SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Tao Wang,Qiuyue Men,Xiqing Liu,Hongquan Zhan,Yongqing Wang
0D/2D interface heterostructure of 0D CuInS 2 and 2D NiAl-LDH were obtained via strong interfacial contact. Mott-Schottky analysis confirmed both materials were n-type feature. Thus, a staggered n-n heterojunction was formed via the balance of Fermi level. This 0D/2D composite exhibited enchantable activity for photocatalytic degradation 2,4-Dichlorophenol under visible-light illumination, far superior than pure CuInS 2 and NiAl-LDH. The improvement of photocatalytic performance mainly attributed to the large BET surface area and interfacial contact, which resulted in more active sites, effective charge separation and transfer. Moreover, the optimal CuInS 2 /NiAl-LDH composite showed higher photostability for cycle experiments. At the same, the possible photocatalytic reaction process was proposed based on the trapping experiments, ESR technique and band position. This work provided a theory and foundation for designing and preparing of 0D/2D heterostructure system for photocatalytic application.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2024
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IF 3
Yushan Li,Jiao Men,Guangyan Zhou,Yanhong Qiao,Jingbo Zhang
To reveal the ways and causes of conversion efficiency enhancement for quantum dot-sensitized solar cells (QDSSCs), chalcopyrite structure CuInS 2 quantum dots (QDs) was synthesized in oil phase by the high temperature hot injection method. Then, QDs were transferred from oil phase to water phase with 3-mercaptopropionic acid as a ligand exchange reagent and loaded inducer of QDs. 3-mercaptopropionic acid coated QDs in water phase were sensitized on TiO 2 nanocrystalline thin films to fabricate QDSSCs. The sensitization time of QDs and pH value in QDs solution are two important factors to affect the loading amounts of QDs and performance of the final assembled QDSSCs. Long-time sensitization of QDs on the TiO 2 porous thin film will cause QDs to agglomerate and stack on the film. The pH of QDs aqueous solution influences the stable existence in solution of QDs and adsorption on the surface of TiO 2 . By balancing the influence of the above two factors, the optimal sensitization condition of CuInS 2 QDs is adsorption in pH = 11 QDs solution for 2 h. In addition, the interface between QD-sensitized TiO 2 porous thin film and FTO is another factor to affect the photoelectric conversion efficiency of QDSSCs. By adding Zn-doped TiO 2 compact layer with high conductivity and electron mobility on QDSSCs to modify this interface, the photoelectric conversion efficiency of QDSSCs was further increased by 66.4 %.
研究领域:
材料科学
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纳米技术
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太阳能
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化学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 5
·1829-1839
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IF 4.478
Yi Jinquan,Chen Xiaoping,Lin Jianwei,Song Kai,Han Zhizhong,Chen Jinghua
In this work, we designed new dual-mode “turn-on” electrochemical (EC) and photoelectrochemical (PEC) sensors for the detection of dopamine (DA) based on 0D/2D/2D CuInS 2 /ZnS quantum dot (QD)–black phosphorous nanosheet (BPNS)–TiO 2 nanosheet (TiO 2 NS) nanocomposites. QDs can not only improve the photocurrent of the developed PEC sensors, but also provide the electrochemical signal in the EC detection. BPNSs as p-type semiconductor with high conductive properties work as electron acceptors and are utilized to improve the sensitivity of the DA PEC and EC sensors. Under irradiation of visible light or the applied voltage, DA is both excited and releases electrons, realizing “turn-on” detection. The PEC sensors have a linear range of 0.1–100 μM with a lower detection limit of 0.028 μM. For the EC detection, BPNSs can accelerate electron transfer which attribute to its excellent conductivity. In the range of 1–200 μM, the working curve of DA detection by the EC sensors was established and the detection limit is 0.88 μM. Comparing the two methods, the PEC sensors have a lower detection limit, and the EC sensors have a wider monitoring range. The dual-mode sensors of EC and PEC pave an effective way for the detection in biological and medical fields. Graphical abstract
研究领域:
分析化学
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材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Science Bulletin
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2024
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IF 18.8
Guanshun Xie,Le Liao,Jie Wang,Peng Zhang,Benhua Xu,Xiuqiang Xie,Chi Chen,Babak Anasori,Nan Zhang
Selective CO 2 -to-CO photoreduction is under intensive research and requires photocatalysts with tuned microstructures to accelerate the reaction kinetics. Here, we report CuInS 2 nanosheet arrays with sulfur vacancies (V S ) grown on the two-dimensional (2D) support of Ti 3 C 2 T x MXene for CO 2 -to-CO photoreduction. Our results reveal that the use of Ti 3 C 2 T x induces strong support effect, which causes the hierarchical nanosheet arrays growth of CuInS 2 and simultaneously leads to charge transfer from CuInS 2 to Ti 3 C 2 T x support, resulting in V S formed in CuInS 2 . The strong support effect based on Ti 3 C 2 T x is proven to be applicable to prepare a series of different metal indium sulfide arrays with V S . CuInS 2 nanosheet arrays with V S supported on Ti 3 C 2 T x benefit the photocatalytic selective reduction of CO 2 to CO, manifesting a remarkable over 14.8-fold activity enhancement compared with pure CuInS 2 . The experimental and computational investigations pinpoint that V S of CuInS 2 resulting from the support effect of Ti 3 C 2 T x lowers the barrier of the rate-limiting step of *COOH → *OH + *CO, which is the key to the photoactivity enhancement. This work demonstrates MXene support effects and offers an effective approach to regulate the atomic microstructure of metal sulfides toward enhancing photocatalytic performance.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2011
·Vol. 132
·期 2
·313-317
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IF 1.797
Dongsheng Li,Yu Zou,Deren Yang
Luminescent CuInS 2 nanocrystals have been synthesized in dodecanethiol using air-stable precursors. The nanocrystals were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy . The optical properties of the CuInS 2 nanocrystals can be controlled by changing the reaction conditions, such as reaction time, temperature, and addition of ligands. It was found that the steady-state photoluminescence spectrum of the close-packed CuInS 2 nanocrystals on glass substrate peaked at longer wavelength than that of the colloidal ones and the close-packed nanocrystals possessed a shorter luminescence decay time. This behavior was explained on the basis of Förster resonant energy transfer due to the shorter distance between nanocrystals on substrate.
