Polymers
·
2022
·Vol. 14
·期 24
·5483
·
IF 4.967
Changqing Yang,Chenghai Ma,Duoping Zhang,Zhiang Luo,Meitong Zhu,Binhao Li,Yuanyuan Zhang,Jiawei Wang
In this study, a novel direct Z-scheme SnS2quantum dots/sulfur-doped polyimide (SQDs/SPI) photocatalyst was firstly fabricated by an in situ crystallization growth of SnS2quantum dots on sulfur-doped polyimide through a facile hydrothermal method. The photocatalytic hydrogen production activity of 5SQDs/SPI samples reached 3526 μmoL g−1in the coexistence of triethanolamine and methanol used as hole sacrificial agents, which is about 13 times higher than that of SPI under the same conditions and 42 times higher than that of SPI only as a hole sacrificial agent. The improvement can be related to the direct Z-scheme charge transfer in the tight interface between SQDs and SPI, which promoted rapid separation and significantly prolonged the lifetime of photoexcited carriers. The Z-scheme charge transfer mechanism was proposed. This discovery comes up with a new strategy for the development of an efficient, environmentally friendly, and sustainable sulfide quantum dots/polymer non-noble metal photocatalyst.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yong Zuo,Xijun Xu,Chaoqi Zhang,Junshan Li,Ruifeng Du,Xiang Wang,Xu Han,Jordi Arbiol,Jordi Llorca,Jun Liu,Andreu Cabot
Tin disulfide is a promising anode material for Li-ion batteries (LIB) owing to its high theoretical capacity and the abundance of its composing elements. However, bare SnS 2 suffers from low electrical conductivity and large volume expansion, which results in poor rate performance and cycling stability. Herein, we present a solution-based strategy to grow SnS 2 nanostructures within a matrix of porous g-C 3 N 4 (CN) and high electrical conductivity graphite plates (GPs). We test the resulting nanocomposite as anode in LIBs. First, SnS 2 nanostructures with different geometries are tested, to find out that thin SnS 2 nanoplates (SnS 2 -NPLs) provide the highest performances. Such SnS 2 -NPLs, incorporated into hierarchical SnS 2 /CN/GP nanocomposites, display excellent rate capabilities (536.5 mA h g −1 at 2.0 A g −1 ) and an outstanding stability (∼99.7% retention after 400 cycles), which are partially associated with a high pseudocapacitance contribution (88.8% at 1.0 mV s −1 ). The excellent electrochemical properties of these nanocomposites are ascribed to the synergy created between the three nanocomposite components: i) thin SnS 2 -NPLs provide a large surface for rapid Li-ion intercalation and a proper geometry to stand volume expansions during lithiation/delithiation cycles; ii) porous CN prevents SnS 2 -NPLs aggregation, habilitates efficient channels for Li-ion diffusion and buffer stresses associated to SnS 2 volume changes; and iii) conductive GPs allow an efficient charge transport.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yang Li,Qiao Yin,Yingshan Zeng,Zhi Liu
The core of realizing the effective CO 2 conversion by solar energy is to develop a stable photocatalyst with high CO 2 adsorption capacity and high charge separation efficiency. In this work, a hollow spherical Z-scheme SnS 2 /g-C 3 N 4 /C (SCC) photocatalyst is successfully constructed by a morphology-inherited strategy. Biomass mabospores are utilized as both the precursor for formation of hollow spherical structure and carbon source, and the g-C 3 N 4 and SnS 2 nanosheets tightly anchor on the surface of mabospores-derived carbon spheres. The Z-scheme SCC heterostructure exhibits 5.5 times activity enhancement on CO 2 photoreduction to CO with a high evolution rate up to 40.86 μmol∙g −1 ∙h −1 . Examined by various photoelectrochemical analysis, the boosted photocatalytic activity originates mainly from the construction of hollow spherical Z-scheme heterojunction, providing the more preferable basic sites for CO 2 adsorption, promoting the separation efficiency of electron-hole pairs, as well as increasing the reductionability of electrons in conduction band of g-C 3 N 4 . The formed internal electric fields between the g-C 3 N 4 and SnS 2 can also further reinforce the spatial separation of photogenerated charge carriers. Theoretical calculations further verify that the SCC Z-scheme heterostructure can effectively decrease the energy barriers of formed intermediates, especially the crucial COOH*, and thus leading to the facile conversion of CO 2 -to-CO. This work induces a new strategy to construct g-C 3 N 4 -based Z-scheme heterojunction assisted by versatile biomasses with optimized structure and enhanced photoelectrochemical merits for efficient CO 2 conversion into chemical fuels.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2022
·
IF 4.11
Dafeng Gao,Dayi Jiao,Fuming Chen,Yuheng Liang,Yinzhen Wang,Guannan He,Wei Li,Qinyu He
In this study, SnS 2 /S-doped g-C 3 N 4 (Sg-C 3 N 4 ) composite with SnS 2 and Sg-C 3 N 4 in the weight ratio of 9:1 was prepared by a hydrothermal method . For comparison, composites of SnS 2 /Sg-C 3 N 4 with weight ratios of 9:0.05 and 9:1.5, pure SnS 2 , Sg-C 3 N 4 , and g-C 3 N 4 were also prepared using the same processing parameters. Microstructural characterization showed that nano-sized SnS 2 particles were deposited on Sg-C 3 N 4 to form a Z-scheme photocatalyst . The chemical valence of the doped S in Sg-C 3 N 4 was +6, allowing the surface of Sg-C 3 N 4 in the composite to be considerably uneven for the deposition of SnS 2 . The uneven surface of Sg-C 3 N 4 resulted in a rough surface of the SnS 2 /Sg-C 3 N 4 composite, which significantly enhanced the specific surface area and light absorption over a wide wavelength range of 200–1000 nm. The carrier transfer capability and lifetime of g-C 3 N 4 were improved after S doping. The lifetime and transfer ability of the photoproduced carriers in the composite were improved by the Z-scheme heterojunction . Consequently, the rate constant of the composite is thrice that of pure SnS 2 and 57 times that of Sg-C 3 N 4 . This work demonstrates a novel route to enhance light absorption over a wide wavelength range: depositing a semiconductor on a base semiconductor with an uneven surface charge distribution can produce a composite with a rough surface, i.e., a large specific surface area.
