ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Tariq Ali,Xianfu Wang,Kai Tang,Qun Li,Saman Sajjad,Shahid Khan,Sidra Anis Farooqi,Chenglin Yan
Electrocatalytic active sites along the Mo-terminated edge of molybdenum disulfide (MoS 2 ) are responsible for the promising hydrogen evolution reaction (HER) activity but poor electrical convey, and scarcity of active sites may inhibit its electrocatalytic performance. Therefore, enhancing the electronic conductivity and increasing the active sites in basal plane are required to realize more efficient hydrogen evolution activity for layered MoS 2 . Herein, by the incorporation of heterophase SnS 2 quantum dots into the basal plane to form atomic-level heterostructure, we dramatically report the enhanced HER activity from MoS 2 with current density of −10 mA cm −2 at a lowered overpotential of 240 mV, a reduced Tafel slope of 65 mV/dec and a long-term durability over 18 h operation. Structural characterization and electrochemical studies reveal the incorporation of heterophase SnS 2 quantum dots can efficaciously realize the disorder engineering in the atomic level to regulate the electronic structure, optimize the energy barrier of hydrogen adsorption/desorption, and proliferate the catalytic active sites density, thus activating the basal plane of MoS 2 for hydrogen evolution. Density functional theory (DFT) calculation reveals the inception of the improved electrocatalytic activity stemmed from an astronomically immense reduction of the kinetic energy barrier of hydrogen adsorption on and desorption from sulfur sites and sulfur vacancies in the basal plane upon SnS 2 incorporation and Sn doping. Our work engenders an efficient method to active the basal plane of 2H-MoS 2 by the incorporation of SnS 2 heterophase into the atomic layer inducing atomic dislocation and electronic structure optimization.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2014
·
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemPlusChem
·
2023
·Vol. 88
·期 7
·e202300247
·
IF 3.4
Libao Han,Minghuo Wu,Yufeng Hu
Graphical A colorimetric detection method based on Fe 3 O 4 /SnS 2 composites was established for the detection and discrimination of ten phenols for the first time. The incorporation of the photo catalyst SnS 2 significantly improved the peroxidase-like activity of Fe 3 O 4 , leading to an enhancing efficiency of the colorimetric detection method. The developed method could rapidly determine the total phenols in real water samples. Phenols pose a great threat to human and environment due to their high toxicity and low bio-degradability. Therefore, the development of a rapid and sensitive detection method for multiple phenols is of great importance. Here, a colorimetric detection method based on Fe 3 O 4 /SnS 2 composites was established for the detection and discrimination of ten phenols for the first time. The results demonstrated that the incorporation of the photo catalyst SnS 2 significantly improved the peroxidase-like activity of Fe 3 O 4 , leading to an enhancing efficiency of the colorimetric detection method. The developed method was capable of detecting phenol within a concentration range of 0.5–2000 μM, with detection limit as low as 0.06 μM. This method was successfully applied to detect total phenols in samples obtained from two sewage treatment plants and seawater. Furthermore, by employing principal component analysis, the established colorimetric method enabled the simultaneous discrimination of all ten phenols. The performance was further evaluated by accurately identifying binary or ternary mixtures of phenols, and even identifying the type of phenol in 10 unknown samples containing one of the ten phenols. These findings highlight the potential of the Fe 3 O 4 /SnS 2 composite as a promising candidate for the simultaneous detection of multiple phenols in liquid samples.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Horizons
·
2022
·Vol. 7
·期 10
·1217-1227
·
IF 11.684
Yuqi Liu,Chunhui Lu,Mingwei Luo,Taotao Han,Yanqing Ge,Wen Dong,Xinyi Xue,Yixuan Zhou,Xinlong Xu
