Chemistry-An Asian Journal
·
2026
·Vol. 21
·期 17
·e70895
·
IF 3.2
Zhe Wang,Tang Tang,Jianpei Feng,Haihang Tong,Chun Hong Mak,Adel Zrelli,Alvaro Muñoz-Castro,Ji-Jung Kai,Carol Sze Ki Lin,Patrick H.-L. Sit,Hsien-Yi Hsu
Metal halide perovskites have exhibited considerable potential for solar-driven photocatalytic CO 2 reduction, yet their practical application is largely hindered by lead toxicity and severe charge recombination. In this work, we report the synthesis and screening of lead-free halide double perovskite Cs 2 AgBiX 6 (CABX, X = Cl, Br, I) nanocrystals via an antisolvent technique, followed by the construction of Cs 2 AgBiX 6 @WS 2 (CABBWS) composites with varying WS 2 contents (25, 50, 75 mol%). Structural and interfacial characterizations confirm the intimate contact between CABB particles and WS 2 nanosheets, while photophysical and photoelectrochemical (PEC) analyses demonstrate the optimal CABBWS50 with superior charge separation properties. The CABB-WS 2 intimate interface enhances charge transport by reducing activation energy, as evidenced by temperature-dependent TRPL measurements. The optimal CABBWS50 achieves a CO evolution rate of 13.65 µmol g − 1 h − 1 under visible-light irradiation ( λ > 420 nm), approximately 3.7 times higher than pristine CABB. This work provides comprehensive insights into the design of high-performance lead-free perovskite photocatalysts via rational halogen engineering and interfacial regulation, offering a promising strategy for solar fuel production toward carbon neutrality.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haoqi He,Wenyun Guan,Mingchuang Zhao,Jianxiang Gao,Xudong Liu,Yichao Bai,Yu Lei
Molecular sensing is of great importance in the field of food safety, as food safety constitutes the fundamental baseline for safeguarding public health. However, the application of surface-enhanced Raman spectroscopy (SERS) in this domain remains challenging due to significant fluctuations in signal intensity when low-concentration harmful additives are detected in food samples. To address this, we propose a digital SERS approach based on a two-dimensional (2D) flat WS2 monolayer and Poisson distribution statistics. This method utilizes a plasma-treated WS2 monolayer as a highly sensitive SERS substrate and was validated through the digital SERS detection of crystal violet (CV) in both single and mixed solutions. The results demonstrate that the detection limit for CV can reach as low as 1 × 10–18 M, with no interference observed in mixed solutions, indicating excellent quantitative detection capability. Furthermore, this strategy was applied to detect synthetic colorants in black tea, where it also exhibited outstanding sensitivity and accuracy. Specifically, the limits of detection for sunset yellow and erythrosine are 10–14 M and 10–18 M, respectively. In summary, by combining a highly uniform 2D SERS substrate with digital SERS technology, this study not only expands the application scope of 2D SERS substrates but also enhances their potential for the high-precision and efficient quantitative analysis of multiple analytes in complex food samples.
研究领域:
食品安全
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分析化学
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纳米材料
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传感器
·
二维材料
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Pu Zhang,Pengcheng Zhu,Fukang Zhang,Yihao Wang,Wentao Zheng,Dongjuan Liu,Yanchao Mao
Two-dimensional transition metal disulfides are considered a great candidate for non-noble metal catalyst because of their abundant reserves and excellent electrochemical activity in hydrogen evolution reaction (HER). Herein, two-dimensional (2D) few-layer WS 2 nanosheets were synthesized via a facile liquid phase stripping technique. The piezoelectricity of the synthesized WS 2 nanosheets was verified by piezoelectric force microscope (PFM) and used to promote the piezo-catalytic hydrogen generation, where the piezoelectric charges generated under ultrasound vibration are utilized for hydrogen evolution. Moreover, the effect of various mechanical vibration conditions on the piezo-catalytic HER of WS 2 was also discussed. The results show that under the same overpotential, the hydrogen production rate with ultrasound vibration (40 kHz, 40 W) is 6 times higher and the impedance is 4 times lower than that without ultrasound. The catalytic efficiency of WS 2 can be significantly increased through this method, which paves the way towards non-noble metal HER catalysts to produce hydrogen with aid of piezoelectricity.
