CRYSTENGCOMM
·
2017
·Vol. 19
·期 34
·5048-5057
·
IF 3.474
Kaisheng Yao,Chenchen Zhao,Nannan Sun,Weiwei Lu,Yuan Zhang,Huiyong Wang,Jianji Wang
Rational design of ingenious strategies to build hierarchical architectures of nanomaterials is highly desirable and technically important due to their excellent properties and widespread application in varied fields. Here, we report a facile one-pot approach for the solvothermal synthesis of freestanding CuS nanowalls with the assistance of a common ionic liquid, 1-decyl-3-methylimidazolium bromide ([C10mim]Br). In the presence of [C10mim]Br, intriguing CuS nanowalls have been fully constructed from the as-generated CuS thin nanosheets at the liquid–liquid interface of chloroform and water. An outstanding feature is that no hard template is utilized to support and/or assist the growth of CuS nanowalls. The as-prepared CuS nanowalls have been characterized and analyzed systematically and a series of factors affecting the morphology have been investigated. It is found that the alkyl chain length, anionic nature and heterocyclic structure of ionic liquids play an important role in directing the formation of freestanding CuS nanowalls. A possible growth mechanism for the formation of CuS nanowalls is presented based on control experiments. In addition, the as-synthesized CuS nanowalls demonstrate prominent catalytic activity for the thermal decomposition of ammonium perchlorate (AP).
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 52
·34107-34116
·
IF 4.036
Chuanfeng Zang,Hao Chen,Xiangye Han,Wei Zhang,Junfang Wu,Fanghua Liang,Jiamu Dai,Hongchao Liu,Guangyu Zhang,Ke-Qin Zhang,Mingzheng Ge
PVDF/ZnO/CuS photocatalysts with ZnO/CuS heterojunctions were synthesized via electrospinning, hydrothermal, and ion-exchange techniques. As matrix materials, electrospun PVDF nanofibers are easy to be recycled and reused. ZnO nanorods anchored on PVDF nanofiber with high specific surface area provide abundant active reaction sites for photocatalysis. While the loaded CuS nanoparticles as a photosensitizer compensate the low quantum efficiency of ZnO and improve the visible-light photocatalytic efficiency. As a result, the PVDF/ZnO/CuS composited photocatalyst exhibits outstanding photocatalytic performance in exposure to UV and visible light owing to the suppressed recombination of electron–hole pairs and widened visible light absorption range. The kinetic constants of PVDF/ZnO/CuS nanocomposites under UV irradiation (9.01 × 10−3 min−1) and visible light (6.53 × 10−3 min−1) irradiation were 3.66 and 2.53 times higher than that of PVDF/ZnO (2.46 × 10−3 min−1 & 2.58 × 10−3 min−1), respectively. Furthermore, PVDF/ZnO/CuS nanocomposites demonstrate excellent robustness in terms of recycling and reuse, which is advantageous in practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 10
·期 6
·2781-2789
·
IF 7.367
Chao Hu,Wenhui Chen,Yi Xie,Santosh Kumar Verma,Priscila Destro,Gang Zhan,Xingzhu Chen,Xiujian Zhao,P. James Schuck,Ilka Kriegel,Liberato Manna
We demonstrate the fabrication of various types of heterostructures, including core–shells and dimers. This is achieved by reacting platelet-shaped covellite (CuS) nanocrystals (NCs) with Au3+ ions under various reaction conditions: the exposure of CuS NCs to Au3+ ions, in the presence or in the absence of ascorbic acid (AA), leads to the formation of CuS@Au core–shell nanostructures; the reaction of CuS NCs with Au3+ ions in the presence of oleylamine (OM) leads to the formation of CuS@Au2S; the presence of both OM and AA leads to the formation of Au/CuS dimers. Depending on which condition is chosen, either cation exchange (CE) between gold and copper ions is predominant (leading to amorphous Au2S) or the reduction of Au3+ leads to the nucleation of metallic Au domains (which are operated by the AA). In the heterostructures achieved by CE, the Au2S shell is almost entirely amorphous, and can be converted to polycrystalline upon electron beam irradiation. Finally, when both oleylamine and AA are present in the reaction environment, Au/CuS dimers are formed due to the reduction of Au3+ to metallic Au domains which nucleate on top of the CuS seeds. The experimental dual plasmonic bands of the CuS@Au core–shells and Au/CuS dimers are in agreement with the theoretical optical simulations. The procedures described here enable the synthesis of core–shell nanostructures with tunable localized surface plasmon resonances (LSPRs) in the near-infrared (NIR) region, and of plasmonic metal/semiconductor heterostructures with LSPRs in both the NIR and the visible regions.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yunhui Wang,Yiyong Zhang,He Li,Yueying Peng,Jiyang Li,Jing Wang,Bing-Joe Hwang,Jinbao Zhao
