CRYSTENGCOMM
·
2014
·Vol. 16
·期 32
·7469-7477
·
IF 3.858
Chenghui Xia,Lixin Cao,Wei Liu,Ge Su,Rongjie Gao,Hua Qu,Liang Shi,Guanghui He
This paper aims to systematically optimize the preparation process of CuInS2 (CIS) QDs by intensively manipulating kinetic variables including reaction temperature, reaction time, In/Cu ratio and surface ligand. CIS QDs were synthesized using copper iodide and indium acetate in the presence of 1-octadecene (ODE) that was used as reaction solvent, while 1-dodecanethiol (DDT) was chosen as the sulfur source and surface ligand. UV-Vis spectroscopy and fluorescence spectroscopy were applied to reveal the growth kinetics and fluorescence properties of CIS QDs. Transmission electron microscopy and X-ray diffraction were utilized to characterize the size, morphology and crystal structure of the final products. Our results reveal that the emission wavelength of CIS QDs could be found at visible light and near-infrared regions ranging from 630 to 825 nm. By scrupulous regulation of the reaction temperature, reaction time and the amount of DDT, highly dispersed and stable hydrophobic CIS QDs could be prepared directly without any further modification by one-step method. The fluorescence intensity could be enhanced by introducing Cu defects with the fluorescence quantum yield (QY%) reaching around 7%, while the particle size could be tuned from ultra-small sizes approaching 1.5 nm to 4 nm, by controlling the In/Cu ratio.
研究领域:
材料科学
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纳米技术
·
光学
✓ 已验证
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
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2015
·Vol. 31
·期 7
·1331-1337
·
IF 0.852
WANG Nan,LIANG Zhu-Rong,WANG Xin,XU Xue-Qing,FANG Jun,WANG Jun-Xia,GUO Hua-Fang
Colloidal chalcopyrite CuInS2 (CIS) quantum dots (QDs) were synthesized using copper(I) iodine (CuI) and indium(III) acetate (InAc3) as metal cationic precursors, and dodecanethiol (DDT) as the sulfur source and solvent. The microstructure and optical properties of the prepared
CIS QDs were characterized by X-ray diffraction (XRD), Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), and UVVis absorption spectroscopy. The results showed that the CIS consisted of chalcopyrite phase and exhibited Cu-Au ordering. With prolonged reaction time,
the grain sizes of the QDs became larger and the absorption edges of the CIS QDs showed a red-shift owing to the size-induced quantum confinement effect. For the first time, DDT-capped CIS QDs with narrow size distribution were connected to the inner surface of mesoporous TiO2 films
via a thioglycolic acid (TGA)-assisted adsorption approach, which was simple and easy to carry out. The adsorption behaviors of both TGA and the CIS QDs on the TiO2 films were detected by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The results
indicated that TGA was adsorbed onto the surface of TiO2
via COOH groups while the ―SH group was exposed outside, and replaced DDT at the surface of the CIS QDs, leading to the attachment between TiO2 and CIS. It was revealed that the CIS QDs of ~3.6 nm
in size exhibited the best light absorption capacity and photovoltaic performance. An over-coating of CdS significantly improved the performance of the QDS
研究领域:
材料科学
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纳米技术
·
太阳能电池研究
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huining Zhang,Zongqian Zhang,Yuling Tang,Jianping Han,Zhiguo Wu,Zhiqiang Wei,Shaofeng Wang,Yang Cao,Seng Zhang,Yue Zhang
This study focuses on a novel ternary heterojunction catalyst for the removal of 2,4-dichlorophenol (2,4-DCP), an organic pollutant that is difficult to degrade. An efficient CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalyst was formed by constructing a CuInS 2 /BiOI composite layer on a Bi 2 MoO 6 substrate using an in-situ growth technique. The microstructure and photoelectric conversion properties of the catalysts were comprehensively resolved by systematic material characterization, including scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS) analysis and photoelectrochemical testing. The experimental results showed that the optimized catalyst at a loading of 2.0 g/L exhibited excellent photocatalytic degradation efficiency against 20 mg/L concentration of 2,4-DCP at neutral pH, reaching 80.3 % degradation rate in 120 min. This high performance was mainly attributed to the enhanced charge-carrier separation mechanism at the heterojunction