研究领域:
材料科学
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电化学
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Jian-Ping Zou,Jun Ma,Jin-Ming Luo,Jian Yu,Junkai He,Yongtao Meng,Zhu Luo,Shao-Kui Bao,Hui-Long Liu,Sheng-Lian Luo,Xu-Biao Luo,Tong-Cai Chen,Steven L. Suib
Novel heterostructured composite of few layered WS 2 -Bi 2 WO 6 /Bi 3.84 W 0.16 O 6.24 has been synthesized via a facile hydrothermal method for the first time. The obtained catalysts were systematically characterized by X-ray diffraction (XRD), SEM, TEM, EDS, Raman spectroscopy, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) to certify the existence of WS 2 with a few-layered structure among the heterostructured composite, and to illuminate the relationship of its performance and the structural features. Among the as-prepared catalysts, the few layered WS 2 -Bi 2 WO 6 /Bi 3.84 W 0.16 O 6.24 composite show the best photocatalytic degradation of RhB under visible light irradiation. The enhanced photocatalytic performance of the heterostructured few layered WS 2 -Bi 2 WO 6 /Bi 3.84 W 0.16 O 6.24 composite is attributed to the two-dimensional structure of WS 2 with special properties and the matching energy band structure for efficient separation of photogenerated electron–hole pairs. The formation mechanism and photocatalytic mechanism were proposed. The present work firstly combined layered TMDs with composites to prepare ternary heterostructured catalysts, which provide new ideas for obtaining novel layered TMDs-based composites with excellent performance.
研究领域:
材料科学
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环境科学
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Jia Wan,Qinqin Chen,Wang Li,Linhai Pan,Zehua Zhao,Dongdong Yu,Zhihong Tang,Haiyong He
Transition metal dichalcogenides (TMDs) have shown potential as anodes in lithium-ion batteries (LIBs) due to high specific capacity. However, low conductivity and long diffusion distance in layered structure limited their electrochemical performance. Here, a feasible method was reported to assemble few-layer WS 2 into mesoporous structure using carbon as a glue to create plenteous pseudocapacitive sites. In this way, the contribution of pseudocapacity in electrochemical process was dramatically increased. As a result, the specific capacity of WS 2 reached 754 mA h g −1 at 500 mA g −1 after 120 cycles, double of theoretical value. The rate capability is also improved due to the high speed of pseudocapacitive reaction. Thus, the retention of specific capacity is enhanced from 47.6% to 63.2%, as current density is increased from 0.1 to 2 A g −1 .
研究领域:
材料科学
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能源存储
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2022
·
IF 5.204
Xiao-Lu Pu,Song Gu,Yan-Fang Xiao,Yu-Zhong Wang,Li Chen
By noncovalently surface-modifying 2D WS 2 nanosheets (WC) with in situ generated iron ethylenediamine tetramethylene phosphonate (FeP), novel organophosphonate-decorated nanosheets (WC@FeP) were designed and prepared. Combining the physical barrier effects of WC nanosheets with the catalytic charring activity of FeP, WC@FeP improved the flame retardancy of the epoxy resin (EP), including heat inhibition and smoke suppression. Compared with those of neat EP, the EP composites containing 8 wt% of the WC@FeP (EP/8WC@FeP) passed a UL94 V-0 rating with a LOI value increased from 22.5 to 29.5 vol%. Furthermore, the peak heat release rate (PHRR), total heat release rate (THR), and total smoke release (TSP) of EP/8WC@FeP were remarkably reduced by 58.2%, 25.1%, and 44.5%, respectively. In addition, thanks to the large aspect ratio of the decorated nanosheets with flexible-but-tough nature, WC@FeP effectively enhanced the mechanical properties of the composites, in which the tensile strength and modulus of EP/8WC@FeP were enhanced by 23% and 24%, respectively, without sacrificing the toughness. Taking advantage of these features, the surface organo-decoration of 2D nanosheets broadens their applications in polymeric materials.