研究领域:
纳米材料
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光电子学
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半导体纳米晶
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光物理
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
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2015
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IF 1.981
Jingwei Ma,Mingming Liu,Zhichun Li,Liang Li
CuInS 2 quantum dots are considered near-ideal fluorophores based on their bright emission and low toxicity. However, CuInS 2 quantum dots are still bothered by their sensitivity to surface chemistry and chemical environment. Traditionally, the CIS QDs require an additional coating process to be encapsulated inside silica sphere or organic polymer. Up till now, few works have been made concerning improving the intrinsic stability of CIS QDs . In an effort to improve the stability of CuInS 2 quantum dots, we came up with a new method by increasing the ZnS shell thickness. These QDs were characterized by photoluminescence, HRTEM, XRD and XRF analysis. We investigated the influence of ZnS shell thickness on the ambient stability of CIS/ZnS QDs. The results demonstrated that a thicker ZnS shell helped significantly improve both photostability and chemical stability of the QDs. Finally, the thick shell QDs were dispersed into transparent polymer matrix and fabricated into a LED device, which also gave much more stability compared with conventional QDs.
研究领域:
纳米材料
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光物理
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光电子学
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材料科学
✓ 已验证
DOI
高影响因子
ACS Nano
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2026
·
IF 17.3
Xiangda Deng,Wenxin Yang,Tianmin Wu
CuInS2 quantum dots (CIS QDs), with tunable photoluminescence spanning from the visible to near-infrared (NIR) region, hold significant potential for consumer electronics and bioimaging due to their favorable photophysical properties and absence of toxic elements. However, their intrinsic lack of short-wavelength emission has hindered their use in white light-emitting applications. Herein, we report a facile synthesis of zinc–acetate–oleylamine (Zn–Ac–OAm) and oleylamine (OAm)-coencapsulated CIS/ZnS QDs that deliver full-spectrum sunlight-like emissions, characterized by a distinct 455 nm peak and an ultrabroad full width at half-maximum (fwhm) of 241 nm. The Zn–Ac–OAm emitter produces blue-green fluorescence, effectively compensating for the short-wavelength deficiency of the CIS/ZnS QDs. More importantly, strong interactions between Zn–Ac–OAm and CIS/ZnS QDs enable efficient energy transfer within coencapsulated structures. As a proof of concept, white light-emitting diodes (WLEDs) fabricated using these coencapsulated CIS/ZnS QDs exhibit excellent photophysical performance, achieving a high color rendering index (CRI) of 92.1 and external quantum efficiency (EQE) of 7.2%. This coencapsulation strategy, together with the elucidated photophysical mechanisms, provides viable pathways for extending the application of long-wavelength-emitting nanomaterials in next-generation lighting and display technologies.
