconductors are promising candidates for practical disease diagnosis based on H2S detection, achieving high sensitivity and a low detection limit remains a considerable challenge. In this work, Ru-functionalized Mo-doped WO3 (Ru@Mo-WO3) nanosheets were successfully synthesized via a simple hydrothermal process followed by annealing and chemical reduction. The H2S sensing performances of all WO3-based sensors were systematically investigated. The optimized Ru@Mo-WO3 sensor exhibited a remarkable response of 120 to 5 ppm H2S at the optimal operating temperature, which was approximately 30 times higher than that of pristine WO3. Moreover, the Ru@Mo-WO3 sensor demonstrates short response times, excellent H2S selectivity, and remarkable long-term stability with a low detection limit (7.9 ppb). Comprehensive experimental analyses and density functional theory (DFT) simulations reveal that the significant enhancement in sensing performance originates from the synergistic effects of Mo doping and Ru sensitization. Meanwhile, a wireless gas-detection device based on the as-fabricated Ru@Mo-WO3 gas sensor was developed to achieve real-time monitoring of oral H2S for noninvasive oral hygiene assessment. This study offers a promising strategy for the rational design of high-performance WO3-based H2S sensors.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yanan Fu,Ping Wang,Lijie Zhao,Dongcai Su,Lili Sui,Bing Zhao,Yan Jiang,Haixia Yu
Non-invasive early detection of liver disease via breath analysis is a long-sought, yet challenging, target in sensor research. High humidity, complex chemical composition, and substantial inter-individual differences in exhaled breath significantly complicate the breath analysis for liver disease diagnosis. In this work, hierarchical WO 3 polyhedrons were successfully prepared via a simple hydrothermal method. The as-prepared WO 3 material showed the highest ever-reported response (268.2) to 10 ppm limonene (a critical biomarker for liver diseases) at 100°C, with a remarkable detection limit of 10 ppb. Various characterization techniques, including O 2 -TPD, XPS, and gas chromatography-mass spectrometry (GC-MS), were employed to thoroughly analyze the sensing mechanism of WO 3 toward limonene. Based on a comprehensive understanding of the entire sensing process, a robust few samples with high feature dimensionality orient machine learning algorithm was used to assist the sensor in decoding response features specific to limonene from complex breath analysis response singles, thereby achieving 99.9% correct classification rate for distinguishing exhaled signals from liver disease patients and healthy controls in 200 independent cross-validation tests. This work presents the first successful integration of machine learning with a highly sensitive WO 3 -based limonene sensor, offering significant potential for non-invasive, real-time, and cost-effective early detection of liver diseases.
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ChemSusChem
·
2023
·Vol. 16
·期 11
·e202202184
·
IF 8.4
Shaoru Tang,Yanan Ma,Haimeng Wang,Yuxuan Liang,Xiaoyang Xu,Dingyu Zhang,Beiming Cao,Qian Wang,Wei Li
Graphical Reverse the microemulsion : Through adjusting the phase inversion in the reverse microemulsion system by using supercritical carbon dioxide, 2D/2D WO 3 /g-C 3 N 4 heterojunction photocatalyst is constructed via a one-pot method, which exhibits excellent photocatalytic activities towards the hydrogen evolution during water splitting. Construction of Z-scheme photocatalyst is an effective approach for using solar energy to produce hydrogen during water splitting. Herein, 2D/2D WO 3 /g-C 3 N 4 heterojunction photocatalyst was synthesized by a convenient and green method including exfoliation and heterojunction procedures, in the reverse microemulsion system via supercritical carbon dioxide (scCO 2 ). The resultant W/CN-10.3 composite exhibited enhanced photocatalytic activities towards the hydrogen evolution during water splitting with a hydrogen evolution rate of 688.51 μmol g −1 h −1 , which was more than 16 times higher than bulk g-C 3 N 4 with the same loading amount of Pt as cocatalyst. Due to its effective separation of photogenerated carriers and prolonged lifetime, more photoexcited electrons with high reduction ability could contribute to the production of H 2 . Possible formation mechanism of 2D-2D WO 3 /g-C 3 N 4 nanosheets via scCO 2 in the reverse microemulsion system by the one-pot method has been proposed. This work provides an efficient and green strategy to synthesize 2D-2D heterojunction for the utilization in solar-to-fuel conversion.
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PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Feng Xiao,Yewen Xiao,Wei Ji,Linlin Li,Yimeng Zhang,Minmin Chen,Hualin Wang
Ethylene (C 2 H 4 ) and pathogenic microorganisms are the two major causes of the deterioration of postharvest fruits and vegetables (F&V). Hence, the development of active packaging with C 2 H 4 scavenging and bactericidal activities is urgently desirable. Herein, a novel photocatalytic active film (CS-PC-AC) is developed for banana preservation by incorporating WO 3 /AgBr/Ag photocatalyst (PC) and activated carbon (AC) into chitosan (CS). The fabricated PC is a ternary Z -scheme heterojunction and its high photocatalytic activity is achieved by the bridge of Ag between WO 3 and AgBr through rapid transfer and separation of photogenerated electrons and holes. AC plays an indispensable role in the photocatalytic reaction through molecule adsorption and transport. PC and AC are hydrogen bonded with chitosan and their incorporation has slight effect on film's thermal stability but decreases the film's mechanical and barrier properties to some extent. CS-PC-AC exhibits strong bactericidal activity (killing ~100 % of Escherichia coli and Staphylococcus aureus within 3 h) and good C 2 H 4 scavenging activity (C 2 H 4 scavenging rate of 49 ± 2 %) under visible light irradiation , which can extend the banana shelf-life by at least 50 % at 25 °C. These results indicate the good perspective of CS-PC-AC in the delay of the deterioration of postharvest F&V.
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PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 22
·6827-6837
·
IF 6.177
Penghui Li,Junhua Gao,Jing Shi,Huixiang Wang,Xiangying Xing,Jingzhao Ren,Yu Meng,Liancheng Wang,Baoliang Lv
Linear terminal olefin epoxidation is a significant oxidation reaction for the synthesis of valuable industrial intermediates. As typical olefin epoxidation catalysts, supported tungsten oxides are rich in oxygen vacancies, which have been investigated for improving catalytic performance in other reactions, but the influence on olefin epoxidation is rarely studied. Herein, a series of WO3−x/SBA-15 catalysts with different oxygen vacancy concentrations were obtained by impregnation and sequent hydrogen reduction at 300–600 °C. Their catalytic performances for 1-hexene epoxidation with hydrogen peroxide at 70 °C were studied. It was found that an appropriate concentration of oxygen vacancies could improve epoxidation (the epoxide productivity increased from 135 to 196 μmolepoxide gW−1 min−1) and reduce the apparent activation energy (from 51.6 to 46.9 kJ mol−1). The oxygen vacancies are also beneficial for cycloolefin and other linear olefin epoxidation. In particular, the productivity of cyclooctene oxide was promoted from 4161 to 5744 μmolepoxide gW−1 min−1. This promotion effect was attributed to the increase in the number of Lewis acid sites caused by introducing moderate oxygen vacancies, which could improve the activation of hydrogen peroxide and facilitate epoxidation. In situ FT-IR spectroscopy and density functional theory calculations further indicated that increasing the oxygen vacancies contributes to reducing the energy barrier of the transfer of electrophilic oxygen atoms in active intermediate W–OOH to 1-hexene, thereby promoting epoxidation.
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