SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Chuanxuan Zhou,Jun Min,Linchuan Zuo,Fuchao Yang,Zhiguang Guo
Listeria monocytogenes (LM), a foodborne bacterium capable of causing various diseases, emits 3-hydroxy-2-butanone (3H-2B) and dimethyl trisulfide (DMTS) in its exhaled gas, which can serve as important biomarkers for the bacterium. To date, there have been no reports on the use of dual-selective sensing for these two biomarkers to enhance the accuracy of LM detection. Therefore, we prepared a WO₃ hierarchical architecture using rapeseed pollen templates and employed defect engineering to endow the sensing material with abundant oxygen vacancies for dual-functional monitoring of 3H-2B and DMTS. The results indicate that, thanks to the synergistic effects of abundant oxygen vacancies and unsaturated W⁶⁺ Lewis acids on the surface, the WO 3-X sensor exhibits excellent dual gas sensing performance for 3H-2B and DMTS. Notably, the WO 3-X (N₂) sensor achieves maximum responses of 20.4 and 18.7 for 20 ppm 3H-2B and 20 ppm DMTS at 168 °C and 185 °C, respectively, which are higher than those of other sensors. In addition to high sensitivity, the WO 3-X (N₂) sensors exhibit high selectivity and long-term stability, implying their potential for practical LM detection. Therefore, this work provides a new perspective for the rational design and synthesis of high-performance sensing materials for precise detection of LM to ensure food safety.
研究领域:
材料科学
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传感器与生物传感器
·
食品安全
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纳米技术
·
环境监测
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhu Weijie,Lin Yu-Chang,Cong Jianlong,Zhao Mengting,Li Jiahao,Hao Cong,Jia Jun,Wang Xinlu,Huang Yunhui,Lin Yan-Gu,Yang Gang,Yao Fen,Liang Hanfeng
The electrocatalytic nitrate reduction reaction (NO 3 - RR) offers a promising route to sustainable ammonia synthesis, potentially replacing the energy-intensive Haber-Bosch process. While often studied in neutral or alkaline media, NO 3 - RR in acidic conditions is particularly relevant due to widespread industrial acidic nitrate wastewater, yet it remains challenging due to corrosion and dominant hydrogen evolution. To address this, we designed a corrosion-resistant Ru/WO 3- x heterostructure that spatially separates proton and nitrate adsorption sites. Here, we show that a reverse hydrogen spillover effect, where the WO 3- x support stores and transports protons to surface Ru active sites, dramatically enhances hydrogenation kinetics and suppresses parasitic hydrogen evolution. This catalyst achieves an ammonia Faradaic efficiency of 94.09% at a high current density of 500 mA cm −2 and a working potential of 0.026 V vs. reversible hydrogen electrode. Furthermore, we demonstrate a sulfide-nitrate “batterolyzer” with a discharge power density of 43.4 mW cm −2 . This work reveals an effective proton-management strategy for efficient acidic NO 3 - RR, advancing its potential for coupled ammonia synthesis and wastewater treatment.