Van der Waals heterostructures have great potential for the emerging self-powered photoelectrochemical photodetectors due to their outstanding photoelectric conversion capability and efficient interfacial carrier transportation. By considering the band alignment, structural design, and growth optimization, the heterostructures of vertically oriented SnS2 with different densities on MoS2 nanosheets are designed and fabricated using a two-step epitaxial growth method. Compared with SnS2, MoS2, and low density–vertical SnS2/MoS2 heterostructure, the high density–vertical SnS2/MoS2 heterostructure exhibits largely enhanced self-powered photodetection performances, such as a giant photocurrent density (∼932.8 μA cm−2), an excellent photoresponsivity (4.66 mA W−1), and an ultrafast response/recovery time (3.6/6.4 ms) in the ultraviolet-visible range. This impressive enhancement of high density–vertical SnS2/MoS2 photodetectors is mainly ascribed to the essentially improved charge transfer and carrier transport of type-II band alignment heterostructures and the efficient light absorption from the unique light-trapping structure. In addition, the photoelectrocatalytic water splitting performance of the high density–vertical SnS2/MoS2 heterostructure also benefits from the type-II band alignment and the light-trapping structure. This work provides valuable inspiration for the design of two-dimensional optoelectronic and photoelectrochemical devices with improved performance by the morphology and heterostructure design.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Xiaofang Liu,Hengyang Wang,Bin Zhang,Sikang Zheng,Yao Chen,Hong Zhang,Xianhua Chen,Guoyu Wang,Xiaoyuan Zhou,Guang Han
SnSe, possessing strong lattice anharmonicity and structural anisotropy, has attracted massive attention in thermoelectric conversion. Herein, we demonstrate that simultaneously optimized electrical and thermal transport properties are achieved in SnS 2 -alloyed SnSe polycrystalline materials , which were fabricated via sintering the mixture of solution-synthesized SnSe microplates and SnS 2 nanoplates. Resulting from the increased carrier concentration, p-type (SnSe) 1– x (SnS 2 ) x ( x = 0.5%, 1%) samples obtain much-improved power factor between 300 K and 373 K, e.g. 0.72 mW m –1 K –2 at 300 K for (SnSe) 0.99 (SnS 2 ) 0.01 , which is enhanced by 53% compared to that of SnSe. Additionally, the existing point defects and planar defects effectively strengthen phonon scattering, thus reducing the lattice thermal conductivity , for example, 0.47 W m –1 K –1 at 773 K for the x = 0.02 sample. Eventually, a maximum zT of 0.80 at 823 K and an average zT of 0.52 over 300 – 823 K are obtained in the (SnSe) 0.99 (SnS 2 ) 0.01 sample, which are increased by 33% and 45% compared to those of SnSe, respectively. This study demonstrates a secondary phase alloying strategy to synergistically optimize the electrical and thermal properties of polycrystalline SnSe.
研究领域:
材料科学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 11
·4188-4196
·
IF 8.897
Guo Sheng-Qi,Zhang Haijun,Hu Zhenzhong,Zhen Mengmeng,Yang Bo,Shen Boxiong,Dong Fan
Semiconductor combination is one of the most common strategies to obtain high-efficiency photocatalysts; however, the effect mechanism of composition ratio on micro-structure and photocatalytic activity is remaining unclear. In this study, a case of g-C 3 N 4 quantum dots@SnS 2 (CNQD n @SnS 2 ) heterojunction with different ratio of CNQD is used to uncover the origin of optimum and excess composition for photocatalysts. Research on the functional mechanism of the optimum composition shows that 0.8 wt.% CNQD are completely attached to the non-(001) facets of SnS 2 , which benefits the formation of type-II heterojunction, resulting in an optimal pollutant degradation and mineralization efficiency. For the excess composition, both experiments and theoretical calculations confirm that excess CNQD (the part exceeding of 0.8 wt.%) located on the (001) facet of SnS 2 , leading to the type-I band alignment of this heterojunction, which severely restricts the separation of photo-induced charge carriers, and thus reduces their lifetime. This work makes the functional mechanism of composition ratio on micro-structure and photocatalytic activity clearer. Related research results provide a new insight into semiconductor combination study and take an important step toward the rational design of highly active photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2019
