Journal of Materials Chemistry C
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2024
·
IF 5.7
Sheng Ding,Wei Gan,Jun Guo,Ruixin Chen,Run Liu,Ziwei Zhao,Jianrou Li,Zhaoqi Sun,Miao Zhang
In this study, the S-scheme heterostructure photocatalyst of SnS2/TiO2 (denoted as ST) ultrathin nanosheet-nanorod arrays with high efficiency for the degradation of tetracycline hydrochloride (TC-HCl) was successfully prepared by a two-step hydrothermal method. By expanding the light absorption area and hindering the reorganization of light-generated e--h+ pairs, the binding of TiO2 to SnS2 prepared photocatalysts with highly efficient photocatalytic activity and long-term stability. The results showed that the optimized photocatalyst samples all contributed to the degradation efficiency of tetracycline hydrochloride within 90 min than the photocatalytic degradation of pure TiO2 (41.1%). Among them, the ST loaded with 30 mM SnS2 exhibited the highest photocatalytic degradation efficiency of TC-HCl (93.4%). The reaction rate constant K is 0.02597 min-1, and the transient photocurrent density of ST-30 was up to 34.35 A/cm2, which were 5.78 and 10.54 times higher than that of unmodified TiO2. At the same time, the effects of photocatalysts on the degradation efficiency of TC-HCl under different conditions (pH values, inorganic anions and antibiotic concentrations) were systematically investigated. The inhibition of the degradation efficiency of tetracycline hydrochloride by SnS2/TiO2 heterojunction with the addition of different free radical scavengers indicated that ·O2- and ·OH were the main active substances involved in the degradation process. In addition, two environmentally friendly degradation pathways were proposed based on the analysis of liquid chromatography-mass spectrometry (LC-MS) results and the toxicity assessment of various intermediates in the degradation process. Finally, the photocatalytic mechanism of SnS2/TiO2 heterojunctions was proposed based on the optical and electrochemical properties of the photocatalysts as shown in the tests. These results indicate that the synthesized S-scheme heterostructure photocatalyst SnS2/TiO2 can significantly improve the light trapping ability and reduce the photoelectron-hole complexation rate, which is a promising approach to enhance the degradation efficiency of photocatalysts.
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
Small
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2024
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IF 13
Jinnong Wang,Ze Wang,Jie He,Lin Han,Xin Li,Keyi Han,Tianen Chen,Qianyu Zhou,Luobai Yang,Dongye Zhao,Yuanhao Wang,Shifeng Wang
Photo-assisted electrocatalysis has arisen as a promising approach for hydrogen generation by incorporating photocatalysts into electrocatalysts. 2D SnS 2 is a photocatalyst that absorbs visible light. However, the rapid recombination of photo-generated electron-hole pairs significantly reduces the overall photocatalytic efficiency of SnS 2 , limiting its practical application. Thus, this study prepares an in situ heterojunction SnS 2 @SnO 2 using a one-step hydrothermal method. The degradation efficiency of methyl orange (MO) using SnS 2 @SnO 2 is measured, achieving a degradation rate of 92.75% within 1 h, which is 1.9 times higher than that of pure SnS 2 . Additionally, FeNiS/SnS 2 @SnO 2 is synthesized and exhibited significant improvements in the photo-assisted oxygen evolution reaction (OER). It achieves an overpotential of 260 mV and a Tafel slope of 65.1 mV dec −1 at 10 mA cm −2 , showing reductions of 11.8% and 31.8%, respectively, compared to FeNiS alone. These enhancements highlight the strong photo-response capability of SnS 2 @SnO 2 . Under the internal electric field of SnS 2 @SnO 2 , the photogenerated electrons in the conduction band of SnS 2 quickly move toward SnO 2 , facilitating efficient photocatalytic reactions. FeNiS, with a lower Fermi energy level (E F ), facilitates electron transfer from SnS 2 @SnO 2 and enhances OER performance by efficiently participating in the reaction. This study paves a new path for 2D photocatalyst materials.