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PubMed
高影响因子
Journal of Nanomaterials
·
2018
·
IF 2.207
Zhenguang Shen,Zengying Zhao,Jian Wen,Jingwen Qian,Zhijian Peng,Xiuli Fu
Tungsten oxide (WO3−x) crystalline nano/microrods with identical morphology but different contents of oxygen vacancies were prepared by thermally evaporating fixed amount of WO3 powder in reductive atmosphere from different amounts of S power at 1150°C in a vacuum tube furnace, in which both sources were loaded in separate ceramic boat. With increasing amount of S powder, a series of tungsten oxides, WO3, WO2.90, W19O55 (WO2.89), and W18O49 (WO2.72), could be obtained. And devices were fabricated by screen-printing the obtained WO3−x crystals on ceramic substrates with Ag-Pd interdigital electrodes. With increasing content of oxygen vacancies, the devices fabricated with WO3−x crystals present a negative to positive resistance response to relative humidity. Under dry atmosphere, for the devices with increasing , the strong response to light changed from short to long wavelength; under light irradiation, the conducting ability of the devices was enhanced, due to the more efficient separation and transportation of the photogenerated carriers; and under simulated solar irradiation, the photocurrent intensity of the W18O49 device was roughly 8 times, about 500 times, and even 1000 times larger than that of the W19O55, WO2.90, and WO3 one, respectively. With the versatile optoelectrochemical properties, the obtained WO3−x crystals have the great potential to prepare various humidity sensors and optoelectrical devices.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yingying Qian,Jianhai Wang,Yuesong Shen
Heterojunction engineering has garnered significant attention in photocatalysis as an effective strategy to address the rapid carrier recombination dynamics in semiconductor photocatalysts. The core challenge in constructing high-performance heterojunction systems lies in establishing optimized interfacial connections to achieve directional charge carrier migration. This study proposed a temperature-regulated band engineering strategy, through precise control of Ni-MOFs growth temperature and integration with WO 3-x possessing exceptional photothermal conversion capacity, to successfully construct an efficient Z-scheme heterojunction system. When the synthesis temperature of the Ni-MOF reached 140 °C, its conduction band negatively shifted to −1.2 eV (vs. NHE), resulting in a well-matched Z-scheme heterojunction with WO 3-x . The optimized 140-Ni-MOF/WO 3-x heterojunction demonstrated remarkable enhancement in charge separation efficiency while preserving strong redox capabilities through the Z-scheme charge transfer pathway. Under mild gas-solid reaction conditions (H 2 O as electron donor), the optimized catalyst exhibited excellent CO 2 reduction performance, achieving a CO production rate of 111.17 μmol·g −1 with 96.92 % selectivity. The temperature-depended modulation strategy for MOF electronic band structure proposed in this study paved the way for constructing efficient MOF-based photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Chenlong Zhao,Hao Zhang,Yaoyang Wang,Lihailiang Xu,Yuan Wan,Xianwu Xiu
Noble metal and semiconductor composite substrates possess high sensitivity, excellent stability, and selective enhancement, establishing them as a significant research focus in the field of surface-enhanced Raman scattering (SERS). Tungsten oxide (WO 3 ), as an n-type semiconductor with high thermal stability, corrosion resistance, and outstanding electrochromic properties, has great potential in SERS research. This study designed and fabricated a flexible composite SERS substrate based on oxygen-deficient tungsten oxide nanostructures, achieving optimal detection performance by combining 3D WO 3-x nanowires on carbon cloth (CC) with silver nanoparticles (AgNPs). The high-aspect-ratio WO 3-x nanowires were prepared using a functional group-induced "competitive growth" hydrothermal method. The bandgap was modulated through atmosphere annealing to introduce oxygen vacancies (self-doping), which effectively improved the charge transfer efficiency and surface plasmon resonance, thereby achieving superior SERS performance. This composite SERS substrate benefits from the synergistic contributions of electromagnetic and chemical enhancement mechanisms, achieving ultra-low detection limits of 10 −12 M for Rhodamine 6 G (R6G). Within the concentration range of 10 −7 M to 10 −12 M, there is a good linear relationship between concentration and peak intensity, demonstrating excellent quantitative analysis capabilities. Furthermore, leveraging its mechanical flexibility, this substrate holds broad application prospects in areas such as food safety and environmental monitoring.