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
JOURNAL OF POWER SOURCES
·
2025
·
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
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Cijun Shuai,Xingming Long,Binxin Sun,Tiantian He,Xiong Shuai,Guoyong Wang,Shuping Peng
Bacterial infection is a severe challenge faced by artificial bone transplantation, which might cause delayed bone healing or even transplant failure. Photodynamic therapy (PDT) has garnered widespread attention as a treatment for infections due to its noninvasiveness, few side effects, and high spatiotemporal selectivity. Nevertheless, owing to the bacterial membrane obstacle, it is difficult for exogenous reactive oxygen species (ROS) to penetrate into bacteria, which leads to an unsatisfactory antibacterial effect. Herein, a heterojunction of Ti2C3 nanosheets/tin disulfide (MXene/SnS2) is designed, which integrates photothermal and photodynamic properties. Then, MXene/SnS2 was incorporated into a poly-l-lactic acid powder (PLLA) matrix to fabricate an artificial bone scaffold with selective laser sintering (SLS) technology. Under near-infrared laser irradiation, SnS2 can strengthen the near-infrared light absorption of MXene to generate local hyperthermia, thus enhancing bacterial membrane permeability. Meanwhile, MXene/SnS2 enhances charge transfer and inhibits electron–hole pair separation, thereby generating more ROS that can penetrate the bacterial interior. The results indicated that this antibacterial strategy has effective antibacterial activity, and the antibacterial rate reached over 90%. Overall, this research presents an attractive antibacterial strategy for implant-related infection.
研究领域:
生物医学工程
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材料科学
·
感染病学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Wangen Zhao,Gang Wang,Qingwen Tian,Yanchun Yang,Lijian Huang,Daocheng Pan
Cu2ZnSn(S,Se)4 semiconductor is a promising absorber layer material in thin film solar cells due to its own virtues. In this work, high quality Cu2ZnSn(S,Se)4 thin films have been successfully fabricated by an ethanol-based sol–gel approach. Different from those conventional sol–gel approaches, SnS2 was used as the tin source to replace the most commonly used SnCl2 in order to avoid the possible chlorine contamination. In addition, sodium was found to improve the short-circuit current and fill factor rather than the open-circuit voltage due to the decrease of the thickness of small-grained layer. The selenized Cu2ZnSn(S,Se)4 thin films showed large densely packed grains and smooth surface morphology, and a power conversion efficiency of 6.52% has been realized for Cu2ZnSn(S,Se)4 thin film solar cell without antireflective coating.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
2D Materials
·
2017
·Vol. 4
·期 2
·025097
·
IF 6.937
Yan Wang,Wu-Xing Zhou,Le Huang,Congxin Xia,Li-Ming Tang,Hui-Xiong Deng,Yongtao Li,Ke-Qiu Chen,Jingbo Li,Zhongming Wei
P–n junctions based on vertically stacked van der Waals (vdW) materials have attracted extensive attentions and may offer novel physical performances for the design of next-generation electronics. Here, vertically stacked p-WSe2/n-SnS2 heterostructures have been fabricated by a polymethyl methacrylate (PMMA)-assisted transfer method. The unique electronical properties and self-driven photoelectric characteristics of the heterostructures are measured. The transfer current of the heterostructures show gate-tunable 'anti-ambipolar' behavior under dark condition with the maximum of the on/off ratio exceeding 105, while under light illumination it triggers double 'on' state anti-ambipolar behavior. The 'anti-ambipolar' behavior under dark condition and the 'on' state I under light illumination is originating from the in series of p-channel in WSe2 and n-channel in SnS2, while the 'on' state II can be attributed to the gate-controlled Schottky barrier modulation between the heterostructure and the Au electrodes. The heterostructure also shows self-driven photoswitching performance under 532 nm laser, which can be attributed to the type-II band alignment and the build-in potential of p–n heterostructure.