interface, which effectively enhanced the utilization and transfer rate of photogenerated electron-hole pairs and enhanced the photocatalytic activity of the catalyst. In addition, the study also deeply explored the conversion pathway of elemental chlorine in the photocatalytic system, elucidated the mechanism of 2,4-DCP degradation and dechlorination, and provided a theoretical basis for further improving the environmental adaptability and dechlorination efficiency of the catalyst. Overall, the CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalysts proposed in this study demonstrate a broad application prospect in the purification of 2,4-DCP and other organic pollutants, and open up a new way to solve the problems of industrial wastewater treatment, which is of great environmental significance and scientific value.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuqing Chang,Yan Feng,Yuncai Zhao,Yanghe Fu,Huilin Jia,Yijing Gao,Fumin Zhang,Rui Ma,Xinqing Lu,Maohong Fan,Weidong Zhu
The application of covalent organic frameworks (COFs) for the photocatalytic reduction of CO2 is mostly limited by severe charge recombination and low sunlight utilization. Herein, a triazine-based COF with an electron-rich and large π-conjugated system (TCOF) was employed as a building block and integrated with CuInS2 (CIS) to construct a noble-metal-free and high-efficiency photocatalyst for CO2 reduction. The in situ growth of CIS nanosheets on TCOF creates a p–n heterojunction, named CIS@TCOF. Compared with TCOF, the CIS@TCOF heterostructure exhibits a dramatically boosted photocatalytic performance in the reduction of CO2. The produced HCOOH yield over 10 wt % CIS@TCOF can be up to 171.2 μmol g–1 h–1 under visible light irradiation with good reproducibility, which is about 3 times as high as that over TCOF. Further in-depth studies indicate that the introduction of CIS not only enhances the visible light utilization but also restrains the recombination of photogenerated electron–hole pairs efficiently and facilitates the photoinduced charge transfer via the p–n heterojunction system due to the unique structural and compositional features. This research shows the great potential of COFs as efficient photocatalytic carbon fixation materials and provides a versatile route to construct semiconductor-COF heterostructures for photocatalysis.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 10
·13908-13914
·
IF 4.672
Zhenlong Zhang,Wenbo Ma,Qing Zhou,Yanli Mao
Summary In this work, we construct a double inorganic hole extraction layer (HEL) of Cs:NiO x /CuInS 2 by inserting a thin film of Cs:NiO x between the perovskite (FAPbI 3 ) 1-x (MAPbBr 3 ) x and CuInS 2 layers and fabricate n-i-p type perovskite solar cells (PSCs) using Cs:NiO x /CuInS 2 as HEL. The efficiency of the PSCs with Cs:NiO x /CuInS 2 reaches 18.04% from 16.13% for the devices with single HEL of CuInS 2 , which is close to the highest efficiency (19.24%) of the devices with double inorganic HEL reported. In addition, the operational stability of the devices with Cs:NiO x /CuInS 2 is enhanced. The solar cells based on double HEL of Cs:NiO x /CuInS 2 maintains 95% of the original PCE after keeping 32 days in ambient air, while the devices based on single HEL of CuInS 2 keeps only 84% of the original PCE. In addition, the thermal stability of the PSCs with Cs:NiO x /CuInS 2 is also enhanced compared with the devices based on CuInS 2 . The results demonstrate that the application of double HEL of Cs:NiO x /CuInS 2 can enhance the performance and stability of PSCs simultaneously.
研究领域:
材料科学
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能源技术
·
光电转换
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Lijia Wang,Wenhong Gu,Pengtao Sheng,Zhiwei Zhang,Bing Zhang,Qingyun Cai
CdS/CuInS 2 /Au/TiO 2 nanotube arrays (NTAs) were fabricated by deposition and dipping technique as well as successive ionic layer adsorption and reaction method, where Au nanoparticles were used to improve the interfacial electron transfer and quantum dots (QDs) of CdS and CuInS 2 (4.1 nm) to stimulate the formation of an ideal stepwise band edge structure with TiO 2 . High and stable photocurrent responses were observed on the NTA electrode. A photoelectrochemical aptasensor toward cytochrome c (cyt c) was then fabricated by immobilization of HS-aptamer on the NTAs via Cd-S bond and Cu-S bond. Sensitive and selective detection of cyt c was achieved with a detection range of 5 pM to 100 nM.