研究领域:
材料科学
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化学工程
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高影响因子
Journal of the Australian Ceramic Society
·
2022
·Vol. 59
·期 1
·179-185
·
IF 1.741
Liu Yupu,Wang Shu,Yin Jianan,Li Xin
Based on the construction of type II heterojunction, the one-pot hydrothermal method was employed to synthesize Fe 2 O 3 /WS 2 composites with flower-like structures, which performed significant photocatalytic activities compared with the bare components. The systemic characterizations were employed to reveal the type II heterojunction photogenerated electron transfer mechanism and they further illustrated the path for electron–hole transfer and separation under the effect of heterojunction. Afterward, the photocatalytic properties of the catalysts were evaluated by degrading organic methylene blue and toxic Cr (VI) under simulated solar-driven irradiation. Among those, the best high-efficiency Fe 2 O 3 /WS 2 photocatalyst (2WF) displayed significant photocatalytic properties on pollution degradation in detail, with the Cr (VI) photoreduction rate of 0.35 μmol·min −1 ·g −1 cat. and the MB photooxidation rate of 0.27 μmol·min −1 ·g −1 cat. , respectively. The designed photocatalysts have integrated the three aspects of photocatalytic efficiencies, including the visible light response, prolonged photogenerated carrier lifetime, and sufficient surface active sites due to the amount of surface defects, therefore, this work provides more insights into the utilization of green energy for environmental treatment by heterostructured catalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Fei-fei Wang,Lan Xu,Ping Wang,Yan Zhang
Developing highly-efficiency, cost-effective, high-throughput and durable bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is of paramount important for water splitting. Herein, we report an economical method for the synthesis of WS 2 /Co 9 S 8 core-shell nanoparticles arrayed on hollow-porous carbon fiber (WxCoyS@HCF) via simple electrospinning method and followed by calcination . The WxCoyS@HCF catalysts exhibited pronounced electrocatalytic activity and remarkable stability in electrolyte solution . The excellent electrocatalytic activities can be attributed to the best synergetic effect of appropriate molar ratio of WS 2 and Co 9 S 8 as well as the hollow-porous structure can provide more potential implantation sites.
研究领域:
材料科学
·
电化学
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yihong She,Zhen Wu,Shengdong You,Quan Du,Xiaohong Chu,Lijuan Niu,Changchun Ding,Kenan Zhang,Lijie Zhang,Shaoming Huang
Two-dimensional (2D) heterojunctions have attracted great attention due to their excellent optoelectronic properties. Until now, precisely controlling the nucleation density and stacking area of 2D heterojunctions has been of critical importance but still a huge challenge. It hampers the progress of controlled growth of 2D heterojunctions for optoelectronic devices because the potential relation between numerous growth parameters and nucleation density is always poorly understood. Herein, by cooperatively controlling three parameters (substrate temperature, gas flow rate, and precursor concentration) in modified vapor deposition growth, the nucleation density and stacking area of WS2/Bi2Se3 vertical heterojunctions were successfully modulated. High-quality WS2/Bi2Se3 vertical heterojunctions with various stacking areas were effectively grown from single and multiple nucleation sites. Moreover, the potential nucleation mechanism and efficient charge transfer of WS2/Bi2Se3 vertical heterojunctions were systematically studied by utilizing the density functional theory and photoluminescence spectra. This modified vapor deposition strategy and the proposed mechanism are helpful in controlling the nucleation density and stacking area of other heterojunctions, which plays a key role in the preparation of electronic and optoelectronic nanodevices.