研究领域:
材料科学
·
光电催化
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Gaoning Fan,Weishuai Duan,Mengjiao Dong,Xueting Luo,Pengyu Zhou,Chun Sun,Yonghui Zhang,Mengjun Wang,Chao Fan
As a member of two-dimensional materials, tin disulfide (SnS2) holds great potential for highly sensitive detectors used in high-resolution, low-power imaging. Nevertheless, SnS2-based detectors face challenges, such as a narrow detection range, low responsivity, and slow response speed. In this work, gate-modulated phototransistors based on a tin monoselenide/tin disulfide (SnSe/SnS2) heterostructure were fabricated, demonstrating a spectral response from visible to near-infrared. The phototransistors exhibited a maximum responsivity of 2667.1 A W−1 and an extremely high detectivity of 1.02 × 1013 cm Hz1/2 W−1 under 405 nm illumination. Additionally, they exhibited an extremely high responsivity of 537.6 A W−1 and a high external quantum efficiency of 78.3 × 104% under 850 nm illumination. The photodetection performance could be modulated by the back-gate voltage. At a back-gate voltage of 50 V, the phototransistor achieved an enhanced responsivity of 4002.9 A W−1, surpassing detectors based on individual components and most other two-dimensional materials. This work provides an effective strategy for achieving gate-modulated photodetection performance and broadens the scope of applications for SnS2-based detectors.
研究领域:
材料科学
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光电子学
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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
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光电子学
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产品关联
DOI
PubMed
高影响因子
OPTICS AND LASER TECHNOLOGY
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2025
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IF 5
Fengtong Zhu,Kun Liu,Jianying Jing,Lu Xiao,Xiaohan Zhan,Jinchang Liu,Yiyang Xiong,Junfeng Jiang,Tianhua Xu,Shuang Wang,Tiegen Liu
A SnS 2 -polydopamine (PDA) enhanced nearly guided-wave surface plasmon resonance (NGW-SPR) refractive index (RI) probe with high sensitivity and high-resolution has been proposed. For the first time, we systematically analyze the high-resolution demodulation methods for the optical fiber SPR sensor in terms of the wavelength resolution of the sensing system, rather than the spectrometer parameter. The sensor resolution is improved by increasing the sensor sensitivity and reducing the standard deviation of the resonance wavelength monitoring values. Taking advantage of the popular thermoelectric material SnS 2 with high carrier mobility and PDA with mussel adhesion properties, the composite material SnS 2 -PDA can effectively improve the sensitivity of the RI probe. To ensure accurate and high-resolution extraction of the SPR resonance wavelength, a wavelet packet denoising demodulation algorithm based on the self-calibrating polynomial fitting is developed. Experimental results demonstrate that the average sensitivity of the proposed RI probe achieves up to 3191.61 nm/RIU within the range of 1.3330 ∼ 1.3560 RIU. The probe offers a resolution of 3.47 × 10 −5 RIU, which is 1 ∼ 2 orders of magnitude higher than previously reported RI sensors. The proposed high-resolution NGW-SPR RI probe provides a new idea for the detection of small molecules interaction analysis with low limit of detection (LOD) in biochemistry.
研究领域:
光学传感器
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材料科学
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生物化学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2016
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IF 7.354
Yongcai Zhang,Fen Zhang,Zhanjun Yang,Huaiguo Xue,Dionysios D. Dionysiou
This work reports the development of a new efficient visible-light-driven composite photocatalyst comprising SnS 2 nanoflakes and conjugated polymer (CPVC) from the dehydrochlorination of polyvinyl chloride (PVC). The optimum synthesis conditions were explored to obtain the most efficient SnS 2 /CPVC composite photocatalyst. The formation of SnS 2 /CPVC nanocomposites was confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, high-resolution transmission electron microscopy, and elemental mapping characterization. The photocatalytic tests demonstrated that SnS 2 /CPVC nanocomposites exhibited not only far higher visible-light-driven photocatalytic activity than SnS 2 nanoflakes, but also good photocatalytic stability and reusability in the reduction of aqueous Cr(VI) under visible-light ( λ > 420 nm) irradiation. The mechanism underlying the improved photocatalytic efficiency of SnS 2 /CPVC nanocomposites was elucidated, based on comparison between the optical, photoelectric, and electrochemical properties of SnS 2 /CPVC nanocomposites and SnS 2 nanoflakes, as well as the matched electronic band structures between SnS 2 and CPVC.
