DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 16
·5652-5659
·
IF 4.099
Yong-Jun Yuan,Gaoliang Fang,Daqin Chen,Yanwei Huang,Ling-Xia Yang,Da-Peng Cao,Jingjing Wang,Zhen-Tao Yu,Zhi-Gang Zou
Expanding the photoresponse range of TiO2-based photocatalysts is of great interest for photocatalytic H2 production. Herein, noble-metal-free CuInS2 quantum dots were employed as a novel inorganic dye to expand the visible light absorption of TiO2/MoS2 for solar H2 generation. The as-prepared CuInS2/TiO2/MoS2 photocatalysts exhibit broad absorption from the ultraviolet to near-infrared region. Under visible light irradiation (λ > 420 nm), the CuInS2/TiO2/MoS2 photocatalyst with 0.6 mmol g−1 CuInS2 and 0.5 wt% MoS2 showed the highest H2 evolution rate with a value of 1034 μmol h−1 g−1. Moreover, a considerable H2 evolution rate of 141 μmol h−1 g−1 was obtained under the irradiation of the optimized CuInS2/TiO2/MoS2 photocatalyst with >500 nm light. The reaction mechanism of the CuInS2/TiO2/MoS2 photocatalyst for photocatalytic H2 evolution was investigated in detail by photoluminescence decay study, and the results showed that the photoexcited electrons of CuInS2 can be transferred efficiently through TiO2 to MoS2 and then react with the absorbed protons to generate H2. The reported sensitization strategy tremendously improves the visible light absorption capacity and the photocatalytic performance of TiO2-based photocatalysts.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体物理
·
太阳能转化
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Long Kong,Zhichun Li,Shouqiang Huang,Jinping Jia,Liang Li
Semiconductor quantum dots (QDs) are interesting photocatalysts for solar fuel production and environmental pollution control. However, the poor stability and recombination probability of photogenerated electron-hole pairs prevented the practical applications of QDs based photocatalysts. Herein we demonstrated that the incorporation of amorphous titania (TiO 2 ) coatings with CuInS 2 /ZnS-TiO 2 heterostructures (CIS/ZnS-TiO 2 gel) can markedly boost photocatalytic performance and stability for Cr (VI) reduction. The promoted photocatalytic activity of CIS/ZnS-TiO 2 gel is associated with the enhanced light-absorption and distinctive heterojunction imposed by the integration of CIS/ZnS-TiO 2 with amorphous TiO 2 coatings, which drastically speed the separation of photogenerated electron-hole pairs. Moreover, the physical protection and photocorrosion-inhibition functions (receptors of photogenerated holes from CIS/ZnS QDs) arised from the amorphous TiO 2 coatings were mainly responsible for the promoted photostability of CIS/ZnS-TiO 2 gel. Our CIS/ZnS-TiO 2 gel retained over 90% of its initial activity under cycle tests, while the bared CIS/ZnS-TiO 2 showed a distinct reduction (approximately 35%) of its original efficiency due to the photocorrosion and weight-loss. Obviously, the incorporation of amorphous TiO 2 along with its bulk appearance of gel realized the enhanced photocatalytic performance with a favorable cycling stability. This strategy could be extended to other QDs-based photocatalysts in improving photocatalytic performance toward practical application.
