Catalysts
·
2024
·Vol. 14
·期 11
·763
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IF 3.8
Wenxuan Du,Xiren Xia,Zhen Li,Fuzhen Liu,Yin Xu
Advanced oxidation process based on heterogeneous activation of peroxymonosulfate (PMS) has received significant attention in wastewater remediation. Herein, a facile and effective electrochemical method was introduced in a tungsten sulfide (WS2)-activated PMS process for the removal of a typical azo dye Acid Orange 7 (AO7) in aqueous solution. It was found that the electrochemical activation could remarkably promote the removal of organic pollutants by coupling with WS2/PMS system. The elimination of AO7 in the electro-assisted WS2-activated PMS (E/WS2/PMS) system achieved 95.8% of AO7 removal in 30 min, with the optimal conditions of 1.0 g/L WS2, 1.0 mM PMS, current density of 1.0 mA/cm2and initial pH of 6.5. Based on quenching experiments and EPR techniques, mechanistic studies confirmed that hydroxyl radical (•OH) and singlet oxygen (1O2) are the primary reactive oxygen species for the oxidation of pollutants. In addition, the influences of pH, WS2dosage, PMS concentration, current density, common anions and humic acid on the AO7 removal are also investigated in detail. Furthermore, the system exhibited resistance to aqueous matrices, verifying the accepted applicability in real water (i.e., Yangtze River water and Shahu Lake water). In summary, this study demonstrates a green system for the effective removal of contaminants in water, holding significant implications for practical application.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Weitao Su,Jiake Li,Fei Chen,Li Fu,Su Ding,Shichao Zhao,Qi Zhang,Yunhua Gao
Two-dimensional (2D) monolayer (1L) transition metal dichalcogenides (TMDs) suffer from low absorption in the visible light region. Nonradiative energy transfer (NRET) is an effective method to enhance such absorption, which, as shown in this study, can be accomplished by using surface nitridized carbon quantum dots (CQDs). The optical absorption and photoluminescence (PL) of CQDs in the visible light region can be greatly enhanced by increasing the level of nitridization. The nitridized CQDs exhibit weak p-type doping but strong PL quenching in contact with vapor transport (VT)-deposited 1L-WS2. Owing to the good overlap between the fluorescence and absorption spectra for CQDs and 1L-WS2, an interactive NRET process reduces the PL lifetimes of both CQDs and 1L-WS2. The NRET efficiency can be greatly enhanced by up to 73% for samples coated with CQDs of increasing surface nitridization.
研究领域:
纳米材料
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光电子学
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能量转移
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量子点
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二维材料
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2022
·Vol. 12
·期 9
·3718-3730
·
IF 3.074
Luyao Wang,Mingjin Liu,Biao Chen,Jie Pan,Shuyun Wang,Chao Zhang,Zhen Li,Qianqian Peng,Xianwu Xiu
Combing the merits of metals and semiconductors,with superior plasmon resonance effects and high charge mobility, 3D-nanocomposite structures consisting of graphene oxide (GO), noble metal nanostructures, and two-dimensional transition metal sulfides (2D-TMDS) are an important topic in surface-enhanced Raman scattering (SERS) research. This paper presents a novel GO/Ag NPs (silver nanoparticles)/WS2 composite SERS substrate, and electric field simulation by COMSOL software. The GO/Ag/WS2 composite substrate shows very high SERS detective sensitivity and stability to probe molecules such as rhodamine 6 g (R6G), crystal violet (CV), methylene blue (MB) and deoxyribonucleic acid (DNA). The SERS sensitivity can reach 10−12 M, the relative standard deviation (RSD) is 8.24%, and the enhancement factor (EF) is approximately 6.60 × 1010 for R6G, which promoted the implementation of the SERS technique in the area of quantitative profiling and testing.
