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.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
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.
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npj Materials Degradation
·
2025
·
IF 7.6
Tian Jing,Cheng Yuanhang,Zhang Zhenyu,Zhao Zhibo,Xu Zhenxu,Li Jiarun
Metal corrosion and biofouling in marine environments significantly constrain the long-term service performance of marine equipment. Traditional protection strategies suffer from issues such as low efficiency and insufficient environmental friendliness, necessitating the development of novel, highly efficient, and stable anti-corrosion and anti-fouling materials. In this study, a dual-functional WO 3 /Bi 2 WO 6 Z-scheme heterojunction photoelectrode was fabricated via a two-step hydrothermal method. The results of UV–visible diffuse reflectance, Mott-Schottky, as well as density functional theory calculations confirmed the successful construction of the Z-type heterojunction. The construction of the Z-scheme heterojunction not only enhances the separation efficiency of photogenerated charge carriers but also directionally regulates their migration pathway, preserving photogenerated electrons with strong reducing capability and photogenerated holes with strong oxidizing capability, therefore, the potential of 316L stainless steel could be negatively shifted by 200 mV, while the sterilization rate of Pseudomonas aeruginosa reached 100% within 60 min.
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CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Jiale Han,Guofan Wang,Xu Hu,Jinlin Li,Zhaojun Xie,Zhen Zhou
Rechargeable lithium oxygen (Li–O2) batteries are regarded as promising candidates for future energy storage systems due to their exceptionally high theoretical energy density. However, their practical implementation faces major obstacles, including high charge and discharge overpotentials and a semiopen battery structure that is highly sensitive to humidity. These factors lead to reduced efficiency and poor stability in moist air, significantly limiting real-world application. To address these challenges, a composite photoelectrode was developed by directly growing tungsten trioxide (WO3) nanoribbons on carbon paper (CP), followed by the uniform deposition of platinum nanoparticles using atomic layer deposition. Compared to WO3 photoelectrode, the resulting Pt–WO3 photoelectrode enables stable operation of photoassisted Li–O2 batteries under humid oxygen atmosphere. The batteries sustain stable operation for over 100 cycles without failure at current densities of 0.05 and 0.2 mA cm–2. Advanced characterization and theoretical calculations confirm the formation of an ohmic contact between platinum and tungsten trioxide, which promotes the separation of photogenerated electrons and holes, improves charge transfer, and facilitates the reversible formation and decomposition of lithium hydroxide (LiOH). This strategy effectively overcomes critical barriers faced by conventional Li–O2 batteries in real-world environments and provides a promising direction for the design of environmentally tolerant and photoelectrochemically efficient energy storage systems.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Khanh-Huyen Nguyen,Thu-Hien Le,Thi-Duyen To,Xuan-Duc Nghiem,Dinh-Trinh Tran
MgFe 2 O 4 /rGO/WO 3 (MAG) Z -scheme visible light-driven photocatalyst was successfully synthesized with high purity. Synergic effects within MAG Z -scheme photocatalyst effectively enhanced the photocatalytic activity by a factor of 1.5–3.3. The photocatalytic performance was evaluated through the degradation of tetracycline (TC), ciprofloxacin (CIP) antibiotics, methylene blue (MB), direct blue 71 (DB-71), livestock and textile industrial wastewaters. MB and DB-71 degradation efficiency catalyzed by MAG reached 90.22 ± 2.56 % and 87.62 ± 2.26 % after 150 min, while these figures for TC and CIP were respectively 84.47 ± 2.16 % and 78.58 ± 2.36 %. The removal efficiency depended on contact time, pH value, catalyst dosage, pollutant concentration, and co-existing ions. Radical trapping tests and electron paramagnetic resonance spectroscopy analyses showed that superoxide anion radicals were mainly responsible for degrading the pollutants. The chemical oxygen demand and toxicology assessment revealed about 75 % of organic dyes and 67 % of antibiotics were mineralized while the toxicology of the by-products was negligible. The photocatalytic performance was high and stable after five repetitive cycles, with no discernible changes to the photocatalyst's surface properties. COD removal efficiency for textile and livestock wastewaters respectively reached 48.6 % and 42.9 %, lower than those for synthetic samples due to the presence of other organic compounds and co-existing ions, but met national technical regulations on the effluents of livestock and textile industry of Vietnam. The findings in this work provide a practical approach to mitigating hazardous organic dyes and antibiotics commonly found in textile and livestock wastewaters, thereby protecting public health and the environment.