CuS nanospheres interconnected by the carbon nanotubes (CNTs) have been successfully prepared via a facile one-step microwave-assisted method. The component and microstructure of CuS/CNTs hybrid materials are well characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). Assembled as electrodes and tested in lithium ion batteries, the composites show impressive electrochemical performances. After 450 cycles, the CuS/0.1 CNT and CuS/0.5 CNT release more than 437 and 569 mAh g −1 , respectively, at 400 mA g −1 , which are superior to those of contrast experiments (pristine CuS and CuS mechanically mixing with CNTs). Even at the high current density of 6400 mA g −1 , the CuS/0.5 CNT still displays the reversible capacity of about 400 mAh g −1 . The improved performances can be ascribed to the inherently CNTs conducting network, boosting the interior electron transport and reaction kinetics, so that a significantly enhanced reversible capacities and rate capability can be realized. Furthermore, the surface properties and reaction kinetics of electrodes are also investigated via cyclic voltammetry (CV) and galvanostatic intermittence titration (GITT) measurements, proving the enhanced lithium storage properties.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 22
·10343-10351
·
IF 4.197
Xijian Liu,Qilong Ren,Fanfan Fu,Rujia Zou,Qian Wang,Guobing Xin,Zhiyin Xiao,Xiaojuan Huang,Qian Liu,Junqing Hu
We report a facile and low-cost approach to design a difunctional nanoplatform (CuS@mSiO2-PEG) as a near-infrared (NIR) light responsive drug delivery system for efficient chemo-photothermal therapy. The nanoplatform demonstrated good biocompatibility and colloidal stability, as well as high loading capacity for the anticancer drug (26.5 wt% for doxorubicin (DOX)). The CuS nanocrystals (core) within these CuS@mSiO2-PEG core–shell nanoparticles can effectively absorb and convert NIR light to fatal heat under NIR light irradiation for photothermal therapy, and the release of DOX from the mesoporous silica (shell) can be triggered by pH and NIR light for chemotherapy. When the CuS@mSiO2-PEG/DOX nanocomposites were irradiated by 980 nm light, both chemotherapy and photothermal therapy were simultaneously driven, resulting in a synergistic effect for killing cancer cells. Importantly, compared with chemotherapy or photothermal treatment alone, the combined therapy significantly improved the therapeutic efficacy.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Xia Jiang,Liangli Li,Wenhua Zhang,Junming Xu
Selective electrochemical hydrogenation of furfural (FFL) with high efficiency to produce important platform chemical (furfuryl alcohol) has great economic value and research significance. In this work, a novel and sustainable Pd/CuS@C catalyst derived from waste cooking oil (WCO) was prepared to catalyze the selective electrocatalyst hydrogenation (ECH) of FFL to furfuryl alcohol (FFA) for the first time. As expected, Pd/CuS@C catalyst was only active in C=O ECH to produce FFA in a >99 % selectivity, along with a >99 % conversion of FFL. Selective and stable ECH over time ensured up to six cycles. Density functional theory (DFT) calculations indicated that synergistic interaction between CuS and Pd(111) exhibited the high adsorption energies of H 2 and FFL. Overall, this research innovatively combined WCO treatment and FFL electrocatalytic upgrading, providing a green and environmentally friendly solution for sustainable energy conversion and electrochemical valorization of biomass derivatives.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Liangqin Zhou,Fan Chen,Zishuo Hou,Yuanwei Chen,Xianglin Luo
It is of significant importance to develop an injectable self-healing hydrogel system that can simultaneously deal with antibacterial treatment, tumor therapy and wound healing acceleration for biomedical fields. Herein, a system of CuS nanoparticle complex (CuS NC) hydrogels with multiple functions is firstly developed through incorporating polyethylene glycol (PEG)-functionalized CuS nanoparticles (CuS NPs) with surface amino groups into a 3D network of oxidized dextran (ODex) and PEG with amino end groups. The in situ formed CuS NC hydrogels display not only excellent self-healing and injectable abilities, but also good biocompatibility for biomedical application. The introduction of CuS NPs endows the hydrogels with outstanding photothermal/photodynamic performance under near-infrared laser irradiation, creating the capability to fully kill S.aureus and E.coli bacteria, and to inhibit tumor growth in a subcutaneous skin-tumor model. The CuS NC hydrogels maintain sustained release of Cu 2+ and moist microenvironment, and thus effectively accelerate wound healing in vivo . This work illustrates a facile strategy to prepare injectable, multifunctional nanoparticle hybrid hydrogels which can be used severally or simultaneously for bacterial infection treating, skin wound healing and skin-tumor therapy.