研究领域:
材料科学
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光谱学
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纳米技术
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DOI
高影响因子
Tungsten
·
2019
·Vol. 1
·期 1
·101-109
·
IF 0
Zhang Xiangyong,Fei Hao,Wu Zhuangzhi,Wang Dezhi
Tungsten disulfide (WS 2 ) has been considered as a promising hydrogen evolution reaction (HER) candidate due to its high activity, robust chemical stability, and earth-abundant resources. However, the inert basal planes and low electrical conductivity greatly hinder its development in HER. Increasingly, the density of active sites through the structural designing is one of the most effective strategies to enhance the HER performance. Herein, we report a facile one-step hydrothermal method for synthesizing flower-like WS 2 nanosheets for highly efficient HER. Besides, the effect of preparation temperature is also been discussed. The optimized WS 2 nanosheets exhibit the enhanced HER activity in strong acidic solutions with a low Tafel slope and a good stability. The improvement of the HER performance can be attributed to sheet-like nanostructures, which greatly increase the edge sites and defects, resulting in a high density of exposed active sites. Besides, these sheet-like nanostructures also can make the acidic electrolyte easily accessible to the surface of WS 2 and accelerate the electron transfer rate.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Lun Yang,Xiaobin Zhu,Shijie Xiong,Xinglong Wu,Yun Shan,Paul K. Chu
Tungsten trioxide dihydrate (WO3·2H2O) nanoplates are prepared by in situ anodic oxidation of tungsten disulfide (WS2) film on carbon fiber paper (CFP). The WO3·2H2O/WS2 hybrid catalyst exhibits excellent synergistic effects which facilitate the kinetics of the hydrogen evolution reaction (HER). The electrochromatic effect takes place via hydrogen intercalation into WO3·2H2O. This process is accelerated by the desirable proton diffusion coefficient in the layered WO3·2H2O. Hydrogen spillover from WO3·2H2O to WS2 occurs via atomic polarization caused by the electric field of the charges on the planar defect or edge active sites of WS2. The optimized hybrid catalyst presents a geometrical current density of 100 mA cm–2 at 152 mV overpotential with a Tafel slope of ∼54 mV per decade, making the materials one of the most active nonprecious metal HER catalysts.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Jiapeng Liu,Huibin Liu,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Monolayer MoS 2 (WS 2 ) nanosheets have triggered tremendous interest due to their fascinating unique properties, but high-yield production of single-layer MoS 2 (WS 2 ) still remains an enormous challenge and of great interest. Herein, we report a facile efficient partial etching strategy to tailor thickness and lateral size of MoS 2 (WS 2 ) so as to increase the fraction of edges, which remarkably enhanced the yield of monolayer MoS 2 (20%) and WS 2 (12%) nanosheets by liquid phase exfoliation. As a proof of concept, the exfoliated monolayer MoS 2 (WS 2 ) nanosheets were applied as the cocatalysts for photocatalytic hydrogen evolution . Notably, the optimized hybrids exhibit excellent hydrogen evolution performance, which are over 31-fold (MoS 2 /CdS) and 47-fold (WS 2 /CdS) higher that of bare CdS counterpart, respectively. Hence, this work not only may pave the new way for the high-yield production of transition-metal dichalcogenides monolayers by liquid phase exfoliation, but also provide the possibility for the further efficiently exfoliating other two-dimension layered materials.
