ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jing Chen,Mingzheng Gu,Shoujie Liu,Tian Sheng,Xiaojun Zhang
Modifying the electronic structure of electrocatalysts by metal doping is favorable to their electrocatalytic activity. Herein, by a facile one-pot redox process of Fe(III) and Cu(I), Fe(II) was successfully doped into the subsurface of CuS nanosheets (NSs) for the first time to obtain a novel electrocatalyst (Fesub-CuS NSs) that possesses not only subtle lattice defects but also an atomic-level coupled nanointerface, greatly enhancing the oxygen evolution reaction (OER) performances. Meanwhile, Fe(II) and Fe(III) coexisting in Fesub-CuS nanosheets are favorable to OER through valence regulation. As expected, by simultaneously controlling the abovementioned three factors to optimize Fesub-CuS nanosheets, they display a lower overpotential of 252 mV at a current density of 20 mA cm–2 for OER, better than 389 mV for pristine CuS nanosheets. This discovery furnishes low-cost and efficient Cu-based electrocatalysts by metal doping. Density functional theory (DFT) calculations further verify that Fesub-CuS(100) is thermodynamically stable and is more active for OER. This research provides a strategy for the atomic-scale engineering of nanocatalysts and also sheds light on the design of novel and efficient electrocatalysts.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shudi Mo,Yunhua Song,Meihong Lin,Jianling Wang,Ze Zhang,Jingyu Sun,Donggang Guo,Lu Liu
Defect engineering has been proven to be an effective approach for electronic structure modulation and plays an important role in the photocatalytic performance of nanomaterials. In this study, a series of CuS nanosheet sulfur vacancies ( V S ) are constructed by a simple hydrothermal synthesis method. The CuS with the highest V S concentration exhibits strong antibacterial performance, achieving bactericidal rates of 99.9% against the Gram-positive Bacillus subtilis and Gram-negative Escherichia coli bacteria under 808 nm laser irradiation. Under illumination, the temperature of the catalyst increases from 23.5 °C to 53.3 °C, and with a high photothermal conversion efficiency of 41.8%. For E. coli and B. subtilis , the reactive oxygen species (ROS) production that is induced by the CuS group is 8.6 and 9.6 times greater, respectively, than that of the control group. The presence of V S facilitates the enhancement of the light absorption capacity and the separation efficiency of electron-hole pairs, thereby resulting in improved photocatalytic performance. The synergistic effect of photothermal therapy (PTT) and photodynamic therapy (PDT) is aimed at causing oxidative damage and leading to bacterial death. Our findings provide an effective antibacterial strategy and offer new horizons for the application of CuS catalysts with V S in the NIR region.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Mancong Li,Yongteng Qian,Jimin Du,Haoran Wu,Linyu Zhang,Gang Li,Kaidi Li,Weimin Wang,Dae Joon Kang
The design and fabrication of eco-friendly, highly efficient, and non-noble-metal-based catalysts are demanding challenges in energy-conversion technologies. Herein, we successfully synthesized CuS nanosheets decorated with CoS2 nanoparticles through a facile route. The optimized 3% CoS2-7% CuS catalysts exhibited remarkable electrocatalytic performance, with excellent cyclic stability at all pH values for the hydrogen evolution reaction (HER). They exhibited lower Tafel slopes (46, 52, and 59 mV dec–1) and smaller overpotentials (62, 85, and 106 mV) at 10 mA cm–2 in 0.5 M H2SO4, 1 M KOH, and 0.5 phosphate buffer aqueous solutions, respectively, than other CoS2/CuS, pure CoS2, and pure CuS catalysts. We attribute their high electrocatalytic performance to their unique heterostructure and the synergistic effects between the constituent metal sulfides that provides a large interfacial contact area, numerous charge-transfer pathways, as well as abundant surface reaction active sites, enhancing the charge-carrier transfer during the HER activity.