研究领域:
生物医学工程
·
材料科学
·
药理学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 19
·3727-3734
·
IF 5.958
Zizun Tian,Zhonglu Qi,Yuhao Yang,Hailong Yan,Qianqiao Chen,Qin Zhong
A Ti3C2/CuS composite has been fabricated as a counter electrode for quantum dot-sensitized solar cells by anchoring CuS nanoparticles on Ti3C2via a facile ion-exchange method at room temperature. The accordion-like Ti3C2 is well intercalated and coated with CuS nanoparticles at the optimized ratio of Ti3C2 to CuS. Both electrochemical impedance spectroscopy and Tafel polarization measurements indicate that the composite exhibits a significantly faster electrocatalytic rate towards the polysulfide reduction than pure CuS. The quantum dot-sensitized solar cell-based composite counter electrode displays an overall power conversion efficiency of 5.11% which is 1.5 times that obtained from the CuS counter electrode. The higher power conversion efficiency benefits from the improved short-circuit current density (20.86 mA cm−2), open-circuit voltage (0.56 V) and fill factor (0.45). The enhancement of photovoltaic performance is mainly attributed to the combined advantages of the excellent conductivity of the Ti3C2 skeleton and the abundant catalytically active sites of CuS nanoparticles.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 5
·2106854
·
IF 18.808
Ying Liu,Jing Liu,Qinghua Zhang,Qinshu Zhu,Xinhe Liu,Zhaoyin Wang,Zhihui Dai
Promotion of the photoelectric (PE) response is of great importance for improving performances of solar cells, photocatalysis and photoelectrochemical (PEC) sensing. Herein, advanced CuO/Ag 2 S/CuS nanohybrids (NHs) are developed in which the CuO/Ag 2 S NHs have superior PE properties while the CuS nanoparticles own notable photothermal (PT) feature. Under illumination of 850 nm light, the CuO/Ag 2 S NHs are in-situ heated by the PT effect of CuS, which significantly facilitates carrier generation and migration, thus eventually increasing related PE response by 1.4 times with a PT contribution percentage of 34.3% to the total photocurrent. Based on this PT-promoted PE mechanism together with an enzymatic catalysis-induced Cu species regulation, a bio-friendly PEC sensing platform is established, realizing the sensitive determination of inorganic pyrophosphatase with a broad detection range from 0.05 to 35 mU ml −1 and a low detection limit of 0.02 mU ml −1 . In particular, further variable temperature tests show that this PT effect is even capable of shrinking the band gap of CuS (from ≈2.1 to ≈1.3 eV), expanding the wavelength range of adoptable excitation light, thereby being beneficial for biological applications. In comparison with other methods, promotion of PE response with PT effect has few restrictions on photoactive materials, and is therefore valuable to various PE-relevant applications.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuejia Yin,Yajie Chen,Xinyan Yu,Qiuyu Zhang,Yaxin Ru,Guohui Tian
During the photocatalytic CO 2 reduction process, fast charge transport, abundant active sites, and high visible light utilization in photocatalysts are key to achieving excellent CO 2 conversion efficiency. In this work, we have designed and prepared hierarchical CuS@SnS 2 p-n heterostructure hollow cubes for photocatalytic CO 2 reduction. First, a monolayer of CuS was in situ generated on the pre-prepared Cu 2 O cubes to construct core–shell Cu 2 O@CuS cubes by sulfidation of Cu 2 O cubes. The following etching process led to the formation of CuS hollow cubes. Finally, the hierarchical CuS@SnS 2 p-n heterostructure hollow cubes were obtained by growing SnS 2 nanosheets on the CuS hollow cubes. The prepared CuS@SnS 2 p-n heterostructure