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CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Likun Zhou,Jifeng Pang,Aiqin Wang,Tao Zhang
Jerusalem artichoke stalk (JAS) was employed as the feedstock for the production of ethylene glycol (EG) with a combined catalyst comprising commercial WO 3 and Raney Ni. The raw JAS contains 51.6 wt% cellulose, 10.3 wt% hemicellulose, 17.2 wt% lignin, 1.7 wt% ash, and 19.2 wt% water-soluble substances. It was found that the lignin component in the JAS had little effect on the conversion of hemicellulose while the water-soluble substances caused a negative effect, which led to an EG yield of only 29.9%. After a simple hot water pretreatment, most of the water-soluble substances were removed, and the EG yield was increased to 37.6%. Moreover, the hot water pretreatment also led to an improvement in the durability of the catalyst. The effects of reaction temperature and reaction duration were also investigated.
研究领域:
生物质能
·
催化化学
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Molecular Catalysis
·
2026
·
IF 4.3
Kai-Xiong Dai,Kuan Wang,Yu-Rui Chao,Yue Yang,Xin-Peng Li,Zhen-Hong He,Weitao Wang,Huan Wang,Zhao-Tie Liu
The photothermal selective oxidation of cyclohexane to produce KA oil (cyclohexanone and cyclohexanol) under solvent-free conditions holds significant importance. However, the one-step photothermal oxidation of cyclohexane to produce downstream high-value products adipic acid (AA) remains a challenge at present. Hereby, a highly efficient Z-scheme CeCoO 3 /WO 3-x heterojunction photothermal catalyst was designed and constructed based on the interface engineering. Through photothermal synergistic effects, CeCoO 3 /WO 3-x achieves the efficient and highly selective oxidation of cyclohexane under solvent-free conditions and visible-light irradiation. Notably, the cyclohexane conversion reached 13.7 % with an overall selectivity of 97.6 % (where liquid KA oil selectivity was 65.2 % and solid AA selectivity was 32.4 %). The enhanced catalytic performance stems from the Z-scheme heterojunction structure, which effectively promotes photogenerated charge separation and transport, suppresses charge recombination, broadens the light response range, and exhibits a large specific surface area with porous structure. This study provides novel insights for designing highly efficient photothermal catalytic systems for the selective oxidation of low-carbon alkanes.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Erzhu Sun,Hong Li,Lanjie Xu,Shihao Zhang
In this study, NH2-MIL-101(Fe)/WO3 heterojunctions were prepared by solvothermal method and then incorporated into polyvinylidene fluoride (PVDF) membranes via phase inversion method to fabricate recyclable photocatalytic membranes with high degradation performance. The SEM and XRD characterization results indicated that NH2-MIL-101(Fe) and WO3 were physically combined. Using MB as the target pollutant, the membrane with 30 mg of Tungsten trioxide（WO 3 ） doping exhibited optimal degradation performance, achieving complete MB degradation within 100 min and a TOC removal rate of 85 %. During the degradation process, superoxide radicals (·O 2 − ), hydroxyl radicals (·OH) and photogenerated holes (h⁺), played a major role. The results of UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence (PL) spectra showed that the incorporation of WO 3 effectively suppressed the recombination of electron-hole pairs and enhanced visible light absorption, thereby improving the photocatalytic activity. Transient photocurrent response (i-t) and electrochemical impedance spectroscopy (EIS) tests further demonstrated that the composite photocatalyst with 30 mg of WO 3 exhibited the highest photocurrent density and the lowest charge transfer resistance. Degradation cycling experiments revealed that after four cycles of degradation, the PVDF photocatalytic membrane maintained high photocatalytic activity for MB. This study suggests that the combination of NH 2 -MIL-101(Fe)/WO 3 and PVDF membranes provides a promising new approach for exploring wastewater treatment solutions.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Shanghua Feng,Binbin Zhao,Lei Liu,Jinxiang Dong
Platinum-loaded WO3–Al2O3–SiO2 catalysts, denoted as Pt/WAlSi, in glycerol hydrogenolysis to 1,3-propanediol (1,3-PDO) with a batch reactor were investigated, wherein the WO3-doped silica–alumina material with a homogeneous dispersion was prepared by sol–gel method and Pt was loaded onto it by incipient wetness impregnation. The catalysts were characterized by powder XRD, N2 adsorption–desorption, TEM, CO chemisorption, NH3-TPD, Py-IR, and XPS. The WO3/Al2O3 ratio and Pt loading amount are shown to be of importance in determining the activity and directing the selectivity to 1,3-PDO. It was found that 2% Pt/WAlSi with the ratio of WO3 to Al2O3 at 2 has a suitable Brønsted acidity and contributes to a high selectivity to 1,3-PDO close to 56% at 48% glycerol conversion, and the space time yield for 1,3-PDO in an optimized reaction condition could reach 18.34 g/(gPt h), much higher than the best result reported in the literature. A plausible mechanism of glycerol hydrogenolysis was proposed from the reaction results.
