SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Mingyang Gao,Wen Zhang,Jun Guo,Licun Fu
Gas sensors integrated with intelligent systems are of great importance for real-time environmental monitoring and personal exposure assessment. In particular, nitrogen dioxide (NO 2 ), a toxic byproduct of combustion and industrial processes, poses severe risks to human health even at trace levels, highlighting the urgent need for sensitive and portable monitoring technologies. Here, we present a tungsten trioxide (WO 3 )/carbon nanotubes (CNTs)-based flexible sensor coupled with an Integrated Intelligent Sensing System (IISS) capable of on-site NO 2 detection, signal processing, and wireless mobile display. The optimized WO 3 /CNTs sensor exhibits outstanding sensing performance, delivering a high response of 425.1 % toward 1 ppm NO 2 . Distinctively, by integrating the sensor into the IISS platform, real-time NO 2 concentrations can be acquired, processed, and displayed on a mobile device, enabling direct and user-friendly exposure monitoring. These results highlight the novelty of combining a high-performance WO 3 /CNTs sensor with a miniaturized IISS, offering a practical strategy for intelligent, wearable, and portable gas detection applications.
研究领域:
环境健康监测
·
生物医学工程
·
纳米生物技术
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可穿戴设备
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转化医学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xuefeng Liu,Hao Zhou,Shuzhao Pei,Shupo Xie,Shijie You
Photoelectrocatalysis (PEC) represents a promising method for water decontamination, but the overall performance is limited by slow interfacial charge transfer. In this study, we address this limitation by creating an efficient PEC system with oxygen-deficient WO 3−x nanoplate array film serving as photoanode through surface reduction method. Oxygen vacancy had a slight impact to catalytic activity of photoanode, but exhibited an enhanced performance when anodic polarization was imposed. Based on a front-side illumination and potential of 1.2 V vs standard hydrogen electrode (SHE), the WO 3−x photoanode produced a photocurrent being 7.3 times as WO 3 photoanode, indicating a substantially enhanced interfacial charge transfer. Both WO 3 and WO 3−x electrodes showed an insignificant removal of 4-chlorophenol (4-CP) and dechlorination under individual photocatalytic condition. When anodic polarization was applied at 1.2 V vs SHE, 85.5% removal of 4-chlorophenol (4-CP) and 48% dechlorination efficiency could be obtained for WO 3−x photoanode, accounting for the values being 32.7% and 25.8% higher than that for WO 3 photoanode. The corresponding first-order kinetic constant for 4-CP removal by WO 3−x ( k = 0.0157 min −1 ) was approximately 2.53 times as that by WO 3 ( k = 0.0062 min −1 ). The improved PEC performance of WO 3−x photoanode under low potential bias should result from faster interfacial charge transfer, mitigation of electron-hole recombination, and production of higher amount of hydroxyl radical ( OH). This study not only suggests the important role of oxygen vacancy in PEC system, but also provides a new strategy to develop a full solar-energy-based water purification system.