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
NANOTECHNOLOGY
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2020
·Vol. 31
·期 39
·395401
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IF 3.551
Peng Zhang,Yang Liu,Min Zhou,Yuxiong Xue,Xianghua Zeng,Junlei Qi,Minghua Chen,Fenglian Sun
Nanostructured transition metal sulfides are promising anode materials for lithium-ion batteries. Nevertheless, it is still a great challenge to prepare capacity-improved electrodes without reducing their rate capability and cycle stability. In this paper, we present a C/Co9S8@SnS2 composite material by loading SnS2 nanocrystals onto MOF-derived C/Co9S8 nanostructures. The C/Co9S8@SnS2 composite has multiple active sites to store lithium ions. The specific capacity reaches 3.1 mAh cm−2 when the current density is 0.224 mA cm−2. The asynchronous electrochemical reaction between Co9S8 and SnS2 offsets the volume expansion of the anode material. Meanwhile, the compact adhesion of carbon layers on the interfaces suppresses the destruction of the anode during the charging–discharging processes. Consequently, the synthesized electrode presents favorable capacity with high current density or under long-term cycling conditions. The prepared battery has a reversible specific capacity of 0.452 mAh cm−2 and a coulomb efficiency of 99.7% after 500 cycles with a high current density of 2.24 mA cm−2. The research results obtained in this work provides a feasible strategy to improve the performance of electrodes systematically.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2020
·Vol. 8
·期 6
·3300-3310
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IF 11.301
Shundong Guan,Xiuli Fu,Bo Zhang,Ming Lei,Zhijian Peng
As a new type of electrochemical energy storage system, aqueous battery–supercapacitor hybrid (BSH) devices are attracting increasing interest due to their high energy and power density, high security, and low cost. Herein, hierarchical NiS/SnS2 heterogeneous nanowall arrays on carbon cloth (NiS/SnS2@CC) are synthesized via a simple cation-exchange method using SnS2@CC as the precursor. Benefiting from the maximum use ratio of the active materials and the synergistic effects between the SnS2 core and the NiS shell, NiS/SnS2@CC delivered an ultrahigh specific capacity of 430.38 mA h g−1 at a current density of 2.5 mA cm−2 (1.16 A g−1) with excellent rate capability of 185.08 mA h g−1 at a very high current density of 40 mA cm−2 (23.26 A g−1) and satisfactory cycling stability (82.6% of capacity retention after 1000 cycles). Moreover, all-solid-state BSH devices could be assembled using NiS/SnS2@CC as the battery-type cathode and Fe2O3/rGO@CC as the supercapacitor-type anode. With a maximum working voltage of 1.6 V, such a device exhibited a very high energy density of 104.23 W h kg−1 at a power density of 301 W kg−1 with excellent cycling stability and flexibility. This rational design and preparation strategy may provide new insight into the development of high-performance electrode materials for electrochemical devices.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xinyu Hu,Juntao Wang,Jing Wang,Kehui Xue,Ting Yang,Yi Peng,Ying Yan,Hongbo Xiao,Wenlei Wang
Controlling the migration behavior of photogenerated carriers by designing the microstructure of materials remains a significant challenge. In this work, the solvothermal method was used to fabricate a SnO 2 /SnS 2 heterojunction anchored on biochar through −C Sn− bonds between biochar and SnS 2 , as demonstrated by X-ray photoelectron spectroscopy characterization. DFT calculations further confirmed −C Sn− bonds can shorten theoretical band gap of SnS 2 @biochar from 1.01 eV to 0.66 eV and provide a pathway for swift electron migration, which can effectively modulate the separation of photo-induced carriers and promote the generation of e − and h + . Additionally, the oxalate activated by −C Sn− bonds can effectively capture h + and produce abundant ∙CO 2 – free radicals. When the obtained composites were used as photocatalysts , Cr(VI) was thoroughly reduced by the SnO 2 /SnS 2 @biochar composite with a molar ratio of SnO 2 and SnS 2 of 2 within 20 min under visible light irradiation when oxalate was 1.0 mM (CSO-2/H 2 C 2 O 4 -1). Furthermore, CSO-2/H 2 C 2 O 4 -1 exhibited excellent reusability, and the degradation efficiency of Cr(VI) remained above 91.71% after five cycles. The remarkable photocatalytic properties can be ascribed to the synergistic effects of e − and ∙CO 2 – . This work proposes a new strategy for the preparation of an applied photocatalyst with a high separation rate of photoinduced carriers.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2020
