JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Feifei You,Yunan Zhou,Danyang Li,Hao Zhang,Dawei Gao,Xiaohong Ma,Rui Hao,Juzhe Liu
Photoreduction of CO 2 to value-added chemicals and fuels is an attractive solution to alleviate environmental problems and energy crisis at the same time. However, engineering efficient photocatalysts with high activity and product selectivity is still challenging. Herein, we achieved three-dimensional (3D) spatial configuration design at micro-scale and heterogeneous interface construction at nano-scale on a SnS 2 /SnO 2 composite, which featured hierarchical flower-like morphology consisted of nanosheets and type-II semiconductor structure . It behaved excellent selectivity and impressive photocatalytic CO 2 -to-CO performance with a yielding rate of 60.85 μmol g -1 h −1 , roughly 3 times higher than that of SnS 2 and was in the front rank of this kind catalysts under 300 W Xe lamp illumination without using any sensitizers or noble metals . The enhanced catalytic capability could be attributed to the elaborately built structure with suitable energetic position that afforded effective separation and migration of photo-generated electron/hole pairs as well as enhanced light caption and absorption. Meanwhile, main reactive intermediates (e.g., CO 2 – and *COOH) were captured by in-situ Fourier transform infrared spectroscopy (FTIR), suggesting a fluent catalytic pathway on the SnS 2 /SnO 2 platform. This work provides a new scheme to build advanced catalysts based on multiscale design and rational phase assembling.
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
PubMed
高影响因子
Small
·
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
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光电催化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Li Siyuan,Li Liyun,Liu Xu,Wang Yanlai,Wang Ligang
To address the high cost and scarcity of traditional platinum (Pt) counter electrodes, this study designed a novel non-Pt counter electrode material: nitrogen-doped hollow mesoporous carbon sphere (NCS)-loaded SnS 2 @SnO 2 heterojunctions (SnS 2 @SnO 2 /NCSs). By optimizing the mass ratio of Sn/S precursors to NCSs, the morphology of the composite was tailored. Comprehensive characterization via XRD, XPS, SEM, TEM, and Raman spectroscopy revealed that SnS 2 @SnO 2 nanoparticles (10–20 nm) were uniformly distributed within the internal/external walls and cavities of the NCSs via mesoporous confinement, forming a 3D conductive network. Nitrogen doping (I D /I G = 1.12) endowed the carbon matrix with abundant active sites, while the band alignment of the SnS 2 @SnO 2 heterojunction significantly enhanced catalytic activity. Electrochemical tests demonstrated a charge transfer resistance (R ct = 22.25 Ω·cm 2 ) close to Pt (15.78 Ω·cm 2 ), with reduced low-frequency diffusion impedance. When integrated into dye-sensitized solar cells (DSSCs), the SnS 2 @SnO 2 /NCSs-based device achieved a power conversion efficiency (PCE) of 7.32% (J sc = 17.23 mA·cm⁻ 2 , V oc = 737.46 mV, FF = 0.57), representing a 36% improvement over the pure heterojunction (5.38%) and approaching Pt-based devices (8.39%). This work provides a cost-effective strategy for developing high-performance non-Pt counter electrodes.
研究领域:
材料科学
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纳米技术
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电化学
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可再生能源
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2017
·Vol. 43
·期 9
·5217-5228
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IF 1.369
Qin Na,Jing Kaiqiang,Chen Rui,Xiong Jinhua,Liang Ruowen,Li Zhaohui,Wu Ling
Abstract SnS 2 /SnO 2 nanocomposites have been successfully prepared via a hydrothermal method using electrospun SnO 2 nanotubes as both substrates and reactants. The ratios of the nanocomposites are controlled by varying the concentration of thioacetamide during the solvothermal synthesis processes. The as-prepared SnS 2 /SnO 2 nanocomposites exhibit considerable improvement on the photocatalytic activities for the reduction of aqueous Cr(VI) under visible light irradiation. Their photoactivities are also much higher than that of SnS 2 nanoplates and a physical mixture of SnO 2 and SnS 2 . In particular, the SnS 2 /SnO 2 -B sample exhibits the highest photocatalytic activity. After visible light irradiation for 60 min, the reduction rate has reached about 100%. The photoelectrochemical analyses further show that the high photocatalytic activity of the SnS 2 /SnO 2 -B sample can be ascribed to the unique structural features and the intimate interfacial contact between SnS 2 and SnO 2 , which is more effective separation of the photo-generated carriers. Graphical Abstract
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2017
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IF 2.986
Lixiong Yin,Simin Chai,Jianfeng Huang,Xingang Kong,Jia Wang,Peijie Bai