研究领域:
生物化学
·
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Guoshuai Wang,Huiyun Wei,Jiangjian Shi,Yuzhuan Xu,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Aiming at improving the cell performance of colloidal CuInS 2 (CIS) quantum dot sensitized solar cells (QDSCs), a modified synthetic method has been developed to prepare CIS quantum dots (QDs), and Cu/In non-stoichiometric ratios of CIS QDs have been carefully controlled for the first time. It is found that, with the amount of In element increasing, the short-circuit photocurrent density ( J sc ), open-circuit voltage ( V oc ) and fill factor ( FF ) of CIS QDSCs will gradually increase, leading to the cell performance enhanced. Up to 8.54% PCE has been achieved when the Cu/In precursor molar ratio is 1/4, which is a new record for the CIS-based solar cells. Electrochemical impedance analysis, open-circuit voltage-decay (OCVD) and time-resolved photoluminescence analyses further confirm that In-rich CIS QDs can bring about surface defect states significantly reduced, thus leading to the charge recombination at TiO 2 /CIS/electrolyte interfaces efficiently inhibited. Interfacial electron recombination mechanism of the solar cells is proposed that photo-generated carrier recombination in the cell is mainly dominated by the electron transfer process from the conduction band of TiO 2 to unoccupied defect states of CIS, which has a great influence on the FF of the device. This work provides a new and simple way to reduce the loss of photo-generated carriers, improve the interfacial carrier collection and achieve highly efficient QDSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 12
·8227-8237
·
IF 3.9
Xiaofei Fu,Junwu Tao,Zizhou Zhao,Siwen Sun,Lin Zhao,Zuming He,Yong Gao,Yongmei Xia
Reducing the recombination rate of photoexcited electron–hole pairs is always a great challenging work for the photocatalytic technique. In response to this issue, herein, a novel Z-scheme CuInS2/In2O3 with interfacial S–O linkages was synthesized by a hydrothermal and subsequently annealing method. The Fourier transform infrared (FT-IR) and X-ray photoelectron spectrometer (XPS) measurements confirmed the formation of covalent S–O bonds between CuInS2 and In2O3. The quenching and electron spin resonance (ESR) tests revealed the Z-scheme transfer route of photogenerated carriers over the CuInS2/In2O3 heterojunctions, which was further verified theoretically via density functional theory (DFT) calculations. As expected, the CuInS2/In2O3 heterojunctions showed significantly boosted photocatalytic activities for lomefloxacin degradation and Cr(VI) reduction under visible light illumination compared with the bare materials. Accordingly, a synergistic photocatalytic mechanism of Z-scheme heterostructures and interfacial S–O bonding was proposed, in which the S–O linkage could act as a specific bridge to modify the Z-scheme manner for accelerating the interfacial charge transmission. Furthermore, the CuInS2/In2O3 heterojunction also exhibited excellent performance perceived in the stability and reusability tests. This work provides a new approach for designing and fabricating novel Z-scheme heterostructures with a high-efficiency charge transfer route.