·
IF 4.019
Zhongwei Fan,Jingfei Luan,Changqing Zhu,Fuqiang Liu
The novel Z-scheme heterojunction photocatalyst g-C 3 N 4 /Ag 2 S/SnS 2 with Ag 2 S quantum dots as electron mediators was successfully synthesized by in-situ ion exchange reaction and self-peeling of g-C 3 N 4 . Compared with g-C 3 N 4 , SnS 2 or g-C 3 N 4 /SnS 2 , the photocatalyst g-C 3 N 4 /Ag 2 S/SnS 2 exhibited more excellent photocatalytic performance under visible light irradiation. The removal rate of methyl orange was 96.8% after 30 minutes visible light irradiation and the reaction rate constant reached 0.10225 min -1 . The enhanced photocatalytic activity could be attributed to the formation of Z-scheme heterojunction structure and the 2D layered structure. The electrochemical and photoelectric performance tests showed that the separation and transfer efficiency of the photogenic electron-hole pairs as well as the redox potential were significantly improved. Additionally, the quenching experiments showed that the superoxide radicals and holes were the primarily active species. Combined with other characterizations, the reaction mechanism of the g-C 3 N 4 /Ag 2 S/SnS 2 for degrading the target pollutant methyl orange under visible light irradiation was proposed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Yajie Zhang,Yi Li,Yadong Jiang,Zaihua Duan,Zhen Yuan,Bohao Liu,Qi Huang,Qiuni Zhao,Yajie Yang,Huiling Tai
Transition metal carbides/nitrides (MXenes) have shown great potential in room temperature (RT) gas sensors, but the self-stacking of MXene sheets limits their sensitivity and response/recovery speed. In addition, the poor selectivity of MXenes sensors caused by the conventional single sensing mechanism remains a challenge. Herein, a synergistic effect of charge transfer and interlayer swelling is proposed to comprehensively improve the gas sensing performance of the MXenes toward oxidizing NO 2 . To this end, a resistive gas sensor is prepared by combining the accordion-like V 2 CT x MXene and n-type SnS 2 nanoplates . The results reveal that the NO 2 sensitivity of the V 2 CT x /SnS 2 sensor is enhanced by 581.6 times compared to the pristine V 2 CT x sensor, while achieving ultrafast response and recovery speeds (4.8/4.7 s) at 25 °C under 51.9 % relative humidity. Furthermore, the V 2 CT x /SnS 2 sensor exhibits excellent selectivity (response ratio > 5) to NO 2 . The outstanding gas sensing performances can be attributed to the synergistic sensing of charge transfer and interlayer swelling, unique structure and more active sites. This work expands the gas sensing application of the V 2 CT x MXene and promotes the in-depth combination of multiple sensing mechanisms, opening an effective avenue for developing high-performance RT NO 2 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
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zhihao Shi,Bingjue Wang,Ziwei Zhang,Han Chen,Yujie Shi,Yulei Sui,Ling Wu
Transition metal carbides/nitrides (MXene) emerge as promising enhancers for high-capacity metal sulfide anodes, owing to exceptional electrical conductivity, mechanical robustness and adaptable surface chemistry. Here, MXene/SnS 2 heterostructures with a honeycomb architecture are fabricated by a mild liquid-phase deposition method. Density functional theory calculations reveal that the negatively charged MXene terminal groups govern the Sn 4+ cation adsorption, thereby promoting nucleation. By optimizing component dispersion and interfacial bonding, the composite effectively combines the high capacity of SnS 2 with the conductive MXene framework, achieving initial discharge capacities of 1547.0 and 555.3 mAh g −1 at the current densities of 0.1 and 5 A g −1 , respectively. After 1000 cycles, it retains a capacity retention of 69.5 % at 5 A g −1 . The hierarchically structured interface enhances ion transport and pseudocapacitive effects, enabling fast rate performance. The approach provides an idea for designing fast-charging anodes with high energy density.
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DOI
高影响因子
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