·Vol. 1
·期 10
·3973-3979
·
IF 0
Haoting Ying,Xin Li,Yutong Wu,Yi Yao,Junhua Xi,Weitao Su,Chengchao Jin,Minxuan Xu,Zhiwei He,Qi Zhang
van der Waals layered two-dimensional (2D) metal dichalcogenides, such as SnS2, have garnered great interest owing to their new physics in the ultrathin limit, and become potential candidates for the next-generation electronics and/or optoelectronics fields. Herein, we report high-performance UV photodetectors established on high quality SnS2 flakes and address the relatively lower photodetection capability of the thinner flakes via a compatible gate-controlling strategy. SnS2 flakes with different thicknesses were mechanically exfoliated from CVT-grown high-quality 2H-SnS2 single crystals. The photodetectors fabricated using SnS2 flakes reveal a desired response performance (Rλ ≈ 112 A W−1, EQE ≈ 3.7 × 104%, and D* ≈ 1.18 × 1011 Jones) under UV light with a very low power density (0.2 mW cm−2 @ 365 nm). Specifically, SnS2 flakes present a positive thickness-dependent photodetection behavior caused by the enhanced light absorption capacity of thicker samples. Fortunately, the responsivity of thin SnS2 flakes (e.g. ∼15 nm) could be indeed enhanced to ∼140 A W−1 under a gate bias of +20 V, reaching the performance level of thicker samples without gate bias (e.g. ∼144 A W−1 for a ∼60 nm flake). Our results offer an efficient way to choose 2D crystals with controllable thicknesses as optimal candidates for desirable optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
ACS Sensors
·
2024
·
IF 8.2
Huimin Yang,Zhenming Du,Yazhou Yang,Qirui Wu,Chaofan Ma,Huiyu Su,Xiaoxia Wang,Dawen Zeng
Developing gas sensors capable of efficiently detecting harmful gases is urgent to protect the human environment. Here, an active Ce–Ag bimetallic pair was innovatively introduced into SnS2, which successfully exhibited excellent NO2 gas sensing performance. 0.8% Ce–SnS2–Ag showed a gas sensing response of 5.18 to 1 ppm of NO2 at a low temperature of 80 °C, with a lower limit of detection as low as 100 ppb. DFT calculations revealed that Ce atoms are substituted into the main lattice of SnS2, which opens up the interlayer spacing and serves as an anchor point to fix the Ag atoms in the interlayer. The Ce–Ag bimetallic pairs successfully modulate the electronic structure of SnS2, which promotes the adsorption and charge transfer between NO2 and Ce–SnS2–Ag and thus achieves such an outstanding gas sensing performance. This work opens an avenue for the rational functional modification of SnS2 with an optimized electronic structure and enhanced gas sensing.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 9
·2308-2313
·
IF 4.136
Ke Wang,Ying Huang,Xiulan Qin,Mingyue Wang,Xu Sun,Meng Yu
Graphical Stress relief : A facile two-step hydrothermal route is introduced to prepare hollow SnO 2 /SnS 2 hybrids. Subsequently, their electrochemical performances as anodes in Na-ion batteries are investigated. The as-prepared hollow SnO 2 /SnS 2 hybrids are composed of ultrafine SnS 2 nanosheets, which directly grow on the pre-grown hollow SnO 2 hollow spheres. In the structure, both the SnO 2 hollow structures and surrounding SnS 2 nanosheets are able to alleviate internal stress during sodiation/desodiation. Alloying-type Sn material has been considered as an excellent anode material for sodium-ion batteries (SIBs). However, the limitation of capacity is still a challenge that remains to be solved. In this approach, we introduce a facile two-step hydrothermal route to prepare hollow SnO 2 /SnS 2 hybrids and investigate their electrochemical performances as anodes in SIBs for the first time. Benefiting from their structural features, the hollow SnO 2 /SnS 2 hybrids exhibit a high reversible sodium storage capacity of about 485.64 mA h g −1 at 300 mA g −1 after 100 cycles with a capacity retention of 78.7 %, which is much higher than 25.9 % for bare SnO 2 hollow spheres and 28.5 % for bare SnS 2 nanosheets. Taking into consideration the outstanding performance and the special structural design, this work could provide a potential strategy to improve the electrochemical performances of tin-based electrodes, as well as that of other anodes in SIBs.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Hangxi Liu,Haorong Sun,Peng Zhao,Kangle Shang,Ming Fang,Xiaoli Tan,Long Yu,Bin Ma
