ECS Journal of Solid State Science and Technology
·
2023
·Vol. 12
·期 7
·076009
·
IF 2.2
Chengsha Huang,Jin Li
The low-temperature hydrothermal and water bath methods are used to manufacture CuS@ZnO/CdS catalyst. The Rhodamine B degradation rate constant of CuS@ZnO/CdS is around 1.53 × 10−2 min−1, which is 3.9 times greater than that of ZnO. The coupling of CdS and loading of CuS onto ZnO surfaces were evaluated using XRD, SEM, TEM, and XPS. SEM demonstrated that 5 mg of CdS was the most effective in controlling the shape of ZnO nanoflakes. Ultraviolet-visible absorption (UV–vis) and Photoluminescence (PL) spectra reveal that CdS and CuS decreased the bandgap of ZnO and boosted its ability to absorb visible light. Transient photocurrent response (TPR) and electrochemical impedance spectra (EIS) display that CdS and CuS facilitate the quick separation of photoexcited carriers in ZnO. Notably, the optimal weight ratio of CuS was determined to be 15%, since excessive amounts of CuS would operate as recombination centers and cover active sites. Additionally, the dual Z-scheme carriers movement mechanism was proposed using sacrificed agent experiments, and TOC analyzed the mineralization rate of RhB after degradation. In this study, CuS@ZnO/CdS photocatalyst degraded RhB nearly 99% in 80 min, which is superior to the earlier photocatalysts. Therefore, this article holds great significance in the practical application of metal chalcogenide-modified ZnO-based photocatalysts with superior visible light-induced degradation performance in environmental purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
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
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·076502
·
IF 4.386
Zhuangzhuang Yin,Shihan Qi,Shangkun Deng,Jun Guo,Wei Gan,Peng Chen,Chunsheng Ding,Ziliang Li,Jianrou Li,Yuqing Lu,Ziwei Zhao,Qi Ling,Miao Zhang,Zhaoqi Sun
Transition metal sulfides are widely used for the modification of TiO2 to improve its light absorption range due to their small bandgaps. In this work, novel CoS/CuS/TiO2 was synthesized via a simple one-pot hydrothermal preparation method. Using various characterization techniques, CoS/CuS/TiO2 was found to demonstrate excellent photoelectrochemical performance and photocatalytic activity for the degradation of tetracycline hydrochloride. The CoS/CuS/TiO2 catalyst showcased a maximum photocurrent density of 55 μA cm−2, which was 7.8 times higher than that of unmodified TiO2 nanorods. Under visible light irradiation using Xe lamp, the photocatalytic degradation efficiency of CoS/CuS/TiO2 on tetracycline hydrochloride was found to be significantly improved, where it recorded an excellent degradation rate of 64.0% at 90 min. The charge transfer mechanism of the proposed material was also investigated.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jian Cheng,Xu Wang,Gongchu Shi,Shihao Zhang,Yanyu Zhou,Yanchao Cui,Jia Wang,Baoping Xin
In this study, CuS quantum dots (QDs) synthesized through biological method were used as photocatalysts for the photocatalytic degradation of polyethylene (PE) plastics. Bio-CuS QDs were synthesized through a green process using sulfate reducing bacteria, while Che-CuS QDs were prepared by chemical precipitation for comparison. The crystal structure, surface morphology, microstructure and optical properties of the samples were detected by XRD, SEM, TEM and UV–Vis DRS. The green synthesis mechanism of Bio-CuS was inferred by analyzing changes in amino acid concentration and the three-dimensional fluorescence spectra of extracellular polymeric substances before and after synthesis. The photocatalytic degradation of PE films by Che-CuS and Bio-CuS was investigated. The weight loss rates of PE+Che-CuS and PE+Bio-CuS were 9.1 % and 12.8 % after 14 d irradiation, respectively, while pure PE was only 1.7 %. Furthermore, SEM, UV–Vis DRS, contact angle, TGA, GPC and FTIR were adopted to characterize the PE film. The results revealed that PE+Che-CuS and PE+Bio-CuS underwent major changes in morphology, transparency, hydrophilicity, thermal stability, molecular weight and functional groups compared with PE, with more pronounced changes observed for PE+Bio-CuS. The quenching experiments of active species showed that h + and·OH were critical to the PE degradation. The intermediate products of PE degradation were analyzed by GC–MS, and a possible degradation pathway was proposed. In addition, the possible mechanism of photocatalytic degradation of PE films by CuS QDs was proposed. This work provides a green remediation approach to addressing the growing plastic pollution in the environment.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Zonghan Hu,Qi Wang,Zihang Wang,Lanlan Zhang,Chengwei Hu,Yuanhu Lei,Yupei Qiao,Bing Lv
Currently, the two predominant heterojunction types, namely type II and S-scheme heterojunctions, are extensively employed in photoelectrochemical (PEC) water splitting for hydrogen production. However, type II heterojunctions suffer from the drawback of diminished oxidation-reduction capability. In this work, S-scheme CdIn 2 S 4 /CuS (CIS/CuS) heterojunction nanoblocks (NBs) photoanode is constructed for the first time by a hydrothermal and the successive ionic layer adsorption and reaction (SILAR) methods. The heterojunction achieves a photocurrent density of up to 4.0 mA/cm 2 at 0 V vs. Ag/AgCl, 2.37 times that of the pure CIS NBs photoanode. X-ray photoelectron spectroscopy (XPS), Tauc plots, Mott-Schottky (M − S) tests and density functional theory (DFT) calculations reveal the formation of S-scheme band structure between the interface of CIS and CuS. As a result, the significantly enhanced PEC water splitting performance of CIS/CuS NBs photoanode is attributed to the superior light absorption ability of CuS and the effective charge separation achieved by S-scheme band structure between the interface of CIS and CuS. This work also provides new ideas and strategies for designing efficient S-scheme heterostructures for efficient PEC water splitting.
