Journal of Materials Chemistry C
·
2014
·Vol. 2
·期 24
·4812-4817
·
IF 0
Jianbing Zhang,Weipeng Sun,Liping Yin,Xiangshui Miao,Daoli Zhang
A green method for the one-pot direct synthesis of hydrophilic CuInS2 and CuInS2–ZnS colloidal quantum dots was developed employing N,N-dimethylformamide (DMF) as a solvent. Highly reactive H2S gas, in situ generated from the reaction between FeS and H2SO4, was utilized as the sulphur source for the synthesis of hydrophilic CuInS2 quantum dots. Short chain thiols were applied as ligands, reactivity controllers and sulphur sources for the growth of the ZnS shell. The growth of CuInS2 quantum dots experiences a typical Ostwald ripening process, and it should be controlled in 45 min due to the pyrolysis of the ligands. The reaction temperature should not exceed 130 °C. The ZnS shell was grown on CuInS2 quantum dots in a very simple and one-pot approach. Both the luminescence and optical stability were improved substantially after the formation of the ZnS shell. The versatility of this synthetic strategy was demonstrated by extending it to the synthesis of other metal sulphide quantum dots, for instance, CdS and ZnS quantum dots.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
ACS Nano
·
2020
·
IF 14.588
Jiajia Ning,Zonghui Duan,Stephen V. Kershaw,Andrey L. Rogach
Synthetic routes to deposit CuInS2 (CIS) shells with either a cubic chalcopyrite (CP) or a hexagonal wurtzite (WZ) phase on trigonal pyramidal-shaped CuInSe2 (CISe) core nanocrystals (NCs) with a cubic CP crystal structure have been developed and governed by tuning the amount of the sulfur precursor tert-dodecanethiol. During the synthesis of CP-CIS/CP-CISe core/shell NCs, the CP-CIS shell initially starts to grow epitaxially in a uniform way, while the further addition of the CIS precursor induces islandlike growth, and finally a branched CIS shell is formed. In a stark contrast, when a WZ-CIS shell is deposited, it initially grows on a portion of each of the facets of the trigonal pyramidal-shaped CISe cores to form a monolayer, which then continues to increase in thickness and forms a multilayered WZ-CIS shell. Both CP-CISe/CP-CIS core/shell NCs and CP-CISe/WZ-CISe core/shell NCs exhibit rather low photoluminescence quantum yields (<10%), even with a smaller-sized CISe core, which calls for further refinements of the shell growth methods. Synthetic methods for the growth of CIS shells as described here allow for direct deposition of cadmium-free ternary compounds as shell materials and provide important insights into the different modes of growth of heterostructured NCs, ranging from epitaxial to island- and branched-like, as well to the facet-specific multilayer deposition.
研究领域:
材料科学
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纳米技术
·
化学合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 69
·36875-36881
·
IF 3.708
Fengcong Gong,Shouqin Tian,Baoshun Liu,Dehua Xiong,Xiujian Zhao
Distinct from the popular opinion that only the zinc-blende CuInS2 phase could be prepared in the presence of oleic acid (OA), CuInS2 nanocrystals with different phase structures and shapes were synthesized by a facile heat-up method through simply adjusting the OA dosage. Zinc-blende CuInS2 quantum dots (QDs) with a triangular pyramidal shape were obtained at a low dosage of OA (<1 mL). With an increase in the OA dosage (∼1.5 mL), wurtzite CuInS2 hexagonal nanoplates were formed accompanied by zinc-blende CuInS2 QDs. A higher OA dosage (2–3 mL) led to the production of wurtzite CuInS2 hexagonal nanoplates. The formation of the CuInS2 nanocrystals with tunable structures was mainly attributed to the role of OA dosage in the formation and transformation of a CuIn(SR)x intermediate. A high OA dosage could facilitate the formation and crystallization of the intermediate, giving a metastable wurtzite CuInS2 structure that could be gradually converted into a stable zinc-blende CuInS2 QDs as the reaction proceeded. However, a low OA dosage would lead to low crystallinity of the intermediate, and thus the intermediate was transformed into a stable zinc-blende CuInS2 phase easily. Therefore, our work could provide guidance for the controllable synthesis of other multi-component chalcogenide nanocrystals.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·Vol. 58
·期 23
·235101
·
IF 3.2
Longhui Lei,Wenbo Cao,Jiajin Kuang,Chaofan Zheng,Mingtai Wang
