Journal of Energy Storage
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2024
·
IF 8.9
Min Li,Chao Shen
In order to improve the photothermal conversion performance of a phase change material (PCM) PEG2000, a photothermal conversion material Cu 2-x S was introduced to enhance its light absorbance. The influence of S/Cu stoichiometry and Fe 3+ doping modification ratio on the photoabsorption performance of Cu 2-x S was studied. The composite with photothermal conversion performance was obtained by combining PEG2000. The results show that Cu 2-x S (S2) doped with Fe/Cu stoichiometry ratio of 0.3:1 exhibits the best light absorption performance. Moreover, a small amount of additive of the modified Cu 2-x S (Cu 2-x Fe y S, 1.0 wt%) can greatly increase photothermal conversion and energy storage efficiency. The prepared composite can meet the practical application in the field of solar photothermal conversion.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-11
·
IF 5.3
Ai Ding,Yu Hao,Han Yuting,Chang Yuan,Ma Yanhao,Wu Chenglong,Liu Mengning,Zhu Yongsheng,Li Shengbin,Dong Chengye,Cheng Yonghong
Detecting dopamine (DA) in biological samples is vital to understand its crucial role in numerous physiological processes, such as motion, cognition, and reward stimulus. In this work, p-type graphene on sapphire, synthesized via chemical vapor deposition, serves as substrate for the preparation of p-type Cu 2-x S films through solid-phase sulfurization. The optimized Cu 2-x S/graphene heterostructure, prepared at 250 °C using a 15-nm copper film sulfurized for 2 h, exhibits superior electron transfer performance, ideal for electrochemical sensing. It is confirmed that the spontaneous charge transfer from graphene to Cu 2-x S, higher Cu(II)/Cu(I) ratio (~ 0.8), and the presence of well-defined nanocrystalline structures with an average size of ~ 35 nm in Cu 2-x S significantly contribute to the improved electron transfer of the heterostructure. The electrochemical sensor based on Cu 2-x S/graphene heterostructure demonstrates remarkable sensitivity towards DA, with a detection limit as low as 100 fM and a dynamic range greater than 10 9 from 100 fM to 100 μM. Additionally, it exhibits excellent selectivity even in the presence of uric acid and ascorbic acid 100 times higher, alongside notable storage and measurement stability and repeatability. Impressively, the sensor also proves capable of detecting DA concentrations as low as 100 pM in rat serum, showcasing its potential for clinically relevant analytes and promising applications in sensitive, selective, reliable, and efficient point-of-care diagnostics. Graphical Abstract
研究领域:
生物医学工程
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分析化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 23
·4119-4129
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IF 4.872
Xiaolong Liu,Xinyi Lin,Ming Wu,Ruhui Lin,Buhong Li,Jingfeng Liu
Considerable efforts have been made to incorporate both diagnostic and therapeutic functions into a single nanoplatform for biomedical applications. Herein, we report the synthesis and characterization of magnetite-loaded polymeric micelles (referred as SCDP-LA) for targeted magnetic resonance imaging (MRI) and photothermal therapy of hepatocellular carcinoma (HCC), by using an amphiphilic biocompatible polymer of lactobionic acid-modified 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-PEG-LA) for the micelle formation. A cluster of SPION@Cu2−xS is densely encapsulated inside the hydrophobic core of the micelles, which offers both highly sensitive MRI and an excellent photothermal effect. The LA-modified PEG outlayer makes this micelle stable in aqueous solution. Due to the targeting ligand of LA, the SCDP-LA clusters could be selectively internalized into the hepatocellular cell line (HepG2 cells) but not into HeLa cells. In addition, the targeted ability of the SCDP-LA aqueous solution was further confirmed by enhanced MRI with a shorter T2 relaxation time in HepG2 cells. Meanwhile, it also demonstrates excellent performance to produce significantly enhanced local photothermal killing efficiency against HepG2 cells under NIR laser irradiation. In summary, the present multifunctional nanoplatform based on SPION@Cu2−xS nanoclusters will be a promising theranostic platform for targeted MRI-guided photothermal therapy.