研究领域:
材料科学
·
电子工程
·
光电器件
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Ning Liu,Fuhao Fei,Wangxi Dai,Jianqiu Lei,Fukun Bi,Botao Wang,Guixiang Quan,Xiaodong Zhang,Liang Tang
Herein, a highly efficient Z-scheme SnS 2 /MIL-88B (Fe) (SnSFe) heterojunction was successfully synthesized to use both as photocatalysts and persulfate (PS) activator for ibuprofen (IBP) degradation. Flower-liked SnS 2 was uniformly loaded on MIL-88B (Fe), and SnSFe retained the original polyhedral morphology of MIL-88B (Fe). The highest removal of IBP was achieved in the presence of SnSFe with 0.5% SnS 2 (SnSFe0.5). Characteristic results and density functional theory calculations demonstrated that the enhanced degradation of IBP was due to the difference in Fermi energy levels of SnS 2 and MIL-88B (Fe) leading to electrons transferred from SnS 2 to MIL-88B (Fe), and Sn O bond was formed in SnSFe. , OH and O 2 − were the main active species in SnSFe0.5/PS/visible light system. Z-scheme heterojunction of SnSFe was constructed to propose the degradation mechanism. This research revealed that the synergism of photocatalysis and PS activation using SnS 2 /Fe-based MOFs composites possessed great potentials in wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Dandan Shang,Di Li,Biyi Chen,Bifu Luo,Yuanyong Huang,Weidong Shi
Covalent organic frameworks (COFs) are a category of promising materials in the field of solar-driven hydrogen (H2) evolution, but their applications are limited by the speedy recombination of photoinduced charge carriers and the absorption of marginal visible light. Herein, a 2D–2D SnS2/TpPa-1-COF heterojunction photocatalyst was prepared via a one-step hydrothermal route to relieve the abovementioned shortcomings. The results show that the obtained 2D–2D SnS2/TpPa-1-COF heterojunctions not only speed up the separation of photogenerated charge carriers but also facilitate the H2 production kinetics and expand the range of visible light response to orange light (600 nm). Especially, the maximum photocatalytic H2 production rate of the 2D–2D SnS2/TpPa-1-COF heterojunction without the addition of cocatalyst Pt reaches 37.11 μmol h–1, which is 21.7-fold and 2-fold higher than those of individual TpPa-1-COF and 3 wt % Pt/TpPa-1-COF, respectively. This work indicates that the synthesis of cheap COF-based photocatalysts for high-efficiency solar energy utilization is a feasible approach to boost the photocatalytic H2 performance.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqin Liu,Yu Xiang,Qingping Li,Qiaoji Zheng,Na Jiang,Yu Huo,Dunmin Lin
Bimetallic sulfides are considered as one of the most promising anode materials for sodium ion batteries (SIBs) due to their high conductivity and electrochemical activity. However, they still suffer from challenges such as large volume changes, low initial coulombic efficiency and poor cycling performance. Herein, we synthesize SnS 2 -CoS 2 @C (SCS@C) core-shell nanocubes with abundant mesopores through simple carbon coating and sulfidation strategies using polymeric resorcinol-formaldehyde as carbon source. The porous nanostructure of SCS@C is conducive to shortening the transport path of sodium ions and facilitating the infiltration of electrolyte, while the carbon shell can buffer volume expansion stress during charging and discharging processes. As a result, the SCS@C electrode exhibits an excellent sodium storage: an outstanding initial coulomb efficiency of 92.8%, remarkable cycling performance of 662 mAh g −1 at 100 mA g −1 after 70 cycles with extremely low capacity decay of 0.00013% per cycle, and long cycle durability of 402.5 mAh g −1 at 5 A g −1 over 500 cycles. Our study provides a viable strategy for the rational design of bimetallic sulfides anode materials with high efficiency and long term stability for sodium storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2016
·
IF 2.299
Keyu Li,Shancheng Yan,Zixia Lin,Xiubin Dai,Peng Qu
Graphene-based nanocomposites have been widely investigated as promising anode materials because of the high specific capacity and good rate capability. However, effective distributing the nanomaterials into graphene conductive network still remains some challenges. In this study, the supercritical carbon dioxide (SC-CO 2 ) route as a good strategy is developed to prepare SnS 2 /reduced graphene oxide (RGO) nanocomposites, which integrates the complementary effect of ultrasmall SnS 2 nanopaticle and RGO nanosheet in the nanocompositions. The SnS 2 /RGO nanocomposite exhibits high initial discharge capacity of 1466.1 mA h g −1 (100 mA g −1 ), good capacity retention of about 492 mA h g −1 (100 mA g −1 ) after 70 cycles and good rate capacity as an anode material for lithium ion batteries. These results demonstrate that supercritical CO 2 (SC-CO 2 ) possess significant technological value to enhance the energy storage properties of other two-dimensional (2D) nanocomposites.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）