研究领域:
材料科学
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能源科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Silong Wang,Zhihua Sun,Yuhao Wang,Taixin Liang,Baoguo Wang,Chunfang Fan,Yanjun Chen,Changcheng Liu,Que Huang
CuS-based composites are widely used in the fields related to photothermal energy storage and electromagnetic shielding and are excellent candidates for composites with phase change materials. To meet the requirements of micro-integration and electromagnetic resistance of electronic products and optimize the thermal management of electronic products, it is necessary to prepare new flexible composite phase change materials. In this paper, through the design of MPC@Ni Al-LDH/CuS double-layer structure, two-step vacuum filtration method is used, and the highly conductive materials CuS and MPC are introduced into the manufacture of PCM films. With the help of Ni Al-LDH, flame retardancy is introduced. The electromagnetic wave absorption performance is enhanced, and the existence of nano-cellulose (CNF) makes the film have excellent mechanical properties. Ni Al-LDH/MPC and CuS substrates with stable and high mechanical properties are prepared by ultrasonic treatment. According to scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC) and thermogravimetry (TG) characterizations, PEG successfully entered the MPC/CuS skeleton by vacuum filtration, and flexible phase change composite bilayers (MLPC) were obtained. Due to the synergistic effect of structure and components, the obtained composite film has many different excellent functions. Specifically, when MPC@Ni Al-LDH is 15 wt%, the phase transition enthalpy, thermal conductivity, electromagnetic shielding, and electrical conductivity are 146.8 J/g, 1.07 W/m·K, 38.8 dB and 126.4 S/m, respectively. The 3600 s infrared temperature measurement results show that the sample has stable thermal properties. Due to the presence of CuS, when MPC@Ni Al-LDH is 5 wt%, its absorbance can be kept at 1.51 L/(g·cm), and its photothermal conversion efficiency can reach 90.6 %. The MPC/CuS structure in the composite film provides many heat transfer channels, which reduces the phonon scattering in the heat transfer process and significantly increases thermal conductivity. Therefore, this multifunctional flexible phase change film can be used in photothermal conversion devices and for thermal management of electronic equipment, and it has broad application prospects in wearable equipment design due to its excellent electromagnetic shielding ability and infrared thermal stealth ability.
研究领域:
材料科学
·
能源科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Zhang,Jiasheng Li,Quanxi Zhang,Donggang Guo
Constructing a Z-scheme photocatalytic system offers great advantages for boosting photocatalytic performance due to its effective charge carrier transfer and strong redox capability. Herein, Cu 2 S/CuS nanosheets heterojunction were prepared by a facile one-pot solvothermal method. CuS/Cu 2 S Z-scheme heterojunction realized rapid bacteria-killing under near-infrared (NIR) irradiation. The optimized CuS/Cu 2 S (CuS/Cu 2 S-1) achieved 99 % antibacterial efficiency against Escherichia coli ( E. coli ) within 10 min NIR irradiation. Owing to the optimization of CuS/Cu 2 S-1 Z-scheme heterojunction, the efficient interfacial charge separation was realized, thereby resulting in a high yield of reactive oxygen species. Moreover, the heterojunction exhibited locally a higher temperature under NIR irradiation, favorable for eradicating bacteria. In addition, radical scavenging tests and ESR spectra results showed that ⋅O 2 – , ⋅OH and 1 O 2 were main active species responsible for sterilization. Under the synergy of photocatalytic and photothermal effects, the membrane structure of bacteria was severely damaged in CuS/Cu 2 S-1 system. This study not only offers a reliable approach for photothermocatalytic inactivation, but also affords the bases for the development of Z-scheme heterojunction aimed at designing highly efficient photocatalysts.