A systematic investigation is conducted to determine the role of thiourea in regulating crystallization and defect formation in solution-processed CuInS2 solar cells. By modulating the Cu:In:S stoichiometry (1:1:6–1:1:10), sulfur content is found to critically influence material properties. The optimal stoichiometry (1:1:8) balances the defects density, stabilizes the chalcopyrite phase, and suppresses deleterious secondary phases, yielding a peak efficiency of 5.16% (Voc = 0.68 V, Jsc = 11.91 mA cm−2, FF = 63.52%). Excessive thiourea (1:1:10) induces defects (InCu) and (Ini), degrading device performance. These findings establish a dual mechanism for thiourea's role in solar cell performance: regulating defects concentration and crystal phase composition, providing a theoretical guide for solution-processed CuInS2 devices.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2023
·
IF 4.7
Haiyan Kang,Hongchao Geng,Sisi Shi,Zhongxian Song,Yuting Dong,Xiaole Yan,Chaohai Wang,Yanli Mao,Qingyun Cai
High concentrations of Cu 2+ exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu 2+ is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS 2 /ZnS was proposed for detection of Cu 2+ . The fluorescence intensity of CuInS 2 /ZnS quantum dots (QDs) decreased obviously after Cu 2+ were added, and the intensity with the concentration of Cu 2+ showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu 2+ in drinking water, manifesting the foreground of the current strategy.
研究领域:
生物化学
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环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 24
·6372-6383
·
IF 4.495
Wenhua Ye,Jisong Hu,Xiaofeng Hu,Wenhua Zhang,Xinguo Ma,Huihu Wang
Graphical Photocatalysis : The traditional p–n junction charges transfer mode at the interface of CuInS 2 /g-C 3 N 4 can be switched to Z-scheme mode in CuInS 2 /Au/g-C 3 N 4 heterostructure through Au integration by weakening the built-in electric field and improving the interfacial bonding. Two dimensional (2D) heterojunction based on g-C 3 N 4 and CuInS 2 (CIS) nanosheets has been successfully constructed with the assistance of biomolecules L-cysteine. We demonstrated that a typical p–n junction charges transfer mode of CIS/PCN (protonated g-C 3 N 4 ) can be switched to Z-scheme transfer mode through the integration of Au by weakening the role of built-in electric field. The morphology of CIS/Au/PCN can be well adjusted through the formation of Au−S covalent bond and the electrostatic adsorption between Au and PCN during the hydrothermal process. Furthermore, the intimate interface contact inside CIS/Au/PCN heterojunction was indeed constructed, which may promote the charges separation and transfer process at the interface as evidenced by ESR spectra and time-resolved PL spectra. Under visible light illumination, the CIS/Au/PCN exhibited an enhanced CO (19.46 μmol/g) and CH 4 (1.18 μmol/g) yield in CO 2 reduction, which was about 5.04 times and 2.03 times higher than pure PCN. The composite heterojunction also showed excellent photocatalytic activity for tetracycline degradation with a 87 % degradation efficiency in 1 hour, which was 2.07 times higher than pure PCN. The experimental and theoretical calculation results demonstrated that an all-solid-state Z-scheme heterojunction was formed in the CIS/Au/PCN system, which was different from the typical p–n junction charges transfer mechanism in CIS/PCN.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2014
·
IF 2.129
Xiaozhen Geng,Lanlan Zhai,Jianli Hu,Lulin Wang,Zhiyong Xiong,Chao Zou,Lijie Zhang,Yun Yang,Shaoming Huang
Hollow CuInS 2 microspheres with hierarchical structures were synthesized via solution-based method. The detailed HRTEM and XRD results demonstrated the presence of zincblende CuInS 2 microspheres trunks and wurtzite nanobelts attached onto the microspheres. As it was found, oxygen had decisive effect on the formation of CuInS 2 microspheres. Detailed investigation indicated the growth of hierarchical structured CuInS 2 microspheres simultaneously underwent two different mechanisms, phase transformation for zincblende CuInS 2 microspheres and catalytic growth for wurtzite CuInS 2 nanobelts.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 42
·22619-22623
·
IF 5.968
Yuhan Lin,Fang Zhang,Daocheng Pan