研究领域:
材料科学
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化学工程
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能源科学
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产品关联
DOI
高影响因子
Chemosensors
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2022
·Vol. 10
·期 10
·402
·
IF 4.229
Qiyilan Guang,Baoyu Huang,Jun Yu,Jianwei Zhang,Xiaogan Li
Tungsten sulfide decorated with indium oxide nanoparticles (In2O3/WS2) was studied for a chemiresistive-type NH3sensor at room temperature. It was found that the responses of the developed In2O3/WS2heterostructure nanocomposite-based sensors are significantly improved to 3.81 from 1.45 for WS2. The response and recovery time of the heterostructure-based sensor was found to significantly decrease to 88 s/116 s (10 ppm) from 112 s/192 s for the WS2-based one. The sensor also exhibits excellent selectivity and signal reproducibility. In comparison to WS2decorated with both ZnO and SnO2in similar ways, the In2O3-decorated WS2has overall better sensing performance in terms of sensitivity, selectivity and response/recovery speeds for NH3from 1 ppm to 10 ppm at room temperature. The improved sensing properties of WS2incorporating In2O3could be attributed to the joint enhancement mechanisms of the “electronic and catalytic” sensitizations.Keywords:WS2;WS2-In2O3;heterostructure nanocomposites;ammonia;gas sensor
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3487-3504
·
IF 2.5
Liu Cansen,Wu Xianhong,Xu Jianyu,Li Jinyan,Xie Huisi
Developing a coated metal mold to avoid scuff, corrosion, and fouling in rubber vulcanization condition remains challenging. Here, a composite coating is described which combines resistance to fouling, wear, and corrosion by incorporating low surface energy tungsten disulfide (WS 2 ) into a robust cobalt (Co) matrix for wear and corrosion resistance together with antifouling. The dispersity of WS 2 in the electroplating solution is improved by combining chemical modification with mechanical milling. The addition of 2 g/L WS 2 to the electroplating bath produced a Co-WS 2 composite coating with effective tribological and anticorrosion performance in 3.5 wt.% standing NaCl solution at 25 ℃ as well as superior antifouling behavior in rubber vulcanization conducted at 160 ℃ and 9.8 Mpa. Graphical Abstract
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2019
·
IF 6.35
Yangyang Wang,Xuemeng Li,Zhenning Su,Hao Wang,Hongqi Xia,Huanjun Chen,Jianhua Zhou
Single-particle (SP) sensing technology provides a methodology to explore the biochemical process in a micro/nanosize area (super-high resolution) with high sensitivity. Plasmonic nanoparticle is promising as a substrate for single-particle sensing. To realize specific sensing, a modification layer on the surface of the plasmonic nanoparticle is usually in need. However, a challenge stands in the way: the traditional coating of modification layer can deplete the highly enhanced electric field (EF) around the plasmonic particle and also, perhaps, hinder the analytes moving into the sensing hot spot with the most enhanced EF; thereby, the plasmonic particle cannot perform with super-high sensitivity. To solve this problem, we demonstrated an innovative single plasmonic particle sensing system in this work. In a convenient and controllable way, a single gold nanorod (AuNR) was successfully modified by monolayer WS2. There is an energy interaction between the AuNR and WS2, and thus, an exposed sensing hot spot with a nondepleted enhanced EF exists at the interface, which equips the as-prepared AuNR-WS2 SP with the ability to detect small changes in the local dielectric environment. Meanwhile, the monolayer WS2 also acted as a specific modification layer for detecting different analytes. We applied the AuNR-WS2 SP to explore the adsorption kinetics of different gas molecules, including ammonia, ethanol, and acetone for the first time. Through monitoring the scattering spectra under a microscope in dark-field, AuNR-WS2 SP could successfully differentiate the three small molecules, and help to explore the adsorption kinetics of them. Our experimental results were consistent with theoretical simulation in SP’s EF distribution and its scattering spectra under different dielectric environments. Additionally, this proposed interaction-based modification strategy was also applied to other plasmonic nanoparticles, such as Au@Ag nanocube and Au nanodisk, suggesting the universality of this innovative SP sensing system.
