Inorganic Chemistry Frontiers
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2021
·Vol. 8
·期 23
·5006-5015
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IF 6.569
Ruozhen Wu,Juanyuan Hao,Tingting Wang,Shengliang Zheng,You Wang
The two-dimensional layered metal dichalcogenides (LMDs) SnS2 is an interesting candidate for high-performance NO2 gas sensors. However, most SnS2-based NO2 sensors are usually inert for detecting ppb-level NO2 at room temperature (RT) because of the intrinsic features of a large bandgap, poor conductivity, and lack of active sites. Herein, we successfully endowed SnS2 with ppb-level NO2 detection at RT by using a carbon (C)-doping strategy. Compared to the pristine SnS2 showing a negligible response toward NO2 at RT, the C-doped SnS2 exhibited an excellent response (481.3% for 1 ppm and 146.5% for 100 ppb) with full recovery. The sensitivity toward ppb-level NO2 was as high as 1200% ppm−1. Moreover, the experimental and theoretical limit of detection (LOD) were down to 10 ppb and 0.3 ppb, respectively. Such impressive gas-sensing performance of C-doped SnS2 at RT was due to the doping-mediated synergistic effect of energy-band modification and the presence of an S vacancy. The results provide a real solution for developing high-performance LMDs-based gas sensors.
研究领域:
材料科学
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传感器技术
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环境监测
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DOI
高影响因子
Catalysts
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2019
·Vol. 9
·期 11
·927
·
IF 3.444
Aiguo Han,Mei Li,Shengbo Zhang,Xinli Zhu,Jinyu Han,Qingfeng Ge,Hua Wang
In recent years, defective TiO2-based composite nanomaterials have received much attention in the field of photocatalysis. In this work, TiB2was used as a precursor to successfully prepare Ti3+defective TiO2(TiO2-B) with a truncated bipyramidal structure by a one-step method. Then, the SnS2nanosheets were assembled onto the as-prepared TiO2-B through simple hydrothermal reaction. TiO2-B exhibits strong visible light absorption properties, but the recombination rate of the photo-generated electron-hole pair was high and does not exhibit ideal photocatalytic performance. Upon introducing SnS2, the heterojunction catalyst SnS2-Ti3+defective TiO2(SnS2/TiO2-B) not only possesses the strong light absorption from UV to visible light region, the lowest photo-generated charge recombination rate but also achieves a more negative conduction band potential than the reduction potential of CO2to CO, and thereby, exhibits the significantly enhanced selectivity and yield of CO in photocatalytic CO2reduction. Notably, SnS2/TiO2-B produces CO at a rate of 58 µmol·h−1·g−1with CO selectivity of 96.3% under visible light irradiation, which is 2 and 19 times greater than those of alone TiO2-B and SnS2, respectively. Finally, a plausible photocatalytic mechanism on SnS2/TiO2-B was proposed that the electron transfer between TiO2and SnS2follows the Z-scheme mode. Our results present an effective way to gain highly efficient TiO2based photocatalysts for CO2reduction by combining different modification methods of TiO2and make full use of the synergistic effects.Keywords:photocatalytic CO2reduction;TiO2nanoplates;SnS2nanosheets;Ti3+defective TiO2
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
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2017
·Vol. 5
·期 8
·4075-4083
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IF 8.867
Qiang Chen,Fengqi Lu,Ying Xia,Hai Wang,Xiaojun Kuang
New conceptions of developing various nanostructure materials supported on conductive substrates are urgently required for additive-free integrated electrodes for lithium ion batteries (LIBs). In this work, Mo-doped SnS2-based nanosheets were directly grown on a conductive substrate, carbon cloth, via a facile hydrothermal method. Significantly, the as-synthesized samples possess a three-dimensional network structure consisting of interconnected nanosheets, which can be directly employed as additive-free integrated electrodes for LIBs. The as-obtained CC@Sn0.9Mo0.1S2 nanosheets exhibit initial high discharge and charge capacities of 2033.6 and 1869.8 mA h g−1 at a current density of 1 A g−1, with a coulombic efficiency of 91.9%. A high reversible discharge capacity of 1950.8 mA h g−1 is obtained after 200 cycles. Moreover, a high reversible capacity of 914.5 mA h g−1 is achieved even at a high current density of 5 A g−1, which significantly exceeds the theoretical capacity of commercial graphite and reversible capacity of SnS2. A full lithium ion battery was assembled composed of the CC@Sn0.9Mo0.1S2 anode and a commercial LiCoO2 cathode, which also delivered high capacity and cycling stability. The excellent electrochemical lithium storage performance of Mo-doped SnS2 could be attributed to the molybdenum doping, which limited the number of layers of the nanosheets, enlarged the interlayer spacing and generated rich defects.