A series of (ZnS)x(CuInS2)1−x hierarchical micro/nano-structured solid solutions with precisely controlled chemical composition were synthesized via a facile one-pot solvothermal method. ZnO, Cu2O, and In(OH)3 are used as the starting materials and dissolved in ethanol dithiocarbamic acid which is formed from CS2 and ethanolamine in situ. The ethanol dithiocarbamic acid not only serves as a thermally-degradable ligand, but also acts as sulfur source during synthesis, and can be completely removed by a simple calcination process. As-prepared (ZnS)x(CuInS2)1−x microspheres have a hierarchical micro/nano structure composed of around 7 nm nanoparticles. These samples show excellent photocatalytic H2 evolution activity under visible-light irradiation without any noble metal loading owing to their high surface area (as high as 101.6 m2 g−1) and unique hierarchical structure.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 12
·3163-3169
·
IF 5.106
Jinman Yang,Xingwang Zhu,Zhao Mo,Jianjian Yi,Jia Yan,Jiujun Deng,Yuanguo Xu,Yuanbin She,Junchao Qian,Hui Xu,Huaming Li
We fabricated a multidimensional heterostructured In2S3–CuInS2 photocatalyst to convert CO2 to CO. The hybrid photocatalyst can be obtained by using an In-containing MOF as a precursor followed by sulfidation and ion exchange. Moreover, the multidimensional structure, a 2D nanosheet semiconductor distributed on 1D hollow nanotubes, inhibits the recombination of charge carriers, increases CO2 adsorption and affords a large surface area promoting exposure of plentiful active sites. As a result, the as-synthesized optimal heterostructured In2S3–CuInS2 display a excellent activity with the CO evolution rate of 19.00 μmol g−1 h−1 over the under visible light irradiation, which is roughly four times higher than that of pristine In2S3. This work might pave the way for increasing the performance of metal sulphide photocatalysts by MOF-guided chemistry.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ying Wang,Jiaru Peng,Yangfan Xu,Ruiyang Zhao,Jishu Han,Lei Wang
Photocatalytic water splitting to produce hydrogen has attracted extensive attention and exhibited broad development prospects. In this work, CuInS 2 microflowers were fabricated through the solvothermal method , and decorated with CdSe quantum dots on the surface. As-prepared CdSe/CuInS 2 microflowers exhibited high photocatalytic hydrogen production activity (10610.37 μmol g −1 h −1 ) and high AQE of 48.97% at 420 nm. The enhanced photocatalytic hydrogen production activity owing to the construction of p-n heterostructure improved light absorption ability, increased electrons transfer efficiency and reduced recombination of photo-induced electrons and holes. Moreover, high stability and cyclic utilization of CdSe/CuInS 2 microflowers were beneficial to photocatalytic hydrogen production application.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wenxiang Yang,Guozhi Ma,Yin Fu,Ke Peng,Hongli Yang,Xiaoqiang Zhan,Weiyou Yang,Lin Wang,Huilin Hou
The development of novel and efficient heterojunction photocatalysts is still a challenging issue for achieving highly efficient solar-to-chemical energy conversion. Herein, we report the construction of Ti 3 C 2 MXene@TiO 2 /CuInS 2 (M@T/CIS) integrated Schottky/step-scheme (S-scheme) heterojunction by two-step hydrothermal process for boosting photocatalytic hydrogen generation activity. The as-prepared M@T/CIS hybrid photocatalysts exhibit the synergistic effects for enhanced visible-light harvesting, improved charge transfer and increased active site for photocatalytic H 2 evolution. They deliver a H 2 evolution rate of 356.27 μmol g -1 h −1 , which is ∼ 69 and 636 times higher than those of M@T and CIS, respectively, representing their potential applications towards photocatalytic H 2 evolution.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Results in Chemistry
·
2020
·
IF 0
Jiajia Fang,Beina Dong,Yingqiang Fu,Dingxing Tang
Thioglycolic acid-modified CuInS 2 quantum dots were prepared by a hydrothermal method. A method for the determination of sparfloxacin by a CuInS 2 ternary-quantum dot fluorescence probe was established based on the fact that the fluorescence of CuInS 2 quantum dots can be significantly quenched by sparfloxacin. The optimized experimental conditions are as follows: (1) the concentration of CuInS 2 quantum dots is 0.4 mol·L − 1 ; (2) the pH of the buffer solution is 6, and 1 mL of buffer was used; (3) the reaction time is 5 min. The concentration of sparfloxacin is linearly related to the fluorescence quenching intensity from 0.5 μg/mL to 1 mg/mL, and the maximum detection limit is 1 mg/mL.
研究领域:
分析化学
·
纳米技术
·
药物分析
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）