In present work, Sn-based composites have been successfully synthesized by the solvothermal method. The composition and content of the solvent have crucial influences on the phase composition, crystallinity and morphology of the samples. It is found that the nanoflakes assembling to the spherical SnS 2 /SnO 2 obtained in deionized water (DI w) gradually convert to nanoparticles in anhydrous ethanol (AE) solvent. The hierarchical SnS 2 /SnO 2 composites obtained in AE solvent exhibit excellent electrochemical performances. The initial discharge capacity of the anode can reach to 1420.06 mA h g −1 at 100 mA g −1 for lithium-ion batteries (LIBs), and the capacity can maintain 588.15 mA h g −1 after 50 cycles. Compared with other Sn-based anode materials , the SnS 2 /SnO 2 sample obtained in the AE solvent can still retain a stable discharge capacity of 559.16 mA h g −1 even at 800 mA g −1 . The results obtained in the work reveal the influence of the solvent on the morphology of Sn-based samples and the potential of the sphere-like SnS 2 /SnO 2 structure as LIBs anode.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shaoshuang Zhu,Kaiyu Liu,Lu Pan,Huimin Jiang,Jianjian Lin
Tin (Sn), owing to its unique electronic structure and inherent suppression of the hydrogen evolution reaction (HER), has garnered significant attention as an electrocatalyst for nitrogen reduction reactions (NRR). Synthesizing high-performance Sn-based heterostructure catalysts, however, remains a substantial challenge. In this study, we employ a combination of interface engineering and doping strategies to introduce iron (Fe) into the SnS 2 /SnO 2 heterostructure for the first time and develop a novel Fe-SnS 2 /SnO 2 @NF catalyst, which represents the first application of such a catalyst in NRR. Furthermore, density functional theory (DFT) calculations reveal that the introduced Fe promotes charge redistribution at the SnS 2 /SnO 2 interface, thereby enhancing the interfacial electric field. This amplified electric field plays a key role in activating orbital interactions and regulating electron distribution, thereby greatly facilitating the conversion of N 2 to NH 3 via a distal binding mechanism. This effect has been rarely reported in previous studies. Notably, the Fe-SnS 2 /SnO 2 @NF catalyst achieves an ammonia yield of 39.05 ± 2.27 μg h −1 cm −2 and a Faradaic efficiency (FE) of 29.52 ± 0.71% at room temperature, surpassing the NRR activity of other Sn-based materials. This work represents a significant advancement in understanding the role of doping strategies in enhancing the interfacial electric field of heterostructures and provides valuable insights into their effectiveness for nitrogen fixation.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Xiaoning Meng,Mingshu Bi,Qiuping Xiao,Wei Gao
With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H 2 ), it is urgent to develop the portable sensors that can sensitively and quickly detect H 2 leaks. In this work, the H 2 sensing characteristics of Pd/SnS 2 /SnO 2 nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS 2 and Pd loading on the H 2 sensing performances of SnO 2 nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H 2 sensing experimental results demonstrated that SnS 2 and Pd modification can greatly enhance the sensing capabilities of SnO 2 , where 1.0 at% Pd/SnS 2 /SnO 2 sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H 2 at 300 ℃, thus outperforming the current reported sensing performances of SnO 2 -based H 2 sensors. The superior sensing characteristics of Pd/SnS 2 /SnO 2 were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H 2 sensors.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Jing Wu,Rong Zhao,Hui Xiang,Chenfan Yang,Wenda Zhong,Chengzhi Zhang,Qin Zhang,Xuanke Li,Nianjun Yang
Tin disulfide (SnS 2 ), one transition metal dichalcogenide (TMD) is a cost-effective and promising electrocatalyst for hydrogen evolution reactions (HER) in the alkaline electrolytes. Its electrocatalytic HER performance is unfortunately limited, originating from its un-conspicuous inherent catalytic activities and non-favorable adsorption sites for hydrogen. Herein, a tin disulfide/stannic oxide (SnS 2 /SnO 2 ) heterostructure is designed and grown on the nickel foam (denoted as SnS 2 /SnO 2 -NF). The SnS 2 /SnO 2 heterostructure introduces more active (100) facets or a high density of active sites, accelerates the diffusion kinetic of electrons and ions, lowers the water dissociation energies, and optimizes adsorption energies of hydrogen atoms. On this catalyst, superior HER performance is realized in an alkaline medium. An overpotential of 108 mV at a current density of −10 mA cm –2 with a Tafel slope of 50.1 mV dec –1 and long-term durability are achieved for HER in 1 M KOH. This work paves a new way to design high-performance HER electrocatalyst through facet engineering of the designed heterostructures.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
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