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高影响因子
RARE METALS
·
2025
·
IF 11
Chen Taoran,Qin Tian,Sun Hongli,Su Chenliang
Photocatalytic oxidation of toluene to valuable benzaldehyde offers a promising pathway for sustainable production of fine chemicals and pharmaceuticals. In this process, photogenerated holes play a crucial role in C(sp 3 )-H bond dissociation. However, the photocatalytic performance of current photocatalysts is often hindered by the low separation and transfer efficiency of photogenerated charges. In this work, we presented a perovskite-based heterostructure via in situ growth of defective WO 3- x nanosheets on Cs 2 AgBiBr 6 nanoparticles for photocatalytic toluene transformation. In situ Fourier transform infrared spectroscopy tests proved the introduction of oxygen-deficient WO 3- x component enhanced the chemisorption of molecular oxygen. The in situ electron paramagnetic resonance and 4-chloro-7-nitro-1,2,3-benzoxadiazole fluorescence measurements further confirmed the presence of oxygen vacancies, and the formation of heterostructure synergistically accelerated the formation of the superoxide radicals and the transfer of photogenerated charge carriers. Under visible light irradiation, Cs 2 AgBiBr 6 /WO 3- x photocatalyst could effectively oxidize toluene toward benzaldehyde with a conversion rate of 9020 μmol g −1 h −1 , which was a 3.5-fold increase over that of the unmodified Cs 2 AgBiBr 6 . Graphical abstract
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
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IF 4.175
Yunfang Huang,Hui Xu,Dan Luo,Yuezhu Zhao,Yu Fang,Qiyao Guo,Yuelin Wei,Leqing Fan,Jihuai Wu
To improve the utilization efficiency of solar energy and separation of photogenerated carries, a novel three-dimensional (3D) WO 3-x /Bi/BiOCl hierarchical heterostructures with broad spectrum responsive photocatalytic activity have been fabricated through a facile solvothermal technique. The influences of varying loading of WO 3-x on the physical performances of the as-obtained composites were systematically characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy , X-ray photoelectron spectroscopy, optical absorbance, photoluminescence and specific surface areas. The WO 3-x /Bi/BiOCl displayed a strong optical absorption from 250 to 2500 nm, and showed the superior photocatalytic performance in degradation of rhodamine B (RhB) than that of individual components. Among the as-prepared samples, the sample S24 with the appropriate content of WO 3-x displayed the best photocatalytic performance, which can photodegrade RhB with the efficiency of 100%, 100% and 96% under the UV light within 8 min, visible light within 3 min and near-infrared light within 120 min exposure, respectively. Furthermore, a plausible mechanism of the RhB degradation on WO 3-x /Bi/BiOCl photocatalysts under the near-infrared light irradiation was proposed according to the photocatalytic activity and radical species trapping experiments.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Zhiming Sun,Yuhang Gao,Chaogang Ban,Jiazhi Meng,Jinshu Wang,Kaiwen Wang,Liyong Gan
Oxygen vacancy (Vo) engineering is a powerful tool to improve semiconductor metal oxide-based surface-enhanced Raman scattering (SERS) activity due to the enriched surface states of substrates. However, the current energy-consuming high-temperature hydrogen reduction methods of introducing Vo and the poor sensitivity impede practical applications of semiconductor SERS. In this work, a facile solvothermal method was developed to prepare ultrafine WO3–x nanorods (∼3 nm width) for high-performance SERS substrates. The lowest detection limit of the rhodamine 6G (R6G) molecule on the Vo substrate can be as low as 10–10 mol/L and exceeds that of unmodified WO3 by more than two orders of magnitude. Experimental and calculated results suggest that the Vo-induced localized surface plasmon resonance (LSPR), diverse vibronic coupling, and enhanced charge transfer synergistically account for this outstanding activity. These findings can provide insights into the rational design of oxygen vacancy-tailored semiconductor SERS substrates.