Nitrite ions originate from various natural and anthropogenic sources and can cause health issues including methemoglobinemia and potential carcinogenic effects. As the nitrite in water has become an increasing threat to human health, the accurate evaluation of nitrite is urgently needed for environmental quality and safety management. In this paper, we designed a CTAB/SF5/GCE sensor, which exhibited an obvious enhancement compared to the pristine glassy carbon electrode (GCE). The morphology characterization confirmed the hexagonal nanosheets of SnS 2 and the even distribution of Fe element. The energy band, Tafel plots, and EIS spectroscopy were employed to investigate the enhancement mechanism, demonstrating that improving charge transfer on the sensing interface is crucial in enhanced signals. Cyclic voltammetry (CV) was adopted as the electrochemical method to measure the nitrite in water and a sensitivity of 0.129 μA·μM −1 was exhibited in the range of 30–500 μM, and the limit of detection (LOD) was calculated to be 6.51 μM. The reliability including the repeatability, reproducibility, and stability of this sensor were estimated and showed satisfactory results. The test in real samples and the assessment of interfering substances showed the CTAB/SF5/GCE possesses a large potential in the practical application of electrochemical sensing of nitrite.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Limin Guo,Runze Hu,Caifu Zhong,Xinxin Wang,Jiaming Liu,Xiaohui Wang
An elegant templating method has been developed for the rational design and synthesis of hierarchical SnS 2 nanoclusters composed of ultrathin nanosheets and embedded inside TiO 2 nanoporous arrays. Herein, benefiting from their unique structural merits and metal-like plasmonic activity, the TiO 2 @SnS 2 heterostructures exhibit enhanced photocatalytic H 2 evolution properties in terms of good cycling performance. S vacancies and N-doping are proved to be vitally important to the electronic structures and bandgap of SnS 2 , thus influence the plasmonic property and separation of photo-carriers. The optimized TiO 2 @6nmSnS 2 /N nanoporous arrays give an ultra-high H 2 yield rate of 285 μmol h −1 cm −2 under a low catalyst loading mass, that comparable to most noble metal catalysts . Remarkable cycling performance with a capability retention of 90% is achieved after 30 h under solar light illumination. As an innovative exploration, this study demonstrates that the photocatalytic activities of nonmetal, earth-abundant SnS 2 can be enhanced with plasmonic effect, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 13
·4728-4736
·
IF 6.843
Jun Yang,Lin Sun,Shuhan Hui,Peng Zhang,Jian Li,Dong Wang,Xuelin Wang,Shan Jiang
Severe bacterial infections have brought an urgent threat to our daily life, and photothermal therapy (PTT) has acted as an effective method to kill bacteria. Herein we decorated Ag on the surface of SnS2 (Ag@SnS2), which has outstanding photothermal conversion capability and good biocompatibility. The decoration of Ag on SnS2 improved the absorption of near-infrared (NIR) light in comparison to SnS2, resulting in a temperature increase of 50 °C after 5 min of NIR light irradiation (1.9 W cm−2) and a photothermal conversion efficiency of 31.3%. Ag@SnS2 exhibits almost 100% growth inhibition of E. coli and S. aureus bacteria due to hyperthermia, with a concentration larger than 0.5 mg mL−1 and 5 min of NIR irradiation. Meanwhile, SEM images of treated bacterial cells showed the attachment of Ag@SnS2 on the cell surface and obvious cellular membrane destruction. Ag@SnS2 can also accelerate in vivo wound healing through PTT-induced bacterial disinfection. Therefore, Ag@SnS2 exhibits great potential for photothermal antibacterial application and wound disinfection.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
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）