研究领域:
生物医学工程
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肿瘤学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Dongxu Zhang,Yanhong Liu,Baodong Mao,Haitao Li,Tianyao Jiang,Dongqi Zhang,Weixuan Dong,Weidong Shi
Electrochemical nitrogen reduction reaction (NRR) is considered as one of the most promising methods for NH3 synthesis under room temperature and ambient pressure. A grand challenge of NRR is the development of efficient electrocatalysts, for which the delicate nanostructuring of catalysts plays an important role. Herein, a series of Fe-doped Cu2–xS quantum dots (QDs) are synthesized with multiple active sites and interface engineering, in which the double-phase heterostructure plays a key role for boosting NRR activity. The yield of NH3 was obviously improved with the increase of Fe content from 0 to 3% but started to decrease with Fe from 3 to 9%. The optimized Fe3%–Cu2–xS QDs show an outstanding NH3 yield of 26.4 μg h–1 mg–1cat at −0.7 V (vs the reversible hydrogen electrode), which is 5 times higher than that of Cu2–xS QDs. More importantly, we observed that the highest NRR activity in Fe3%–Cu2–xS QDs was ascribed to the formation of an inherent double-phase heterostructure of Cu2–xS/Cu5FeS4, whereas the complete conversion to single-phase Cu5FeS4 with increased Fe doping (9%) resulted in the activity decrease. Further, N2 temperature-programmed desorption and electrochemical impedance spectra characterizations confirm the stronger chemical adsorption of N2 and faster charge transfer in the Cu2–xS/Cu5FeS4 QDs. A plausible mechanism was proposed for the double-phase Cu2–xS/Cu5FeS4 heterostructure, where the interface provides efficient charge transfer and more active sites of Cu, Fe, and S for the synergetic adsorption and activation of N2. Our work provides a simple strategy for the design of NRR electrocatalysts, which may also bring new inspiration for the preparation of the inherent double-phase heterostructure within other doped QDs.
研究领域:
材料科学
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电化学
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催化科学
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 31
·2202544
·
IF 15.153
Yichao Wang,Meijie Liu,Chunxu Wu,Jiapeng Gao,Min Li,Zipeng Xing,Zhenzi Li,Wei Zhou
Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu 2-x S nanoboxes, and then simple hydrothermal reaction is used to make core-shell Cu 2-x S@ZnIn 2 S 4 S-scheme heterojunctions. The photothermal and photocatalytic performance of Cu 2-x S@ZnIn 2 S 4 is improved. In an experimental hydrogen production test, the Cu 2-x S@ZnIn 2 S 4 photocatalyst produces 4653.43 µmol h −1 g −1 of hydrogen, which is 137.6 and 13.8 times higher than pure Cu 2-x S and ZnIn 2 S 4 , respectively. Furthermore, the photocatalyst exhibits a high tetracycline degradation efficiency in the water of up to 98.8%. For photocatalytic reactions, the hollow core-shell configuration gives a large specific surface area and more reactive sites. The photocatalytic response range is broadened, infrared light absorption enhanced, the photothermal effect is outstanding, and the photocatalytic process is promoted. Meanwhile, characterizations, degradation studies, active species trapping investigations, energy band structure analysis, and theoretical calculations all reveal that the S-scheme heterojunction can efficiently increase photogenerated carrier separation. This research opens up new possibilities for future S-scheme heterojunction catalyst design and development.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 29
·10335-10343
·
IF 7.367
Jiale Liu,Ye Tian,Zhennan Wu,Lin Ai,Yi Liu,Jianli Cui,Weili Yu,Hao Zhang,Bai Yang
Self-assembly and crystallization are two common methods to control the morphologies of nanomaterials, which have many similarities. In this work, chloride is used to direct the self-assembly process of Cu nanoclusters and the subsequent growth of Cu2−xS nanocrystals. Meaningfully, chloride both promotes the transformation of Cu nanocluster self-assembled architectures from one-dimensional (1D) to 2D, and facilitates the transformation of Cu2−xS nanocrystals from nanorods to nanosheets. Such an influence is attributed to the selective adsorption of chloride ions on the specific facets of nanoclusters and nanocrystals, which alters the inter-nanocluster weak interactions during self-assembly and suppresses the activity of Cu2−xS facets during nanocrystal growth. The current results indicate that the method used to direct the morphologies of nanocrystals is extendable to control the tendency of nanocluster self-assembly.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
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2021
