CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Haijing Gao,Yajie Chen,Huali Li,Fangfang Zhang,Guohui Tian
Copper-based chalcogenides have been paid intensive attention as alternate photothermal catalysts for solar energy conversion. Despite considerable progress of copper sulfides nanostructure fabrication, combining independent copper sulfides polymorphs with various stoichiometries by forming heterojunction is still challenging. Herein, unique hierarchical nanosheet-assembled Cu 7 S 4 -Cu 9 S 8 heterostructure hollow cubes with remarkable photothermal aerobic oxidation activity were prepared by a facile onepot chemical transformation route using Cu 2 O cubes as sacrificial template for the first time. In this reaction system, the introduction of proper sulfur source thioacetamide and moderate alkaline conditions plays a crucial role in phase transformation, and through tunning the reaction time, a series of Cu 7 S 4 , Cu 7 S 4 -Cu 9 S 8 , and Cu 9 S 8 can be selectively prepared. Furthermore, the Cu 7 S 4 -Cu 9 S 8 polymorphic heterostructure hollow cubes exhibit significantly enhanced photothermal aerobic oxidation performance of amines to the corresponding imines compared with the individual Cu 7 S 4 and Cu 9 S 8 in both N , N -dimethylformamide and acetonitrile solvent medium. Our results indicated that the strong near-infrared plasmonic absorption of Cu 7 S 4 -Cu 9 S 8 facilitated hot carrier transport between Cu 7 S 4 and Cu 9 S 8 , which subsequently promoted the catalytic reactions. Especially after uniform load of Au-Pt alloy nanoparticles, the photothermal aerobic oxidation activity was further enhanced due to their boosted synergistic local coupling enhancement effect between distinct components in the N , N -dimethylformamide solvent medium. Such enhanced photothermal reaction could effectively promote sunlight utilization in a wide range of photocatalytic reactions.
研究领域:
材料科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2015
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IF 4.457
Yong-Qiang Liu,Hao-Di Wu,Yu Zhao,Ge-Bo Pan
Foreign ions are of significant importance in controlling and modulating the morphology of semiconductor nanocrystals during the colloidal synthesis process. Herein, we demonstrate the potential of foreign metal ions to simultaneously control the morphology and crystal phase of chalcogenide semiconductors. The results indicate that the introduction of Al3+ ions can induce the structural transformation from monoclinic CuClSe2 microribbons (MRs) to klockmannite CuSe nanosheets (NSs) and the growth of large-sized CuSe NSs. The as-prepared micrometer-sized CuSe NSs exhibit a high-conducting behavior, long-term durability, and environment stability. The novel properties enable CuSe NSs to open up a bright prospect for printable electrical interconnects and flexible electronic devices.
研究领域:
材料科学
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半导体物理
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhenyu Hu,Li Lin,Yi Jiang,Lianshan Sun,Qingshuang Wang,Jianxun Zhao,Peng Chen,Xinwei Wang,Heng Liu,Wanqiang Liu,Chunpeng Yang,Fang Wang,Wei Liu
The aqueous zinc ion battery (AZIB) has been widely studied due to its rapid kinetics and high specific capacity attributed to the chemical insertion of H + protons. However, the current research landscape lacks comprehensive investigations into copper-based sulfide materials and the intricate co-embedding/extraction mechanism of H + /Zn 2+ . In this study, we employed an innovative in-situ etching method to synthesize a current collector-integrated Cu@Cu 31 S 16 cathode material. Cu 31 S 16 not only exhibits excellent stability and conductivity but also activates proton insertion chemistry. Consequently, we have demonstrated, for the first time, efficient and reversible co-embedding/extraction behavior of H + /Zn 2+ in Zn-Cu 31 S 16 batteries. Specifically, owing to the lower charging and discharging plateaus of zinc ions (0.65 V, 0.45 V) compared to H + (0.97 V, 0.84 V) in Zn-Cu 31 S 16 batteries, two distinct plateaus were observed. Moreover, we delved into the mechanism of ion co-embedding/extraction by exploring different ions (Zn 2+ , H + /Zn 2+ , H + ) within varying voltage ranges. This exploration led to the development of three types of ion batteries, where Zn 2+ , H + /Zn 2+ , and H + exhibit co-embedding/extraction within voltage ranges of 0.3–0.9 V, 0.3–1.05 V, and 0.5–1.05 V, respectively. These batteries have achieved impressive performance with specific capacities of 282.74 mAh g −1 , 587.4 mAh g −1 and 687.3 mAh g −1 , respectively. Introducing the concept of “Voltage-Selective Ion Co-Embedding/Extraction”, this study broadens the research scope of AZIBs . This research not only offers a feasible solution and theoretical guidance for future proton batteries but also underscores the tremendous potential of AHPB.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 10
·6111-6120
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IF 6.895
Dongxu Zhu,Haihang Ye,Zheming Liu,Jun Liu,Hao Fu,Yanbin Huang,Feng Teng,Zhijie Wang,Aiwei Tang
Multinary copper-based chalcogenide nanocrystals (NCs) as light-driven photocatalysts have attracted extensive research interest due to their great potential for generating sustainable energy without causing environmental concerns. However, systematic studies on the growth mechanism and related photocatalytic activities involving different valent metal ions (either M2+ or N3+) as foreign cations and monoclinic Cu1.94S NCs as the ‘parent lattice’ have rarely been carried out. In this work, we report an effective seed-mediated method for the synthesis of heterostructured Cu1.94S–MS NCs (M = Zn, Cd and Mn) and alloyed CuNS2 NCs (N = In and Ga). A typical cation exchange process took place prior to the growth of heterostructured NCs, while further inter-cation diffusion occurred only for the alloyed NCs. When compared with Cu1.94S NCs, all the heterostructured Cu1.94S–MS NCs and CuGaS2 NCs showed enhanced photocatalytic activities toward hydrogen production by water splitting, owing to their tailored optical band gaps and energy level alignments. Although optically favored, CuInS2 ANCs were not comparable to others due to their low conduction band minimum for the reduction of H2O to H2.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Jiajia Ning,Yuan Xiong,Fei Huang,Zonghui Duan,Stephen V. Kershaw,Andrey L. Rogach
A range of different copper-based sulfide shells, such as CuInS2, CuInZnS2, CuInS2-xSex, and CuInZnS2-xSex, have been grown on CuInSe2 (CISe) nanocrystals (NCs) in order to improve their photoluminescence quantum yield (PLQY). Starting from initial CISe core NCs with PLQY of 0.4%, the deposition of the CuInS2 shell has increased the PLQY to 4.5%, while introducing Zn or Se elements into the CuInS2 shell to form cation-alloyed CuInZnS2 or anion-alloyed CuInS2-xSex shells improved their PLQYs to 8% and 11%, respectively. Limitations on PLQY for the mentioned shell materials were related to the lattice mismatch with the CISe core material, and the band gap alignment in the core/shell NCs for quasi type-II nanostructures. This could be mitigated by growing a multinary CuInZnS2-xSex shell on the CISe core NCs, which resulted in further improvement of their PLQY to 20% for the emission centered at 920 nm. This study offers guidance for the rational selection of copper-based sulfide shell materials that are able to significantly improve the PLQY of heavy-metal free CISe NCs in the near-infrared spectral range of 834–1028 nm, which is relevant for biological labeling, optoelectronics, and sensing.
研究领域:
材料科学
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光学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
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