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
Catalysts
·
2025
·Vol. 15
·期 1
·69
·
IF 4
Yuning Liang,Baohui Wang,Tao Cheng,Mingchun Bi,Weimeng Chi,Yuxi Liu,Wenjing Zhang,Yuxuan Liu
A novel dual Z-scheme heterojunction photocatalyst was constructed by introducing the narrow-bandgap semiconductor CuInS2(CIS) into the dual metal-organic framework (MOF) system of UiO-66(Zr) and NH2-MIL-101(Fe). This structure effectively overcomes the limitations of conventional photocatalysts in terms of light absorption range and the separation efficiency of photogenerated charge carriers. The prepared ternary catalyst, (UiO-66(Zr))-(NH2-MIL-101(Fe))/CuInS2, exhibited excellent photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 888 μmol g−1h−1and a methylene blue (MB) degradation efficiency of up to 95.03%. The significant enhancement in performance is attributed to the material’s porous structure, extended light absorption range, and optimized electron transfer pathways. Additionally, the construction of the dual Z-scheme heterojunction further promotes the separation and migration of photogenerated charge carriers, suppressing electron–hole recombination. This study demonstrates the great potential of dual Z-scheme heterojunctions in improving photocatalytic efficiency and provides an important theoretical foundation and design strategy for the development of efficient photocatalysts.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Yanyan Liu,Zhenlong Zhang,Huiping Gao,Huafang Zhang,Yanli Mao
Perovskite solar cells (PSCs) have attracted more attentions in recent decade, and the power conversion efficiency (PCE) has reached 24.2%. While some issues such as cost and stability must be solved for commercialization. One of the most effective ways is to develop inorganic hole-transporting materials (HTMs) for PSCs. In the present work, CuInS 2 quantum dots (CIS QDs) were synthesized using a modified hot-injection method and applied to PSCs as an HTM. A high value of PCE (18.8%) for the optimized solar cells with CuInS 2 as an HTM was achieved, which was very close to the PCE of a device with Spiro-OMeTAD as an HTM (19.2%). Moreover, the stability of CuInS 2 -based solar cells was greatly improved compared to those made with Spiro-OMeTAD. The PCE of CuInS 2 -based solar cells only decayed by 9% of the original value after 30 days, while that of the solar cells based on Spiro-OMeTAD decayed dramatically by 33% of the original value within 15 days. These results in this study demonstrate that CuInS 2 is a promising inorganic hole-transporting material for the fabrication of PSCs with high PCE and improved stability.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Qingfeng Cui,Xinyue Gu,Yue Zhao,Kezhen Qi,Ya Yan
Background In last few years, the researchers from different communities are focusing the wastewater treatment of medical and aquaculture industry. More importantly, the antibiotic released from the hospitals and aquaculture badly effecting water bodies. Methods In this work, a series of CuInS 2 /ZnS (CIS/ZnS) heterojunction nanomaterials are prepared through solvothermal method and analyzed using different techniques. The photocatalytic behavior of CIS/ZnS heterojunctions in the degradation of tetracycline hydrochloride (TCH) is investigated under visible light irradiation. Significant findings The results show that up to 86% of TCH degrades in 3 h with the optimized CIS/ZnS(1:2) sample. The enhanced photocatalytic activity is attributed to the formation of S-scheme heterojunctions, which promotes charge separation and transportation in CIS/ZnS composite materials. The photocatalytic mechanism is elucidated based on the electron paramagnetic resonance technique, optical properties and charge/radical trapping experiments. The visible-light absorption ability is enhanced, and superoxide radical ( • O 2 − ) is confirmed to be one of the main active species according to active substance capturing experiments. The high stability of CIS/ZnS composite provides a new way to design effective photocatalysts for the eradication of hazardous materials from environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Bing Deng,Yanqing Zhu,Jingling Li,Xia Chen,Kun He,Juan Yang,Kaili Qin,Zhuoneng Bi,Xiudi Xiao,Shuaijun Chen,Xueqing Xu,Gang Xu
In this study, an efficient green light-emitting CuInS 2 /ZnS core/shell quantum dots were synthesized using a low temperature (130 °C) hot injection methods combined with multi-layers ZnS coating strategy. S-OAm (S powder dissolved in oleylamine) was used as sulfur source instead of conventional dodecanethiol, which supplied high concentration of H 2 S at low temperature and led to explosive nucleation of CuInS 2 and hence high concentration small size of CIS cores. Meanwhile, this method could supply enough sulfur sources for the ZnS coating process , resulting in high quality ZnCuInS 2 alloyed interface and ZnS surface coating layers, which led to excellent lattice match between the CuInS 2 core and ZnS shells, and better surface passivation . As the consequence, a maximum photoluminescence quantum yields of ∼85% at peak wavelength of ∼530 nm has been achieved. Based on this, the light emitting diodes with a maximum luminance of 4450 cd m −2 , luminous efficiency of 3.52 cd A −1 and an external quantum efficiency of 1.44% has been obtained, which is the best result so far for the green emission light emitting diodes based on the CuInS 2 quantum dots.
研究领域:
材料科学
·
光电技术
✓ 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）