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
Nanomaterials
·
2023
·Vol. 13
·期 6
·1085
·
IF 5.3
Qingchao Zhou,Zhongyi Shang
The commercial application of colloidal semiconductor nanocrystals has been realized owing to the development of composite film technology. Here, we demonstrated the fabrication of green and red emissive CuInS2nanocrystals embedded polymer composite films of equal thickness by using a precise solution casting method. The impacts of polymer molecular weight on the dispersibility of CuInS2nanocrystals were then systematically studied through evaluating the decrease in transmittance and red shift of emission wavelength. The composite films made from PMMA of small molecular weights exhibited higher transmittance. Applications of these green and red emissive composite films as color converters in remote-type light-emitting devices were further demonstrated.Keywords:CuInS2nanocrystals;PMMA;composite films;molecule weights;white LEDs
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Oncology Letters
·
2017
·Vol. 15
·期 2
·2471-2476
·
IF 1.39
Guang Sun,Wanying Xing,Ren Xing,Liu Cong,Sun Tong,Siyao Yu
The aim of the present study was to develop a water-soluble biomarker for the detection of breast cancer using quantum dots (QDs) conjugated to Ki‑67, a nuclear protein associated with the cell cycle. Ki‑67 is also a marker of cell proliferation, with expression levels categorizing good and poor prognosis in invasive breast cancer. Ki‑67 is a clinically used biomarker for breast cancer diagnosis, treatment and prognosis. Owing to the optical and chemical advantages of QDs, QD‑based nanotechnology may aid the construction of a biomedical imaging platform for the study of cancer cell behavior. In the present study, a biomarker was prepared by employing the water‑soluble CuInS2/ZnS QDs conjugated to an anti‑Ki‑67 monoclonal antibody to detect Ki‑67 expression in breast cancer. The QDs, which were hydrophobic and coated with octadecylamine, were encapsulated with an amphiphilic biocompatible centipede‑like polymer, and then conjugated to anti‑Ki‑67 monoclonal antibodies (QD‑Ki‑67 probes). The QD‑Ki‑67 probes retained the original optical properties of the unadorned QDs and did not exhibit distinct toxic side effects in in vitro cytotoxicity experiments. Therefore, this CuInS2/ZnS QD‑labeled bioprobe, with a high quantum yield and low cytotoxicity, is a promising candidate for bioimaging and may be used as a cell label.
研究领域:
肿瘤学
·
纳米技术
·
生物医学工程
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2021
·
IF 3.721
Qing Zhou,Wenbo Ma,Zhenlong Zhang,Yuefeng Liu,Huafang Zhang,Yanli Mao
In this paper, double-layered hole transport material (HTM) was designed and fabricated by adding a thin CuInS 2 film between perovskite and Spiro-OMeTAD (Spiro) layers. The power conversion efficiency (PCE) of the perovskite solar cells (PSCs) with double-layered HTM of CuInS 2 /Spiro was improved to 19.63% from 17.97% for the devices with pure Spiro. Moreover, the operational stability of the PSCs with double-layered HTM of CuInS 2 /Spiro was enhanced. The PCE of the PSCs with CuInS 2 /Spiro retains 91% of the initial value after 30 days storage in ambient atmosphere. The experimental results indicate that the improved performance could be come from the energy band match between CuInS 2 and Spiro, fast hole extraction and transport, and decreased charge recombination in the PSCs with double-layered HTM of CuInS 2 /Spiro. This work provides a promising prospect to design a low-cost and high stability HTM for commercial PSCs.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 20
·5277-5285
·
IF 3.286
Chen Li,Lin Jianwei,Yi Jinquan,Weng Qinghua,Zhou Ying,Han Zhizhong,Li Chunyan,Chen Jinghua,Zhang Qian
Rapid, highly sensitive detection of tau protein and other neurodegenerative biomarkers remains a significant hurdle for diagnostic tests for Alzheimer's disease. In this work, we developed a novel tyrosinase (TYR)-induced tau aptamer–tau–tau antibody (anti-tau) sandwich fluorescence immunoassay to detect tau protein that used dopamine (DA)-functionalized CuInS 2 /ZnS quantum dots as the fluorophore. CuInS 2 /ZnS core/shell quantum dots with high luminescence, low toxicity, and excellent biocompatibility were successfully fabricated and decorated with DA through amide conjugation. Meanwhile, TYR was conjugated with anti-tau by a click reaction. When DA-functionalized CuInS 2 /ZnS quantum dots were added to the sandwich system, TYR catalyzed the transformation of DA to dopamine quinone, which acted as an effective electron acceptor and triggered fluorescence quenching. The fluorescence intensity of the immunoassay based on DA-functionalized CuInS 2 /ZnS quantum dots shows good performance in terms of linearity with the logarithm of tau protein concentration, with a linear concentration range from 10 pM to 200 nM. This work is the first to use a TYR-induced fluorescence immunoassay for the rapid detection of tau protein, paving a new way for the detection of disease biomarkers.