研究领域:
材料科学
·
生物医学工程
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2018
·
IF 0.824
Xue WANG,Cheng-Ling TANG,Jia-Jun LIU,Hong-Zhi ZHANG,Jian WANG
As the main final products of the purine metabolism in human body, uric acid (UA) usually presents in serum and urine. Thus, the level of UA in biology is closely related to human health. In this work, the ultra-small CuS nanoparticles (NPs) were demonstrated to possess intrinsic peroxidase-like activity towards 3,3',5,5'-tetramethylbenzidine (TMB) substrate in the presence of H 2 O 2 , which yielded the blue oxidized TMB (oxTMB) with strong absorption at 653 nm. Furthermore, H 2 O 2 could be produced by the enzymatic reaction between UA and uricase to yield the blue oxTMB with the peroxidase mimetics activity of CuS NPs, which provided a sensitive and colorimetric method for UA detection with a linear range from 1.0 × 10 −6 M to 1.0 × 10 −4 M and a detection limit of 1.0 × 10 −7 M. Moreover, the proposed method was successfully applied to the determination of UA in human serum samples, which supplied a similar result to the clinical method.
研究领域:
生物化学
·
医学诊断
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2018
·Vol. 133
·期 3
·1417-1428
·
IF 2.209
Xu Bin,Zhang Caixia,Chen Chenghua,Zhou Jing,Lu Congda,Ni Zhongjin
Paraffin wax (PW) is a solid–liquid organic phase change material (PCM). However, the low thermal conductivity and poor light–heat conversion performance limit its feasibility in solar thermal storage applications. In this paper, CuS-decorated carboxyl multi-wall carbon nanotubes (MWCNTs)/PW light–heat conversion composite PCMs were prepared by one step. The structure and properties of the composite PCMs were studied by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, differential scanning calorimeter, thermogravimetric analysis, coefficient of thermal conductivity, UV–visible–near infrared spectrometer and light–heat conversion testing. The results showed that the light–heat conversion performance of CuS–MWCNTs/PW composite PCMs were better than that of MWCNT/PW composite PCMs with the same mass fraction. Therefore, it is expected that this research will open up new avenues of study for the creation of advanced composite PCM with excellent light–heat conversion performance.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chaorui Xue,Qian Zhang,Yang Shen,Shengliang Hu,Qing Chang,Huiqi Wang,Ning Li,Jinlong Yang
Utilizing inexhaustible solar energy to realize water purification is a green and sustainable solution to water pollution. Herein, a laser thermal method was adopted to prepare reduced graphene oxide/CuS nanocomposites (rGO/CuS) for solar-driven water purification. By laser treatment of aqueous NaOH solution containing graphene oxide, CuCl 2 , and thiourea, rGO was formed, and CuS was anchored on the rGO surface at an elevated temperature. The prepared rGO/CuS showed high photothermal conversion ability, and the water evaporation enthalpy was reduced for rGO/CuS loaded melamine sponge (rGO/CuS-MS). A notable high solar-driven water evaporation rate of 2.09 kg•m −2 •h −1 was achieved for rGO/CuS-MS under 1.0 kW•m −2 solar irradiation. Integrating with the adsorption ability, the rGO/CuS-MS demonstrated efficient removal capacity of rhodamine B (RhB), volatile m-dinitrobenzene (m-NB), and Ni 2+ in water under solar irradiation. The results indicated that the water evaporation could enhance the RhB, m-NB, and Ni 2+ adsorption capacity of rGO/CuS-MS. Both the unevaporated and distilled water can be efficiently purified by rGO/CuS-MS under solar irradiation. Also, increasing solar flux showed contribution to higher RhB removal ratio for the accelerated water evaporation. This study could contribute to preparing rGO-based nanocomposites for water resources remediation applications.
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
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
ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Yue Kong,Zishuo Hou,Liangqin Zhou,Panfeng Zhang,Yaowen Ouyang,Peiwen Wang,Yuanwei Chen,Xianglin Luo
Injectable self-healing hydrogels containing functional nanoparticles (NPs) have attracted much attention in many fields of biomedicine. A series of injectable self-healing hydrogels containing PEGylation CuS NPs based on N-carboxyethyl chitosan (CEC) and oxidized sodium alginate (OA) were developed by taking advantages of the unique functions of CuS NPs and chitosan, referred to as CuS NP hydrogels or CEC–OAm–CuSn, where “m” stands for the concentration percentage of the added OA solution (w/v) and “n” represents the molar concentration of CuS NPs in the hydrogels. The physical properties of CuS NP hydrogels, syringeability, rapid self-repair ability, and photothermal performance were systematically investigated. The multiple functions for CuS NP hydrogels requested in the skin healing process were explored. The results showed that CuS NP hydrogels had not only adjustable physical properties and good injectable self-healing characteristics but also excellent functionalities, concurrently including hemostatic ability, bacteria killing capability, and cell migration and proliferation promotion. In vivo wound healing and histomorphological examinations of immunofluorescence staining in a mouse full-thickness wound model demonstrated good acceleration effects of these hydrogels for infected wound healing. Therefore, these injectable self-healing CuS NP hydrogels which possess the abilities of hemostasis, antibacterial activity, and infected-wound healing promotion exhibit great potential as in situ wound dressings.
研究领域:
生物材料学
·
医学工程
·
组织工程
✓ 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）