hollow cubes showed an improved photocatalytic CO 2 reduction activity compared with the bare CuS and SnS 2 control samples. The p-n heterojunction formed between SnS 2 and CuS as well as its hollow structure enhanced the charge carrier separation efficiency and the light absorption capacity of the hybrid catalyst. Furthermore, after the decoration of Au nanoparticles, the formed Schottky junction further discouraged the charge carrier recombination. Thus, the cooperative p-n heterojunction and Schottky junction greatly facilitated photocatalytic CO 2 reduction, and exhibiting the maximum CO and CH 4 yields of 140.1 and 77.5 μmol g −1 h −1 , respectively. This work presents an efficient design of high-performance catalysts for photocatalytic CO 2 reduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 46
·29088-29095
·
IF 3.108
Peijian Yao,Shuyao Xie,Meidan Ye,Rui Yu,Qian Liu,Dandan Yan,Weiwei Cai,Wenxi Guo,Xiang Yang Liu
A well-designed flexible ITO-free electrochromic supercapacitor was obtained using a hybrid graphene/CuS network on PET (G–CuS) as the transparent conductive electrode (TCE). This new type of TCE was produced by photolithography, chemical vapor deposition and a low temperature solvothermal reaction. The TCE achieves a sheet resistance (Rs) as low as ∼20 Ω sq−1 with a high transmittance of over 85%. In particular, the G–CuS TCE displays a remarkable flexible stability under bending stresses and an excellent chemical stability through the polyaniline (PANI) electrodeposition in acid solution. The PANI/G–CuS electrode gave a favorable area capacitance of 17.3 mF cm−2 at 0.025 mA cm−2 along with a large optical modulation of 40.1% (620 nm). More intuitively, a symmetrical supercapacitor of PANI/G–CuS was fabricated with H2SO4–PVA hydrogel as the electrolyte, and its noticeable color variation enables users to evaluate the level of stored energy by the naked eye in a predictable manner. This work may provide a practical route to the fabrication of stable TCEs in smart supercapacitors.
研究领域:
材料科学
·
能源存储与转换
·
纳米技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 10
·4507-4520
·
IF 2.7
Luhua Wang,Yi Ren,Hongfang Zhao,Hongxia Li,Xiaohui Niu,Deyi Zhang,Haiyan Fan,Kunjie Wang
To address the water pollution problem caused by hexavalent chromium, this study took advantage of a multi-defect adsorption mechanism and constructed a multiple defect-containing type-II heterojunction material, CuS/Cv-CNNs. This material has simultaneous sulfur vacancies, copper vacancies, and carbon vacancies, which were used to accelerate the removal of chromium from wastewater. Attributed to the formation of electron-rich structures and free-moving ions by the construction of multiple defect sites, the photogenerated carriers generated by CuS/Cv-CNNs-70 were efficiently separated, and a high amount of physical Cr(VI) adsorption was achieved by electrostatic attraction and ion exchange, consistent with a Freundlich isothermal adsorption model. Studies on the adsorption thermodynamics demonstrate that CuS/Cv-CNNs-70 prefers to adsorb Cr(VI) when temperatures are raised. In addition, the removal of Cr(VI) (120 mg L−1) by CuS/Cv-CNNs-70 reached 97.10% after 60 minutes through the synergistic effect of adsorption and visible-light photocatalysis. This finding indicates that the synergistic effect between the multilocation defects stimulated the combined potential of adsorption and photocatalysis of CuS/Cv-CNNs-70 to realize the full utilization of the defects. In conclusion, this study confirms the prominent role of a multiple defect mechanism in wastewater treatment and environmental protection.
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）