研究领域:
环境科学
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材料科学
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DOI
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Catalysts
·
2026
·Vol. 16
·期 2
·
IF 4.5
Xiaoxia Ye,Qiu Wu,Guifang Yang,Yuancai Lv,Minghua Liu
Developing green water disinfection technology has been attracting much attention all over the world. In this work, a WO3/BiOBr@Si composite was obtained through the solvothermal process, which exhibited denser and fuller intersecting petal-like spheres (1–3 μm in diameter) and retained its 3D sheet-like pore structure. The optical and electrochemical analysis demonstrated that the doped Si showed insignificant improvement in UV-Vis light absorption but greatly promoted the electron-hole separation efficiency and charge transfer capability on the surface of the catalyst at a 4.6 wt% Si doping dosage, resulting in an excellent performance in the inactivation ofEscherichia coli(E. coli) under the irradiation of visible light. Under the optimal conditions (0.5 g/L of WO3/BiOBr@Si dosage, 107CFU mL−1ofE. coliconcertation, and 30 min of treating time), the largest log value decline (6.6) occurred with WO3/BiOBr@1.0Si, which was 3.3 and 1.8 times larger than those of BiOBr (2.0) and WO3/BiOBr (3.7). According to the TEM, SEM, EDS, XRD, FTIR, and XPS analyses, in the photocatalytic system, the hole (h+) and •OH were the main species for inactivatingE. colicells. These oxidizing species could attack the components on the surface of cells (such as the hydroxyl, carbonyl, ester, and amide groups of polysaccharides (PS) and proteins (PT)), resulting in the inactivation and destruction of the cell membranes and leakage of intracellular substances. The findings will provide a significant guide for developing an efficient catalyst for the green water disinfection process.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Tiantian Feng,Zhijie Cui,Pengfei Guo,Xuehong Wang,Juan Li,Xien Liu,Wenpin Wang,Zhongcheng Li
Recent experimental analysis indicates WO 3 -based nanostructures exhibit poor hydrogen evolution reactivity, particularly in alkaline medium, arising from the low electron transfer rate. It is imperative to tune the composition and structure of WO 3 to boost the cleavage of H-OH bond. Here, we construct Ru/WO 3 -W 2 N/N-doped carbon sheets (Ru/WO 3 -W 2 N/NC) using m-WO 3 nanosheets as precursors with the aid of RuCl 3 , Tris (hydroxymethyl) aminomethane, and dopamine. Structural investigation reveals the formation of N-doped carbon sheets, Ru nanoparticles, and WO 3 -W 2 N. As a result, hydrogen evolution reactivity is greatly improved on Ru/WO 3 -W 2 N/N-doped carbon sheets with 64 mV at 10 mA/cm 2 in 1 mol/L (M) KOH, outperforming most of WO 3 -based electrocatalysts in previous literatures. Meanwhile, it facilitates the generation of H 2 in 0.5 M H 2 SO 4 with the excellent activity of 110 mV at 10 mA/cm 2 . Our work provides an efficient strategy to tailor the electronic structure of WO 3 to catalyze acidic and alkaline hydrogen evolution reaction.
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Tong An,Yan Qin,Hao Cheng,Jianning Wu,Weihua Su,Guihua Meng,Hongxiao Wei,Chenhui Sun,Zhiyong Liu,Xuhong Guo
Phosphorus (P) is an essential nutrient widely used in crops. Phosphate fertilizers are easily adsorbed on the soil surface, resulting in poor migration to the roots of crops, and a large amount of nutrients cannot be absorbed and utilized, resulting in waste of resources and low bioavailability . To solve the problem of insufficient mobility of phosphate fertilizer, this work uses TiO 2 -WO 3 to catalyze the oxidation and pyrolysis of lignite to synthesize small molecular humic acid , and uses small molecular humic acid to coat commercial phosphate fertilizer (MAP) to obtain a new type of phosphate fertilizer (AMAP) with good fluidity. Water contact angle was determined from initially hydrophobic (132°) to hydrophilic (76°). Humic spectroscopic ratio (E 4 /E 6 ), H/C and molecular weight distributions confirmed the effectiveness of the TiO 2 -WO 3 catalyst and the successful modification of weathered lignite. The migration characteristics of phosphorus in the soil were studied by leaching migration experiments. The results showed that the effective phosphorus content of the new coated phosphate fertilizer (AMAP) in the soil exceeded that of the commercial phosphate fertilizer (MAP) at different vertical migration distances. After 21 d of incubation at the same fertilizer level, new coated phosphate fertilizer (AMAP) of phosphate fertilizer added with different products showed elevated levels of P. Migration data indicated that the migration distance of effective phosphorus approximated the long root distance of early corn, which benefitted crop growth. The pot experiment confirmed improved corn growth and improvement in the utilization rate of phosphorus fertilizer. All in all, activated lignite (AHA) can reduce or inhibit the fixation of phosphorus nutrients in the soil, and has obvious application value for improving the efficiency of phosphate fertilizers.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yuan Li,Hongtao Wang,Yueying Liu,Yueyue Li,Chenchang Wang,Jihao Bai,Lin Yang,Yilin Wang,Fengmin Liu,Xishuang Liang,Geyu Lu
Bimetallic nanocrystals (NCs) have received a lot of attention due to its excellent catalytic performance. Here, PtRu NCs were successfully synthesized by ethylene glycol and used to modify flower-like WO 3 which was prepared via a simple hydrothermal method . The morphology and structure of the as-synthesized materials were characterized, and the performance of the gas sensor based on PtRu NCs decorated WO 3 was carefully studied. The gas sensing investigation showed that there was a significant improvement in response after PtRu NCs being introduced. Among all samples, the WO 3 sample modified with 0.4 wt% PtRu NCs showed the highest response to xylene at 170 °C (Ra/Rg = 261), which is almost 75 times than that of pristine WO 3 . In addition, it also presented fast response speed (2 s), good selectivity to xylene and excellent repeatability. The possible sensitization mechanism was proposed, the improvement of sensing performance could be ascribed to the high catalytic activity of PtRu NCs, and the regulation of depletion layer by Schottky barrier and heterojunction at the contact interface between WO 3 and PtRu NCs. This work can be promising for rapid detection of xylene for environmental protection at low temperature.