研究领域:
材料科学
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电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Qingxi Zhai,Hurong Ji,Yilun Ren,Hao Wu,Biao Wang,Fengqi Li,Yujie Ma,Xiangkang Meng
Designing and synthesizing high-activity, durable, and low-cost catalysts for the electrochemically transformation of water to hydrogen are vitally important to future energy systems . Herein, a simple but effective strategy for manganese-metal-heteroatom doping is adopted to intrinsically elevate the electrocatalytic activities of SnS 2 nanosheets by a facile two steps hydrothermal-sulfurization approach. Electrocatalytic hydrogen evolution (HER) performance of Mn–SnS 2 nanosheets grown on 3D nickel foam (Mn–SnS 2 /NF) is efficiently optimized since the dopants and defects endow the Mn–SnS 2 /NF vast active sites. An overpotential as low as 71 mV is required to drive a current density of 10 mA/cm 2 with a low Tafel slope of 72 mV dec −1 in alkaline environment (1 M KOH). In addition, the Mn–SnS 2 /NF exhibits prominent stability in 1 M KOH electrolyte, which is an indispensable index for the potential HER electrocatalysts . The present work demonstrates that the heteroatom manganese doping strategy renders a meaningful route for synthesizing cost-efficient HER electrocatalysts in alkaline condition.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
·
IF 7.926
Kexin Lv,Hengcheng Wan,Qiang He,Yi Li
The shortage of fresh water resources has become an unavoidable problem in social and economic development. It is desirable and urgent to deal with the increasingly serious environmental pollution based on sustainable energy. Herein, we developed oxygen-injected SnS 2 (SnS 2−x O x ) nanosheets to acquire enhanced photocatalytic degradation performance on dye-containing wastewater. Mechanism studies proved that O atoms optimize the electronic structure of SnS 2 , which were further verified by density functional theory (DFT) calculation. As a result, SnS 2−x O x nanosheets exhibited that the typical dye removal efficiency reached at ∼93%, ∼91% and ∼85% toward RhB , GR and MB , respectively with worth stability. This work not only exploited a high degradation performance photocatalyst for water purification , but also lay a foundation for the atomic functionalization of photocatalysts.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
ChemPhotoChem
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2016
·Vol. 1
·期 2
·60-69
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IF 0
Erwei Huang,Xiaolong Yao,Weichao Wang,Guangjun Wu,Naijia Guan,Landong Li
Graphical The sides face off : SnS 2 nanoplates dominated by {101} or {100} exposed facets are successfully prepared through a simple hydrothermal method and their facet-dependent band-energy diagrams are confirmed by combining spectroscopic analysis and theoretical calculations. Accordingly, SnS 2 nanoplates dominated by different exposed facets exhibit quite different photo-catalytic behaviours in target reactions. A facile hydrothermal strategy is developed for the synthesis of SnS 2 nanoplates with specific exposed facets. The crystallographic structure and the specific exposed facets of as-prepared SnS 2 are confirmed by X-ray diffraction, Raman spectroscopy and TEM analysis, and the surface electronic state and the chemical composition of samples are investigated by X-ray photoelectron spectroscopy (XPS). The band gaps of SnS 2 nanoplates are directly measured from UV/Vis absorption spectra, and their detailed band alignments are determined by Mott–Schottky plots and ultraviolet photoelectron spectroscopy (UPS) analysis, which are well supported by DFT calculations. Significant transient photocurrent responses under visible-light irradiation from photoelectrochemical analysis reveal that SnS 2 samples are active and stable visible-light-driven photocatalysts and that SnS 2 nanoplates dominated by {101} exposed facets should be better photocatalysts than those dominated by {100} exposed facets. The photocatalytic activities of SnS 2 nanoplates are examined in two typical reactions, that is, rhodamine B (RhB) degradation and hydrogen production from water splitting. As expected, SnS 2 nanoplates dominated by {101} exposed facets exhibit distinctly higher activity than those dominated by {100} exposed facets in the photocatalytic RhB degradation. For hydrogen production from water splitting, SnS 2 nanoplates dominated by {101} exposed facets exhibit significant photocatalytic activity resulting from their suitable band edges to realize the photocatalytic redox reaction, in great contrast to the inactive SnS 2 nanoplates dominated by {100} exposed facets.