Graphical abstract
研究领域:
生物化学
·
纳米技术
·
神经科学
·
诊断学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Chuanyun Yang,Jiping Shi,Zhishuai Wang,Haiquan Xie,Lu Ruan
One potential sustainable energy conversion technique is the photocatalytic reduction of CO 2 by semiconductors. However, insufficient active sites and low utilization efficiency of solar energy lead to the unsatisfactory effect of photothermal catalytic reduction of CO 2 . Thus, in this study, leaf-like CuInS 2 micro-nano structures are prepared on three-dimensional flexible substrate by one-step hydrothermal method to improve the photothermal CO 2 reduction efficiency. Among them, the preparation process of hydrothermal method is simple, energy-saving and efficient. In addition, micro-nano structures can not only provide more active sites for photocatalysts due to their large specific surface area, but also form more pores that can promote electron transfer efficiency. Meanwhile, the introduction of sulfur vacancy can promote the separation of photogenerated carriers and improve the adsorption capacity of CO 2 . As a result, the yields of CO 2 reduction to CO and CH 4 by leaf-like CuInS 2 micro-nano structures were 1285.2 μmol/m 2 /h and 231.4 μmol/m 2 /h, respectively, under the synergistic action of photothermal. At present, there are few reports about the preparation of CuInS 2 micro-nano structures in flexible stainless steel mesh, which also provides a new idea for the design of efficient photothermal cocatalysts.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Chunjuan Xie,Xiaoying Lu,Fang Deng,Xubiao Luo,Jiong Gao,Dionysios D. Dionysiou
Nano-sized CuInS 2 was evenly anchored on the thin film of reduced graphene oxide (rGO/CuInS 2 ) by a simple one-step solvothermal method. The photocatalytic activity of rGO/CuInS 2 was much higher than that of pure CuInS 2 , and was highly dependant on rGO amount with results revealing an optimal rGO content of 1 wt%. The 1% rGO/CuInS 2 composite demonstrated the highest visible-light photocatalytic activity with almost 90% 2-nitrophenol removal, which was almost two times of pure CuInS 2 . The enhanced photocatalytic activity of rGO/CuInS 2 is ascribed to that the ultrathin film structure of rGO endows rGO/CuInS 2 composites with a large density of exposed active sites to reactants, short transport distances of photogenerated charges and the efficient separation of charge carriers. Of special significance is that 1% rGO/CuInS 2 composite can effectively treat real pharmaceutical wastewater with 86.5% chemical oxygen demand (COD) removal efficiency in 11 h. Moreover, there was no obvious decrease in the photocatalytic activity of rGO/CuInS 2 composites after four photocatalytic cycles. The high COD removal efficiency of pharmaceutical wastewater and reusability indicate the great potential of rGO/CuInS 2 in environmental purification of organic pollutants.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 7
·4533-4536
·
IF 1.134
Deng Chong,Fu Bowen,Li Lili,Wang Yanlai,Yang Lin
The hot-injection method was used for the synthesis of ternary metal chalcogenide nanocrystals (NCs) CuInS2 (CIS); this was achieved by using the metal precursors (copper iodide and indium acetate) and four different types of sulfur precursor solutions. It was discovered
that CIS NCs synthesized with different sulfur precursor solutions exhibited the chalcopyrite structure with similar particle sizes of ~4.2 nm. As a comparison, CIS NCs synthesized using ODE-S precursor displayed an enhanced luminescence intensity and a long PL decay lifetime, which could
be considered as an evidence of improved interior crystallinity.