研究领域:
纳米技术
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光学
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材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Jun Wang,Dongzhi Zhang,Dongyue Wang,Zhenyuan Xu,Hao Zhang,Xiaoya Chen,Zihu Wang,Hui Xia,Haolin Cai
Flexible wearable pressure sensors have received increasing attention as the potential application of flexible wearable devices in human health monitoring and artificial intelligence. However, the complex and expensive process of the conductive filler has limited its practical production and application on a large scale to a certain extent. This study presents a kind of piezoresistive sensor by sinking nonwoven fabrics (NWFs) into tungsten disulfide (WS2) and Ti3C2Tx MXene solutions. With the advantages of a simple production process and practicality, it is conducive to the realization of large-scale production. The assembled flexible pressure sensor exhibits high sensitivity (45.81 kPa–1), wide detection range (0–410 kPa), fast response/recovery time (18/36 ms), and excellent stability and long-term durability (up to 5000 test cycles). Because of the high elastic modulus of MXene and the synergistic effect between WS2 and MXene, the detection range and sensitivity of the piezoresistive pressure sensor are greatly improved, realizing the stable detection of human motion status in all directions. Meanwhile, its high sensitivity at low pressure allows the sensor to accurately detect weak signals such as weak airflow and wrist pulses. In addition, combining the sensor with deep-learning makes it easy to recognize human respiratory patterns with high accuracy, demonstrating its potential impact in the fields of ergonomics and low-cost flexible electronics.
研究领域:
材料科学
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生物医学工程
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人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xu Han,Guoping Liu,Li Wu,Xiubo Min,Zhongsheng Wen
Due to the large ionic radius of Na⁺, sodium storage is often accompanied by sluggish ion transport and limited interfacial reaction kinetics, posing significant challenges for the development of high-performance sodium-ion battery electrode materials. To address these issues, a Co-modified WS 2 /rGO composite was constructed via a hydrothermal method combined with subsequent thermal treatment. The Co-WS 2 /rGO electrode delivers a reversible capacity of 283.5 mAh g -1 after 300 cycles at a current density of 2 A g -1 , along with favorable rate capability. Kinetic analyses reveal a higher surface-controlled contribution and lower charge-transfer resistance for Co-WS 2 /rGO compared with WS 2 /rGO. Operando electrochemical analyses further reveal reduced polarization and improved reaction reversibility during Na⁺ storage. These results demonstrate that Co modification combined with rGO incorporation is an effective strategy for improving the interfacial electrochemical kinetics and sodium-storage performance of WS 2 -based anodes. Download: Download high-res image (196KB) Download: Download full-size image
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiangfan Liao,Guoqiang Lv,Xianghua Zhao,Tao Zhou,Renjie Li,Qingrun Xie,Xiufeng Li,Mingli Xu,Yongsheng Ren,Wenhui Ma
Photoelectrochemical (PEC) water splitting represents a promising strategy for sustainable hydrogen production. The development of highly efficient photoelectrocatalysts that facilitate charge transport and minimize overpotential is therefore of great significance. In this work, a synergistic approach was employed by constructing a PCN/WS 2 heterojunction through electrostatic self-assembly and introducing sulfur vacancies via HF etching. The as-prepared PCN/WS 2 -Vs composite demonstrated outstanding HER performance: under illumination, the overpotential at 10 mA·cm −2 decreased from 157 to 73 mV, and the Tafel slope was reduced from 223 to 114 mV·dec -1 . Moreover, the optimized photocathode delivered an applied bias photon-to-current efficiency (ABPE) of 1.33 % and achieved a photocurrent density of 7.65 mA·cm −2 at 0 V (vs. RHE). Remarkably, the photocathode enabled stable continuous operation for 150 h under simulated solar irradiation. Spectroscopic characterizations (XPS, UV–vis, and EPR) confirmed band structure modulation, including a narrowed bandgap and a downward-shifted valence band, which collectively promoted efficient charge separation and transfer. These results highlight the synergistic contributions of p-n heterojunction formation and sulfur-vacancy engineering toward enhanced PEC-HER, offering an effective strategy for designing efficient, durable, and noble-metal-free photoelectrocatalysts.
研究领域:
材料科学
·
能量转换
·
光催化
·
电化学
·
纳米材料
✓ 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）