研究领域:
材料科学
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纳米技术
·
光学
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DOI
高影响因子
NANOTECHNOLOGY
·
2025
·Vol. 36
·期 45
·455703
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IF 2.8
Shuangqi Dong,Yuge Feng,Chao Wang,Zhaopeng Huang,Ajit Khosla,Hui Zhang
As a transition-metal oxide semiconductor with variable tungsten valence states and abundant oxygen vacancies, WO3−x has attracted broad interest because its localized surface plasmon resonance performance can be tuned via controlling the concentration of oxygen vacancies. In this work, Cs-doped WO3−x nanosheets (Cs-WO3−x) were synthesized by solvothermal method. Subsequently, Cs-WO3−x were further annealed in hydrogen and air atmosphere, respectively, forming a compact, highly crystalline surface layer (with thickness of ∼14 nm) on the surface while retaining abundant oxygen vacancy defects in the center region (denoted as a-Cs-WO3−x). As a proof-of-concept, the as-prepared nanosheets were employed as light harvesting materials in photocatalytic degradation of methyl orange (MO), a-Cs-WO3−x nanosheets demonstrate significantly improved degradation efficiency with respect to WO3−x and Cs-WO3−x counterparts. The enhanced performance can be attributed to the hot-carrier transfer routes, which relies on not only direct electron transfer but also the more efficient plasmon-induced resonant energy transfer pathway. This work develops new pathway and provides important insights into the regulation of oxygen vacancies.
研究领域:
材料科学
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纳米技术
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光催化
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等离激元学
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半导体物理
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DOI
PubMed
高影响因子
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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高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yihui Li,Kun Chang,Hongwei Tang,Bao Li,Yalei Qin,Yan Hou,Zhaorong Chang
To address the large structural and volume changes of commercial WO 3 during charge/discharge, which make this material unsuitable for use in Li-ion batteries (LIBs), we herein prepared oxygen deficient WO 3- x nanosheets on a large scale by thermal treatment of ammonium paratungstate in a reducing atmosphere followed by sonication and freeze-drying. The above nanosheets were employed as LIB anode materials and exhibited a specific capacity and cycling stability significantly exceeding those of oxygen-deficient WO 3- x nanoparticles and commercial WO 3 . In addition, we investigated the effect of nanosheet loading on electrode performance, demonstrating that the best results (Li storage capacity of ∼628 mAh g −1 after 100 cycles at 100 mA g −1 ) were obtained at a nanosheet content of 20 wt%. This excellent performance was ascribe to the good exposure of defects caused by the comparatively small size of WO 3- x nanosheets , which resulted in an increased number of sites and diffusion paths available for Li-ion storage and transfer. The novel electrode-optimized strategy may be extended to the fabrication of other electrodes that use nanomaterials as active substances due to its superior comprehensive performance and low cost.
研究领域:
材料科学
·
电化学
·
纳米材料
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能源存储
·
电池技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Wei Wen,Jianru Gao,Man Zhao,Qinyun Yan,Liwu Qiang,Shuai He,Peipei Zhao,Chunmei Liu,Jiamin Ma,Li Zhang,Junming Zhang,He Xiao,Jianfeng Jia
To enhance the kinetic rate of oxygen evolution reaction (OER) in water splitting, a composite (WO 3-x /CNT) of multivalent WO 3-x coupling with carbon nanotube (CNT) is successfully synthesized by a facile electric field-assisted synthesis method. The characterization data indicate that an oxygen bridge structure of W– O –C is formed in WO 3-x /CNT due to strong interaction between WO 3-x and carbon nanotubes. Benefitting from this unique interfacial W– O –C structure, the electronic structure of tungsten sites is regulated through electron-transfer from tungsten atoms to carbon atoms. This obtained electronic structure promotes the intrinsic activity of WO 3-x /CNT and optimizes the adsorption of active OH∗ species. Moreover, the CNT support improves the overall conductivity. The optimal WO 3-x /CNT-2h sample exhibits an overpotential of only 326 mV (without iR compensation) at 10 mA cm −2 , much lower than that of commercial RuO 2 (341 mV). With the introduction of illumination, OER activity on WO 3-x /CNT-2h is tremendously enhanced and the overpotential is reduced to 276 mV at 10 mA cm −2 . This improvement is attributed to photo-generated holes, which creates additional active sites for OER. This work not only encourages the application of novel electrosynthesis methods for designing multivalent metal-based OER electrocatalysts but also highlights the synergistic effect of photoelectricity in enhancing OER performance.
研究领域:
材料科学
·
电化学
·
能源转换
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高影响因子
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