研究领域:
材料科学
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纳米技术
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光电子学
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凝聚态物理
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化学气相沉积
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 55
·49668-49674
·
IF 3.289
Bo Feng,Xiaojia Liu,Yizhi Zheng,Qian Xiao,Na Wu,Suiping Wang
The air-stable doping of transition-metal dichalcogenides is important in enabling a wide range of optoelectronic and electronic devices while exploring basic material properties. In this work, we develop for the first time a simple, low-cost synthesis route to preparing boron-and-nitrogen-doped WS2 (B, N-WS2) nanosheets. Bulk WS2, a prototypical transition-metal chalcogenide material, is an indirect band-gap semiconductor with negligible photoluminescence. The obtained B, N-WS2 nanosheets exhibited enhanced fluorescence. The B, N-WS2 nanosheets can be used as a green and easy sensing platform for the label-free detection of Hg2+ because of the high sensitivity and selectivity toward Hg2+. Detection can also be easily accomplished through a rapid, one-step (within 1 min) operation, with a limit as low as 23 nM (S/N = 3).
研究领域:
材料科学
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纳米技术
·
分析化学
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环境监测
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhong Dong,Xu Wu,Mengying Chen,Hanxiao Chen,Ke-Jing Huang,Lingling Wang,Jing Xu
Pure phase MoS 2 has low conductivity, but with high theoretical specific capacity, and WS 2 possesses a high intrinsic conductivity, but suffer from rapid capacity fading. Predictably, the combination of these two transition metal sulfide compounds can complement each other and improve electrochemical performance comprehensively. Whereas, bimetallic phase sulfide of MoS 2 and WS 2 composites have not been researched in SIBs . In this paper, 1T metallic phase MoS 2 and WS 2 vertically growth on flexible carbon cloth (CC) surface (1T-MoS 2 @WS 2 @CC) by a simple hydrothermal method. The electrochemical performance was improved by heterojunction synergistic effect and the enhanced interlayers of the composite material. Specifically, the superelevation reversible capacity of 529.4 mAh/g can be obtained even after 100 cycles at the current density of 100 mA g −1 , and the 259.2 mAh/g capacity can be maintained even at high current density of 1000 mA g −1 after 60 cycles. Besides, the designed 1T-MoS 2 @WS 2 @CC composite material has excellent rate performance and cycle stability which are guarantee for battery core performance. Thus, there is every reason to believe that the advanced 1T-MoS 2 @WS 2 @CC electrode material has great potential in the future high performance energy storage devices.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Qinan Zhou,Luyi Zhu,Chengyu Zheng,Jun Wang
We have developed a tungsten disulfide (WS2)/multiwall carbon nanotubes (MWCNTs) nanocomposite based QCM gas sensor for (trimethylamine) TMA gas sensing of low concentrations. WS2/MWCNTs nanocomposite was synthesized via the hydrothermal method and was characterized for surface morphology, nanostructure, thermal stability, and elementary composition. The TMA-sensing properties of WS2/MWCNTs nanocomposite based QCM sensor were investigated. The composite based QCM sensor showed faster response time, strong response amplitude, good gas capacity, and good selectivity and stability compared with as prepared WS2 and MWCNTs-1 based QCM sensor. The response time of WS2/MWCNTs based QCM sensor was 294.1 and 142.9 s shorter than WS2 and MWCNTs-1 for 500 ppb TMA gas. And the response of the WS2/MWCNTs based QCM sensor was almost stable over 40 days, and the limit of detection (LOD) was 76 ppb calculated by the ICH method. This was ascribed to the fact that MWCNTs provided a skeleton for the growth of WS2 nanosheets and avoided agglomeration. The special structure could not only improve the structure ability but also expose more active adsorption sites. In order to further investigate the adsorption mechanism of the TMA molecule on (pure/functionalized) WS2 materials, density functional theory (DFT) calculations based on first-principle were conducted in the Vienna Ab-initio Simulation Package under ideal conditions.
研究领域:
材料科学
·
传感器技术
·
气体检测
·
理论计算
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）