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
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Hao Yuan,Ting Li,Yang Wang,Piming Ma,Mingliang Du,Tianxi Liu,Yangyang Yan,Huiyu Bai,Mingqing Chen,Weifu Dong
Polymeric optical composites have played an important role in selectively shielding solar light to satisfy the increasing requirements of photoprotection and environmental comfort as well as improving the energy saving efficiency of buildings and cars. In the present work, a smart polymer film with high near-infrared (NIR) and ultraviolet (UV) light shielding, acceptable visible light transmittance was developed on basis of CuS nanoplate. The influences of the CuS nanoplate size and the thickness of polymer composite films on the optical and shielding properties were studied. In particular, the composite film can shield 86.5% of the near-infrared light from 800 to 1800 nm and at the same time permitting acceptable visible light (63.4%) with the film thickness of 30 μm. In order to improved UV-shielding performance, CuS nanoplate coated by polydopamine (PDA) was used for preparation of polymer composite film. It was found that UV-shielding performance was further promoted in the entire UV region and exhibited a synergistic relationship between PDA and CuS, which certificating the outstanding contribution of PDA layer on the surface of CuS nanoplate. In a word, the comprehensive research on nanocomposite fabrication, surface modification, and integration techniques enable us to fabricate highly flexible, transparent and reliable composite films with outstanding UV and NIR shielding performance. This novel film is potential to be used as smart windows of buildings and cars for the application of cooling energy saving and UV protection.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 40
·2303099
·
IF 13.3
Zi Yang,Deguang Ji,Zhi Li,Zidong He,Yang Hu,Jie Yin,Yichao Hou,Pinxian Xi,Chun-Hua Yan
Copper-based electrocatalysts effectively produce multicarbon (C 2+ ) compounds during the electrochemical CO 2 reduction (CO 2 RR). However, big challenges still remain because of the chemically unstable active sites. Here, cerium is used as a self-sacrificing agent to stabilize the Cu + of CuS, due to the facile Ce 3+ /Ce 4+ redox. CeO 2 -modified CuS nanoplates achieve high ethanol selectivity, with FE up to 54% and FE C2+ ≈ 75% in a flow cell. Moreover, in situ Raman spectroscopy and in situ Fourier-transform infrared spectroscopy indicate that the stable Cu + species promote C C coupling step under CO 2 RR. Density functional theory calculations further reveal that the stronger * CO adsorption and lower C C coupling energy, which is conducive to the selective generation of ethanol products. This work provides a facile strategy to convert CO 2 into ethanol by retaining Cu + species.
研究领域:
材料科学
·
催化化学
·
能源转化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2025
·
IF 17.1
Qiaoyun Chen,Hatameh Asgarimoghaddam,Wenxi Ji,Wenting Wu,Ji Cao,Rui Wang,Wei Yu,Xiaoting Nie,Yi Zhou,Bo Song,Kevin P. Musselman
Although poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA) is a widely used hole transport layer (HTL) in perovskite solar cells, its poor conductivity and the mismatched energy levels between PTAA and formamidinium-based perovskites increase interfacial carrier recombination and charge-transport resistance. To solve these problems, inorganic CuS nanosheets were synthesized and applied as additives in PTAA for the first time. After the addition of CuS, the conductivity of the HTL improves, and the energy levels are better aligned. In addition, perovskite growth is controlled through the interaction between CuS and PbI 2 , thus improving the quality of the perovskite films, which reduces nonradiative recombination. The addition of CuS into PTAA improved the power conversion efficiency from 21.99 % to 22.92 %. Moreover, both the thermal and humidity stability improved.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Chenhuinan Wei,Xiao Zou,Qiming Liu,Shuxian Li,Chenxia Kang,Wei Xiang
CuS nanosheets modified Cu 2 O/CuO nanowire arrays (NWAs) were successfully fabricated on Cu foil by in-situ growth and successive ionic layer adsorption and reaction (SILAR) methods without binders. The three-dimensional Cu 2 O/CuO NWAs not only showed strong binding force with current collector but also provided abundant surface area to support CuS nanosheets. Different morphologies of CuS were obtained by varying the Cu(NO 3 ) 2 and Na 2 S concentrations and the SILAR cycle. When these step-wise prepared products were employed for non-enzymatic glucose sensing, the amperometric response of the optimized CuS/Cu 2 O/CuO/Cu electrode was approximately twice of that of Cu 2 O/CuO/Cu electrode. The result is attributed to the modification of CuS nanosheets with suitable amount which increases the active surface area of the electrode. This designed electrode presents an ultrahigh sensitivity of 4262 μA mM −1 cm −2 in the range from 0.002 to 4.096 mM, as well as the excellent selectivity, reproducibility and stability. Moreover, due to the facile preparation and the low cost of Cu based sensors, the CuS/Cu 2 O/CuO/Cu electrode will be one kind of promising materials for constructing practical non-enzymatic glucose sensors.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Wenwen Wang,Shihui Jiao,Boran Wang,Yumei Tan,Yue Zhao,Qi Zhang,Yutang Kang,Xinyan Lv,Canyu Cui,Guangsheng Pang