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高影响因子
CARBON
·
2021
·
IF 9.594
Jin-Bo Cheng,Yan-Qin Wang,Ai-Ning Zhang,Hai-Bo Zhao,Yu-Zhong Wang
Nowadays, there is an urgent need for microwave absorbing materials with light weight, thin thickness, and strong absorbing ability to solve the problem of electromagnetic radiation. In this study, we report a novel high-performance aerogel absorber by growing MoO 3 -doped WO 3 nanoflakes on reduced graphene oxide (rGO) sheets. The resultant rGO-Mo-WO 3 aerogel displays a low density (∼75 mg/cm 3 ) and unique hierarchical architectures including 3D porous microstructures, 2D rGO skeleton, and binary transition metal oxide of Mo-WO 3 nanoflakes, thus leading to excellent microwave absorption performances . Typically, rGO-Mo-WO 3 aerogel exhibits an ultra-strong reflection loss (RL) of −61.8 dB with a thin coating thickness of 1.54 mm. And a wide effective absorption bandwidth of 6.24 GHz can be achieved at a low filler loading of 8 wt%, much superior to previous ones. The synergistic effect of moderate polarization relaxation loss and weak conduction loss together with the porous microstructure for the aerogel result in the suitable impedance matching and strong microwave attenuation ability. This work may demonstrate a promising method to fabricate hierarchically nanostructured absorbers with the advantages of light weight, ultra-strong microwave absorption, and thin coating thickness.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 4
·900-905
·
IF 1.307
Liu Xiaoyan,Zhou Yan,Zheng Tingting,Tian Yang
W ith the advancement of nanomaterials for surface-enhanced Raman scattering(SERS) detection, a deeper understanding of the chemical mechanism(CM) and further applications has been achieved. Herein, we prepared a porous tungsten trioxide(WO 3 ) film by the pulse electrodeposition method, and constructed a WO 3 film SERS aptasensor. With methylene blue(MB) as the adsorption molecule, the developed WO 3 film SERS aptasensor revealed remarkable Raman activity. Through experimental data and theoretical calculations, we found that the significant SERS enhancement[enhancement factor(EF)=1.5× 10 6 ] was due to the CM based on charge transfer and molecular resonance. Utilizing the Raman response of MB on the WO 3 film and specific aptamers, we successfully developed the aptamer sensor by covalently attaching the MB modified aptamer to the WO 3 film. The sensor realized the specific and sensitive determination of vascular endothelial growth factor(VEGF) with the detection limit down to 8.7 pg/mL. In addition, the developed aptasensor indicated the excellent selectivity among other interferences, such as metal ions, reactive oxygen species(ROS), and proteins. This WO 3 film SERS aptasensor not only contributed to the study of the enhancement mechanism of semiconductor material, but also provided a powerful platform for the sensitive detection of VEGF, possessing a great potential in the real-time monitoring of biomarkers of glioblastoma in vitro .