研究领域:
材料科学
·
纳米技术
·
化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 47
·期 1
·67-73
·
IF 4.029
Yongjie Li,Aiwei Tang,Zhenyang Liu,Lan Peng,Yi Yuan,Xifeng Shi,Chunhe Yang,Feng Teng
A simple two-phase strategy was developed to prepare Cu31S16–CuInS2 heterostructures (HNS) at the oil/aqueous interface, in which the In(OH)3 phase was often obtained in the products due to the reaction between indium ions and hydroxyl ions in the aqueous phase. To prevent the formation of the In(OH)3 phase, citric acid was incorporated into the aqueous phase to assist in the synthesis of uniform carrot-like Cu31S16–CuInS2 semiconductor HNS at the oil/aqueous interface for the first time. By manipulating the dosage of citric acid and Cu/In precursor ratios, the morphology of the Cu31S16–CuInS2 HNS could be tailored from mushroom to carrot-like, and the presence of citric acid played a critical role in the synthesis of high-quality Cu31S16–CuInS2 HNS, which inhibited the formation of the In(OH)3 phase due to the formation of the indium(III)–citric acid complex. The formation mechanism was studied by monitoring the morphology and phase evolution of the Cu31S16–CuInS2 HNS with reaction time, which revealed that the Cu31S16 seeds were first formed and then the cation-exchange reaction directed the subsequent anisotropic growth of the Cu31S16–CuInS2 HNS.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Li Fu,Bin Zhang,Xiaoyan Long,Kena Fu,Xuwen Gao,Guizheng Zou
Screening a novel electrochemiluminescence (ECL) system is crucial to ECL evolution. Herein, an efficient ECL system with less interference and environmental concern under physiological condition is developed via a unique internal Cu(I)/Cu(II) couple cycling amplified strategy by employing the glutathione- and citrate-capped copper indium sulfide (CIS)/ZnS nanocrystals (NCs) as electrochemiluminophore and N2H4·H2O as co-reactant. CIS/ZnS NCs can be electrochemically injected with valence band (VB) hole at 0.46 and 0.87 V (vs Ag/AgCl), and then achieve the same hole-injected states by relocalizing VB holes with the Cu(I) species inside of CIS/ZnS NCs to form internal Cu(II) defects, while each N2H4·H2O molecule can be successively oxidized to two more reducing species N2H3• and N2H2 around 0.10 V, and inject conduction band (CB) electron onto CIS/ZnS NCs for triple times. The internal Cu(I)/Cu(II) couple cycling involved radiative-charge recombination between these VB hole and CB electron eventually enables two efficient near-infrared ECL processes (around 731 nm) at 0.55 and 0.87 V, in which each single nanocrystal may participate in multiple ECL reaction cycles to produce multiple photons for amplified ECL, similar to the tris(bipyridyl)ruthenium(III) based ECL system. The low-triggering-potential ECL process at 0.55 V can be utilized to selectively determine Cu(II) with a wide linear range from 10 and 1500 nM and a limit of detection of 5 nM (S/N = 3). This work presents a NCs engineering and co-reactant selecting combined strategy for further ECL evolution.
研究领域:
分析化学
·
纳米技术
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiaoying Lu,Wenjie Che,Xiufeng Hu,Yi Wang,Aiting Zhang,Fang Deng,Shenglian Luo,Dionysios D. Dionysiou
The pollution of pharmaceutical wastewater has attracted global attention. Photocatalysis is an attractive yet challenging method for the degradation of pharmaceutical residues. Fabricating efficient Z-scheme heterojunctions with intimate interface contact for enhancing the performance of photocatalysts is a challenge. Herein, novel visible-light-driven direct Z-scheme CuInS 2 /Bi 2 WO 6 heterojunctions with intimate interface contact were successfully synthesized by in situ hydrothermal growth of Bi 2 WO 6 directly on the surface of CuInS 2 network-like microspheres, and the content of CuInS 2 was optimized. The photocatalytic activity of optimal Z-scheme 15% CuInS 2 /Bi 2 WO 6 for the degradation of tetracycline hydrochloride (TC•HCl) is more than three times that of bare CuInS 2 and 17% higher than that of Bi 2 WO 6 , which is attributed that the intimate interface contact can assure excellent interfacial charge transfer abilities. Moreover, Z-scheme CuInS 2 /Bi 2 WO 6 heterojunctions are highly stable with no inactivation in photocatalytic cycles. More importantly, real pharmaceutical industry wastewater can be efficiently disposed by Fenton-aided photocatalysis of Z-scheme CuInS 2 /Bi 2 WO 6 heterojunctions with COD removal efficiency being 90.5%, which is much higher than the reported results, and thus sets a new performance benchmark for practical application in real pharmaceutical wastewater treatment.
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
危险品化学品经营许可证（带存储）