研究领域:
催化化学
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应用化学
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材料科学
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工业催化
·
绿色化学
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Y.X. Wei,Y.B. Ma,M. Chen,W.M. Liu,L. Li,Y. Yan
Electrochromic devices (ECDs) based on WO 3 and Ti doped V 2 O 5 films are fabricated by using lithium (LiClO 4 ) liquid electrolyte containing ferrocene redox couple . The addition of ferrocene in electrolyte enhances electrochromic properties of device. The device based on LiClO 4 -Ferrocene electrolyte has larger charge density than that based on LiClO 4 electrolyte. In the 600–1500 nm wavelength range, the transmittance of colored device is under 2% and it has faster coloring response. At 680 nm wavelength, it shows larger changes in transmittance from 68% to 1.8% while device based on LiClO 4 electrolyte changes transmittance from 68.3% to 11.5%. The cycling data reveal that device based on LiClO 4 -Ferrocene electrolyte can yield more stable electrochromic properties at 65 °C than room temperature. In order to deeper understand the effect of electrolyte on films and devices, electrochemical impedance spectroscopy (EIS) and the voltage distribution of films based on an analog cell are separately measured and analyzed in LiClO 4 and LiClO 4 -Ferrocene electrolytes. Results indicate that compared with LiClO 4 electrolyte, films have lower charge-transfer resistance and the distributed voltage on Ti doped V 2 O 5 film is larger in LiClO 4 -Ferrocene electrolyte, which can enhance optical properties of ECD by improving charge density of Ti doped V 2 O 5 film.
研究领域:
材料科学
·
电化学
·
功能材料
·
纳米科技
·
能源技术
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Journal of Bioresources and Bioproducts
·
2026
·
IF 13
Xiuling Yang,Jingjiang Yang,Gaigai Duan,Xiaoshuai Han,Hui Fu,Yong Huang,Chunmei Zhang,Shuijian He,Shaohua Jiang
Photo- and electro-chromic devices can facilitate the realization of a wide set of future applications, ranging from transparent displays, dynamic windows, optical switches, and variable optical attenuators. Tungsten oxide (WO 3 ) has always been the most studied material in the field of photo- and electro-chromic, although it has some bottlenecks. Here, we report a flexible transparent wood membrane for photo- and electro-chromic applications. The photochromic membrane (PCM) shows excellent photochromic properties, including high optical modulation (Δ T 1030 nm = 68.8%), ultraviolet (UV) shielding (> 92%) and dynamic light regulation. Meanwhile, the electrochromic membrane (ECM, active area: 1 cm × 2.5 cm) and assembled complementary devices (active area: 3.4 cm × 3.4 cm) produce high optical modulation (Δ T 1030 nm = 78.2%) at 1030 nm, and the transmittance in colored state of below 10%. Noteworthy, the ECM (active area: 3.4 cm × 3.4 cm) comprised of WO 3 /Ag nanowires (NWs)/flexible wood-derived transparent cellulose membranes, reveals enhanced optical modulation (60.7%) and rapid response time (coloring/bleaching time: 7.6 s/10.8 s). Moreover, the electrode also presents good cycling stability (96.2% after 120 cycles). The design of these chromic devices introduces an innovative strategy, which is expected to open up a new way for the development of photo- and electro-chromic devices. Crucially, the inherent flexibility and scalability of the transparent wooden substrate enable it to maintain relatively stable performance across different device dimensions, thereby resolving practical challenges in real-world applications.
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Journal of Nanoelectronics and Optoelectronics
·
2025
·Vol. 20
·期 9
·980-989
·
IF 0.5
Wang Lin
Current electrochromic materials face challenges in balancing conductivity, switching speed, and long-term stability for automotive applications. This study presents a novel sol–gel synthesis strategy for fabricating nanostructured tungsten oxide (WO3) and poly(3,4-ethylenedioxythiophene):poly(styrene
sulfonate) (PEDOT:PSS) composite films. The method is based on precursor complexation regulation, where the peroxo-complexation state of tungsten is precisely controlled to moderate hydrolysis rates. The sulfonic acid groups of PEDOT:PSS provide coordination constraints, guiding the confined
nucleation and uniform growth of WO3 nanocrystals within the conductive polymer matrix. This in-situ hybridization results in a nanocomposite film characterized by continuous electron pathways and rapid ion diffusion interfaces. Comprehensive optoelectronic characterization
reveals that the optimized film exhibits an optical contrast of 62.9% at 550 nm and a high coloration efficiency of 72.1 cm2 · C−1. The device demonstrates fast switching kinetics, with coloring and bleaching times of 3.1 s and 4.7 s, respectively. Critically,
the film maintains 92% of its optical modulation after 10,000 electrochemical cycles, highlighting exceptional durability. The enhanced performance is attributed to the synergistic nano-architecture, which facilitates efficient charge transport and minimizes inter-facial resistance. These
results underscore the potential of this nanocomposite film as a high-performance electrochromic material for next-generation automotive smart windows.
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