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高影响因子
FUEL
·
2020
·
IF 5.578
Zisheng Zhang,Chenxiao Zhao,Shuanglong Lin,Hong Li,Yalan Feng,Xin Gao
A novel oxygen vacancy (OVs) modified Bi 2 MoO 6 /WO 3 hybrid electrode based on the ITO glass was successfully fabricated by a facile two-step hydrothermal and solvothermal method with one calcination process between two reactions. The result exhibited an enhanced optical harvesting and photogenerated electron migration capability. In the degradation process of rhodamine B (RhB), the hybrid electrode showed a better photoelectrocatalytic removal ratio of 80.1% within 4 h under visible light irradiation and 2.0 V bias, which is mainly ascribed to the synergistic promotion of surface OVs, heterostructure and external bias. The optical features and band structures of the composite catalyst were analyzed to give out the possible electrode system mechanism of the PEC degradation process. This work not only constructs a newly designed OVs Bi 2 MoO 6 /WO 3 photoelectrode but also provides some investigations in fabricating and controlling process of photoelectrodes.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Ling Hu,Zhiwen Wang,Yingzhang Shi,Cheng Liu,Yidong Hou,Jinhong Bi,Ling Wu
The defect-rich ultrathin WO 3 nanosheets are successfully prepared as photocatalysts via heating treatment for the pristine WO 3 nanosheets (NS) in vacuum (NSV) and N 2 atmosphere (NSN). The increment of degradation efficiencies of levofloxacin (LVX) over NS (49.9 %)
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 6
·3140-3150
·
IF 3.925
Xingrui Qi,Zhidong Zhao,Nian Li,Zijian He,Yufang Chen,Tao Jin
At present, water resources contaminated by pathogenic microorganisms have an increasingly serious impact on human health. Photocatalytic sterilization using solar energy is an inexpensive and effective method. However, how to effectively utilize solar energy and improve the photocatalytic performance of catalysts is the main problem at present. In this work, urchin-like WO3−x and Cu-doped WO3−x were synthesized by a simple method. The synthesized photocatalysts were characterized in detail, and the sterilization performance of the catalysts was investigated under simulated sunlight. The sterilization rates of WO3−x against Escherichia coli and Staphylococcus aureus were 65.74% and 94.73%, respectively, while the sterilization rates of WO3−x doped with Cu against these two bacteria were 99.95% and 99.24%, respectively. Cu–WO3−x shows excellent photocatalytic bactericidal performance, which is attributed to the enhanced oxygen vacancies of WO3−x and the separation of photogenerated electron–hole pairs by the doping of Cu. This work is expected to provide an effective way to develop solar photocatalytic sterilization.
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高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yue-Hua Li,Ming-Yu Qi,Zi-Rong Tang,Yi-Jun Xu
Coupling photocatalytic hydrogen (H2) evolution with selective organic synthesis in one redox cycle showcases great potential for the coinstantaneous utilization of photoexcited electrons and holes toward sustainable production of value-added fuels and chemicals. Herein, we construct one-dimensional/two-dimensional (1D/2D) WO3/ZnIn2S4 (WO3/ZIS) hierarchical Z-scheme composites for bifunctional integrated light-driven H2 production and biomass-derived aromatic alcohol conversion. The superior photoactivity and selectivity over WO3/ZIS composites compared with that over bare WO3 nanorods (NRs) and ZIS nanosheets (NSs) can be attributed to the assembly of the Z-scheme heterostructure. The construction of WO3/ZIS direct Z-scheme composites not only facilitates the charge separation dynamics by transporting photoinduced electrons and holes to spatially separated redox sites but also steers the selectivity of targeted products by tuning the energy band potentials to endow electrons and holes with stronger reduction and oxidation abilities. The mechanistic studies combining the control experiments and electron paramagnetic resonance spectroscopy validate the free radical mechanism of the benzyl alcohol photooxidation reaction. It is anticipated that this work would offer a conducive paradigm for the ingenious design of high-performance Z-scheme heterostructured catalysts toward the solar light-driven collaborative redox of H2 production and selective organic synthesis.
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