研究领域:
材料科学
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化学
✓ 已验证
DOI
ACTA MATERIALIA
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2014
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IF 3.94
Renjie Wei,Juncheng Hu,Tengfei Zhou,Xianlong Zhou,Jinxiong Liu,Jinlin Li
Hierarchical tin disulfide (SnS 2 ) micro/nanostructures, assembled from ultrathin nanosheets with {0 0 1} facets exposed, were successfully synthesized via an l -glutatione-assisted approach. The prepared materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy , infrared spectra and UV–visible diffuse reflectance spectroscopy . The characterized results showed that these hexagonal berndtite SnS 2 nanosheets selectively exposed {0 0 1} facets as the main external surfaces, and the percentage of these facets was nearly 95%. Even under visible light ( λ > 420 nm), the products showed superior photocatalytic activity for the degradation of dye (methyl orange) and the reduction of aqueous Cr (VI). The enhanced photocatalytic properties can be attributed to the two-dimensional sheet-like nanostructure, which has a larger specific surface area and could enhance the efficiency of the electron–hole separation. The formation mechanism of the hierarchical SnS 2 micro/nanostructures and its relationship with photocatalytic properties were also proposed. The result demonstrates that these hierarchical SnS 2 micro/nanostructures have promising applications in the solar-energy conversion process.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Yang Lu,Jiafeng Zhang,Wei Wang,Yizhuo Fan,Caixia Liu,Jingran Zhou,Dali Liu,Shengping Ruan
Two-dimensional metal sulfide semiconductor materials have received a lot of attention recently due to their large surface-to-volume ratio, outstanding chemical properties, and suitable band gap, and possess the potential in the application of gas sensors. In this work, SnS 2 nanosheets were synthesized by a simple hydrothermal method and successfully modified with Au, Pd, and Au-Pd nanoparticles on their surfaces using reducing agents for xylene detection. The experimental results show that the gas-sensitive performance of the sensor can be significantly improved by modifying Au-Pd nanoparticles on the surface of SnS 2 nanosheets , which can be attributed to the synergistic effect of the bimetal and the catalytic properties of bimetallic systems. The response of the prepared sensor is more than ten times higher than that of the pure material. In addition, the optimal operating temperature of the sensor modified by Au-Pd nanoparticles was also decreased compared to that of the sensor prepared by SnS 2 . The outstanding performance makes Au-Pd nanoparticles-modified SnS 2 gas sensor a great potential candidate for xylene detection.
研究领域:
材料科学
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传感器技术
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化学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
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2018
·Vol. 148
·期 7
·1990-2000
·
IF 2.911
Zhang Kai,Zhang Yunhai,Zhang WanJu
Abstract A kind of 2D/2D heterojunction photocatalysts was constructed by a facile in situ hydrothermal method that a tetragonal CuInS 2 nanosheets was horizontal loaded in ultrathin hexagonal SnS 2 nanosheets. Contrasted to pure CuInS 2 and SnS 2 nanosheets, the CuInS 2 /SnS 2 nano-heterojunctions revealed a noteworthy improvement photocatalytic activity under visible light irradiation for the degradation of organic dyes, which should be attributed to the narrowest band gap and the efficient charge separation and transfer improving the contact region in heterojunction interface. Especially, with 0.5 wt% addition of CuInS 2 , the heterojunction nanosheets shows a supreme visible-light photocatalytic activity and a superb degradation efficiency which reached 99% in 60 min with the solution of methyl orange. Moreover, CuInS 2 /SnS 2 nano-heterojunctions deliver excellent reusability in five degradation–regeneration cycles. The results indicated that CuInS 2 /SnS 2 has a promising prospect in organic pollutant treatment due to high efficiency and excellent stability. Graphical Abstract
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 8
·1122
·
IF 4.034
Feier Fang,Henan Li,Huizhen Yao,Ke Jiang,Zexiang Liu,Congjian Lin,Fuming Chen,Ye Wang,Lai Liu