MoS 2 /CuS nanosheets coated on brass mesh with switchable superwettability have been prepared through a facile hydrothermal method. The MoS 2 /CuS coated mesh shows excellent underwater superlyophobicity and underliquid superhydrophobicity for gravity-driven immiscible organic solvent/water mixtures separation. Switchable permeation function of water-removing or organic solvent-removing can be achieved by water or organic solvent pre-wetted mesh. After 20 cycles of organic solvent/water separation, the MoS 2 /CuS coated mesh demonstrates high separation efficiency above 99.5% for both of cyclohexane/water mixture and tetrachloroethylene/water mixture. The MoS 2 /CuS coated mesh presents satisfactory chemical stability under acidic or alkaline conditions in the pH range of 1–13. The switchable superwetting property and chemical stability make it possible to be a potential candidate in separation of immiscible organic solvent/water mixture.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 4
·H215
·
IF 3.259
Xiaohui Song,Jinfeng Wang,Xingna Liu,Menglin Xie,Yongyong Wang,Xiao Dong,Yong Yan,Congxin Xia
CuS nanoplate films were synthesized on FTO conducting glass substrates via a facile microwave-assisted hydrothermal (MHT) route and applied directly as a low-cost and high-efficiency counter electrode (CE) for liquid-junction quantum dot-sensitized solar cells (QDSSC). The two-dimensional structure of nanoplate provide high surface area for more active catalytic sites and easy accessibility for polysulfide electrolyte, which leads to the remarkable decrease in charge transfer resistance and the enhancement of catalytic activity of CE. As a result, the liquid-junction QDSSC assembled with the prepared CuS-2 CE achieves maximum power conversion efficiency (PCE) of 4.97%, which is superior than that of CuS fabricated by conventional chemical bath deposition method based cell (PCE 4.06%) and the 100 nm thin sputtered Pt/FTO CE based cell (PCE 3.08%). Furthermore, the prepared CuS exhibits highly chemical stability in polysulfide electrolyte, resulting in reproducible performance. These results show the potential application of MHT synthetic method in preparing metal chalcogenide CE for high-performance liquid-junction QDSSC in the future.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2023
·Vol. 5
·期 18
·5029-5035
·
IF 4.7
Haoyu Wang,Xiaomeng Yue,Huanhuan Wu,Yeda Wan,Yujie Tong,Yang Zhao,Yijun Li,Jinbin Pan
Nanomaterial-mediated photothermal therapy (PTT) is a promising strategy for permanent male sterilization owing to its easy operation, rapid heating, minimal invasiveness, and high spatiotemporal controllability. However, the currently available PTT for male sterilization utilizes irradiation sources in the first near-infrared window (NIR-I), which may suffer from incomplete sterilization due to the insufficient penetration depth of NIR-I light. Herein, we developed a facile one-pot hydrothermal synthetic method of cysteine-coated copper sulfide (Cys-CuS) nanosheets for the second NIR window (NIR-II) PTT-mediated permanent male sterilization. In this method, Cys acted not only as a template but also as a sulfur resource in the formation of Cys-CuS nanosheets. The obtained Cys-CuS nanosheets possessed good photothermal properties and satisfied deep-tissue light response capacity under 1064 nm laser exposure. Given this, the permanent male sterilization in vivo was readily achieved by Cys-CuS nanosheets in a rapid manner (only 40 s). To the best of our knowledge, it is the first time that nanomaterial-mediated NIR-II PTT is applied for permanent male sterilization. We believe that the facilely prepared biocompatible Cys-CuS nanosheets can serve as a promising NIR-II light-responsive nanoknife to control the overpopulation of domestic pets and stray animals.
研究领域:
生物医学工程
·
材料科学
·
光热疗法
·
生殖医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-14
·
IF 10.6
Liu Xueyan,Hu Tingting,Jia Yijiang,Yang Shuqing,Yang Yu,Cui Zhuolin,Wang Tao,Liang Ruizheng,Tan Chaoliang,Wang Yuji
The rapid proliferation of tumors is highly dependent on the nutrition supply of blood vessels. Cutting off the nutrient supply to tumors is an effective strategy for cancer treatment, known as starvation therapy. Although various hydrogel-based biomaterials have been developed for starvation therapy through glucose consumption or intravascular embolization, the limitations of single-mode starvation therapy hinder their therapeutic effects. Herein, we propose a dual-function nutrition deprivation strategy that can block the nutrients delivery through extravascular gelation shrinkage and inhibit neovascularization through angiogenesis inhibitors based on a novel NIR-responsive nanocomposite hydrogel. CuS nanodots-modified MgAl-LDH nanosheets loaded with angiogenesis inhibitor (sorafenib, SOR) are incorporated into the poly(n-isopropylacrylamide) (PNIPAAm) hydrogel by radical polymerization to obtain the composite hydrogel (SOR@LDH-CuS/P). The SOR@LDH-CuS/P hydrogel can deliver hydrophobic SOR with a NIR-responsive release behavior, which could decrease the tumor vascular density and accelerate cancer cells apoptosis. Moreover, the SOR@LDH-CuS/P hydrogel exhibits higher (3.5 times) compressive strength than that of the PNIPAAm, which could squeeze blood vessels through extravascular gelation shrinkage. In vitro and in vivo assays demonstrate that the interruption of nutrient supply by gelation shrinkage and the prevention of angiogenesis by SOR is a promising strategy to inhibit tumor growth for multimode starvation therapy.
研究领域:
生物医学工程
·
癌症治疗
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）