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2014
·Vol. 16
·期 12
·1-8
·
IF 2.278
Li Jinjie,Shen Huaibin,Zhou Changhua,Li Ning,Wang Hongzhe,Li Lin Song
We report a facile method for the synthesis of size-controlled triangular CuInS 2 (CIS) semiconductor nanocrystals (NCs) in the organic phase, and then, molecular metal chalcogenide complexes capped CIS NCs can be synthesized by exchanging original organic compounds with (NH 4 ) 4 Sn 2 S 6 inorganic ligands in environmentally benign solvent. The properties of CIS NCs (coated by both organic and inorganic ligands) were characterized by UV–Vis spectroscopy, fourier transform infrared, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, and dynamic light scattering. CuInS 2 NCs (before and after ligand exchange) films were spin coated on cleaned ITO glass substrates, and the charge transport properties were detected by current-voltage characteristic. We observed that the ligands on the surface of CIS NCs have been exchanged successfully, and the electrical transparency of (NH 4 ) 4 Sn 2 S 6 -CIS NCs films was obviously increased than CIS NCs with organic capping ligands.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Minghao Zhou,Shijiao Zhang,Yanlai Wang
By employing semiconductor composite strategies and morphology control, Zn-doped CuInS 2 quantum dots with a ZnS shell structure (ZCIS@ZnS QDs) have been synthesized and combined with TiO 2 nanowires or nanoparticles (NWs/NPs) for photodetector applications. In the composite material, the QDs are uniformly attached to the surface of TiO 2 NWs/NPs. The photodetector constructed with ZCIS@ZnS QDs and TiO 2 NWs/NPs (ZCIS@ZnS@TiO 2 NWs/NPs) demonstrated superior photodetection performance. It exhibited excellent responsivity (∼6.2 mA/W) and detectivity (∼1.6 × 10 12 Jones) under ultraviolet (UV) illumination (∼365 nm). This non-toxic and environmentally friendly composite material provides a promising alternative for applications in various fields.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Joule
·
2026
·
IF 37.1
Wenbo Cao,Chao Dong,Dongxing Kou,Chaofan Zheng,Zhiyang Wan,Longhui Lei,Jiajin Kuang,Yang Wang,Faisal Naveed,Liquan Cheng,Mengqi Jin,Zhaoyang Wang,Yingying Dong,Chong Chen,Mingtai Wang
Copper indium sulfide (CuInS 2 ) is a promising absorber among emerging chalcogenide photovoltaics. However, solution-processed CuInS 2 solar cells at low temperature (< 400°C) still lag far behind the requirement of at least 10% efficiency for practical application since 1993. Here, a low-temperature strategy, featuring a solution-processed In-rich CuInS 2 film interdigitated with electron-extracting interfaces and a sulfur anion-induced gradient phase transformation (S 2− -GPT) process at < 200°C, is conceptually developed for preparing the CuInS 2 solar cells with a breakthrough efficiency up to 12.28%. The interdigitated structure has unique advantages over the simple bilayer structure conventionally used; moreover, the S 2− -GPT process leads to the transformation from CuAu to CuIn 5 S 8 phase to reduce the defect density and charge recombination inside CuInS 2 film for boosting solar cell performance. The detailed principles behind material and device are elucidated. Our findings offer a promising way to chalcogenide solar cells and the application of CuInS 2 devices.
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Chao Dong,Rong Liu,Wenbo Cao,Weili Meng,Mingtai Wang
Herein, for the first time, we have fabricated superstrate-type CuInS2 planar heterojunction solar cells configured as FTO/SnOx/CdS/CuInS2/Spiro-OMeTAD/Au, in which an amorphous tin oxide (SnOx) interfacial layer is prepared by a straightforward solution-processing method at low temperatures (≤200 °C), and 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) is used as a hole-transporting material. It is revealed that the solar cells exhibit a performance that is strongly dependent on the SnOx layer thickness and deliver a peak power conversion efficiency of 6.56% for a 25 nm-thick SnOx layer, which is higher by 78% than that of the control devices without the SnOx interfacial layer. This is attributed to the reduced interfacial charge recombination at the CdS/CuInS2 interfaces due to the fast extraction of photogenerated electrons from the CdS layer into the SnOx film for collection. This work offers promising interfacial access to efficient CuInS2 planar heterojunction solar cells.
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DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Li Fu,Zerui Liu,Pengjie Dong,Yingshu Guo
Screening a novel electrochemiluminescence (ECL) system and reducing electrochemical interference by lowering the ECL potential are crucial to ECL evolution. Herein, an ECL system is explored with different hydrazine compounds as coreactants and ternary CuInS2/ZnS nanocrystals (CIS/ZnS NCs) as a luminophore, demonstrating that hydrazine compounds with varied structures would assuredly affect the ECL triggering potential and efficiency. Electro-oxidized hydrazine-based coreactants containing a symmetrical structure and −N–N single bonds with strong reducibility could produce an efficient electron transfer recombination path with electro-oxidized CIS/ZnS NCs, which eventually generate efficient and low-triggering-potential ECL performance; otherwise, the hydrazine compounds with a double bond, such as −C═N or −C═O, or strong electronegative atoms would reduce the ECL efficiency and increase the ECL triggering potential, which result from double bonds or strong electronegative atoms of hydrazine compounds hindering the protonation of coreactants and then delaying the electron–hole recombination process. The structure of hydrazine-based coreactants with a −C═S double bond would competitively bond with the Cu element within CIS/ZnS NCs, contributing to the blank ECL with CIS/ZnS NCs as the luminophore. Furthermore, CIS/ZnS NCs exhibit two additional low hole injected processes under alkaline conditions through exploration of the differential pulse voltammetry (DPV) nature from CIS/ZnS NCs. The ultralow-triggering-potential of CIS/ZnS NCs around 0.11 V could be achieved by adjusting the hole injection processes of NCs and selecting pasoniazide as the coreactant, which is extremely below any previously reported ECL system. This work contributes to a deeper understanding of the ECL mechanism.
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高影响因子
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