Two-dimensional (2D) metal dichalcogenides have attracted considerable attention for use in photoelectric devices due to their unique layer structure and strong light-matter interaction. In this paper, vertically grown SnS2nanosheets array film was synthesized by a facile chemical bath deposition (CBD). The effects of deposition time and annealing temperature on the quality of SnS2films was investigated in detail. By optimizing the preparation conditions, the SnS2array film exhibited efficient photoelectric detection performance under sunlight. Furthermore, in order to improve the performance of the photodetector based on SnS2nanosheets film, a transparent graphene film was introduced as the hole-transport layer by wet-chemical method directly transferring techniques. Graphene/SnS2nanosheets array film heterojunction photodetectors exhibit enhanced photoresponsivity. The light on/off ratio of the photodetector based on graphene/SnS2was 1.53, about 1.4 times higher than that of the pristine SnS2array films. The improved photoresponse performance suggested that the effective heterojunction between vertical SnS2nanosheets array film and graphene suppresses the recombination of photogenerated carriers. The results indicate that the graphene/SnS2heterojunction photodetectors have great potential in photodetection devices.Keywords:graphene/SnS2heterojunction;charge separation;photodetectors
研究领域:
材料科学
·
光电子学
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Pengwei Hao,Fumin Ma,Guanjie Lu,Tongtong Deng,Shikuan Sun,Chaohe Xu
Three-dimensional and interconnected SnS 2 nanosheet arrays in-situ growth on carbon-cloth is constructed as highly stable and sodiophilic host for development of CC@SnS 2 @Na composite anode. The synergistic effect of the mesoporous SnS 2 nanosheet arrays and the CC framework ensures a sodiophilic characteristic, reduces localized current density and suppress volume variation, which guarantee a uniform Na + plating/stripping and ideal compatibility with different electrolyte. Excellent cycling stability of the CC@SnS 2 @Na composite anode across varying current densities is revealed with a significantly lower overpotential compared to bare sodium electrodes. More impressively, the full battery coupled with Na 3 V 2 (PO 4 ) 3 cathode and CC@SnS 2 @Na anode manifests ultrafast charge-discharge capability and exceptional cycling stability even under harsh conditions of high current density and low temperatures: 3500 cycles at an ultra large rate of 50C (equivalent to a charging time of only 1.2 min), 94.6 % capacity retention after 1200 cycles at −20 °C, demonstrating a favorable reaction kinetics and stable anode/electrolyte interface. Moreover, the NVP || CC@SnS 2 @Na pouch battery also delivers a high capacity with outstanding cycling stability (90.4 % capacity retention after 200 cycles at 1 C). Such satisfactory performance of CC@SnS 2 @Na anode under harsh conditions lays a solid foundation for its practical applications in high energy density batteries.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Rongzhong Wang,Yaqian Zhang,Xuemei Sun,Qingyan Zhang,Zhaowen Cheng,Wenjing Xue,Qingyi Zeng
Resourceful treatment of wastewater is a promising way to facilitate sustainable development. Recently, photocatalytic fuel cells (PFCs) have attracted widespread attention as the method that can synchronously achieve wastewater treatment and clean energy production only depend on light. However, few PFCs focused on treating complex uranium (U(VI))-organic wastewater. This study prepared a SnS 2 nanoplate decorated carbon felt (SnS 2 /CF) material by facile hydrothermal method and used as the cathode to construct a hybrid tandem photocatalytic fuel cell (HTPFC) system. Compared to the CF-HTPFC, the removal efficiencies of U(VI) and tetracycline hydrochloride (TCH) increased to 3.4 and 1.8 times in the SnS 2 /CF-HTPFC system, accompanied with the reaction rate ( k obs ) values increased to 30.39 and 3.78 times, respectively. More importantly, under real sunlight irradiation (From 10:00 to 16:00), the removal efficiencies of U(VI) and TCH respectively reached 92.49 % and 97.96 %, and the P max reached 6.49 mW·cm −2 . HTPFC also displayed satisfactory performances in treating r adioactive wastewater containing different organic compounds, with the removal efficiencies of U(VI) and organic compounds both exceeded 93.35 %. The loading of SnS 2 nanoplates enhanced electrochemical performance and introduced abundant S active sites, allowing more U(VI) to be adsorbed and reduced, and simultaneously promoting the removal of organic matter by improving the charge separation efficiency.
研究领域:
环境科学
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材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）