·Vol. 9
·期 35
·7216-7228
·
IF 6.331
Kaimin Du,Shuang Zhao,Jing Feng,Xuan Gao,Kai Liu,Xiaozhen Wang,Manli Zhang,Yao Li,Yu Lu,Hongjie Zhang
The integration of chemodynamic therapy (CDT) and photothermal therapy (PTT) has played a huge role in improved anticancer treatments. Here, a novel multifunctional nanoplatform based on Cu2−xS conjugated NaYF4:Yb/Er@NaYF4:Yb upconversion nanoparticles (UCNPs) was proposed and designed. In the UCNPs–Cu2−xS nanocomposites, UCNPs with excellent luminescent properties and a high X-ray attenuation coefficient can serve as an upconversion luminescence (UCL) and computer tomography (CT) imaging contrast agent; meanwhile, Cu(II) in the Cu2−xS nanodots enables the nanocomposites to have a magnetic resonance imaging (MRI) ability owing to the presence of unpaired electrons. Moreover, the Cu2−xS nanodots with a strong absorbance in the NIR II biowindow not only could be employed as a stable photothermal agent under NIR laser irradiation, but also could be used as a photothermal-enhanced Fenton nanocatalyst to respond to over-expressed H2O2 in the tumor microenvironment (TME) and generate toxic hydroxyl radicals (˙OH) to effectively kill cancer cells. Furthermore, the UCNPs–Cu2−xS nanocomposites possess negligible cytotoxicity and a high photothermal conversion efficiency (43.8%) in the NIR-II biowindow (1064 nm), indicating that they possess great potential for the UCL/CT/MR multi-modal imaging guided synergistic enhanced CDT/PTT of cancer.
研究领域:
生物医学工程
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肿瘤治疗学
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材料科学
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DOI
高影响因子
CRYSTENGCOMM
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2014
·Vol. 16
·期 37
·8684-8690
·
IF 3.858
Haihang Ye,Aiwei Tang,Chunhe Yang,Kai Li,Yanbing Hou,Feng Teng
High-quality rhombohedral digenite (Cu1.8S) nanocrystals (NCs) were synthesized using a facile one-pot approach, in which foreign metal ions (Zn2+ and Cd2+) were added to drive a transformation in the phase and morphology of the as-obtained Cu2−xS NCs. During this process, the as-obtained products could transform from monoclinic djurleite (Cu1.94S) NCs to rhombohedral Cu1.8S NCs in the presence of Zn2+ and Cd2+ ions by extending the reaction time and increasing the reaction temperature, which could provide sufficient energy to overcome activation energy barriers. Moreover, we further studied the evolution of the plasmonic properties of the as-obtained Cu2−xS NCs, and the near-infrared (NIR) localized surface plasmon resonance (LSPR) absorption wavelength could be tuned by varying the amount of Zn2+ and Cd2+ ions added into the reaction system, which was in close association with the change in copper deficiencies and free hole densities induced by foreign metal ions.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yu Rao,Penghua Liang,Chenxiao Guo,Xize Chen,Minglei Cao,Chuankun Zhang,Rui Tong,Kongjun Zhu
Metal sulfide is a promising anode material for lithium-ion batteries due to their unique layered structure and high theoretical specific capacity. However, the challenge lies in enhancing electronic conductivity and cycling stability. An effective method to enhance the rate capability and cycle performance of metal sulfide materials is to construct the hybrid structure. In this paper, the interfacial engineering of multiple sulfides is explored to develop ideal lithium-ion storage anode materials. Hence, the one-step mixed hydrothermal method was used to synthesize the Cu 2-x S/ZnS hybrid structure. The synthesized Cu 2-x S/ZnS hybrid structure exhibits better lithium storage performance and higher electronic conductivity compared with the single Cu 2-x S, which has resulted from the existence of the phase interface generating the built-in electric field and boosting Li + storage properties at the phase interfaces. In comparison with the single Cu 2-x S, the results display that the Cu 2-x S/ZnS hybrid structure shows enhanced rate capability and prominent long-term cycling performance (416.9 mAh g −1 at 1 A g −1 after 1300 cycles). This strategy demonstrates that the construction of hybrid structure can improve the electronic conductivity and structure stability for other advanced anode materials.
研究领域:
材料科学
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电化学
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纳米技术
·
储能
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 4
·678-685
·
IF 3.382
Xiao Shao,Tianyong Zhang,Bin Li,Yue Wu,Xiaoyuan Ma,Jingchao Wang,Shuang Jiang
Copper sulfide (Cu2−xS) is a kind of cation deficient transition metal sulfide, which has attracted great interest due to its unique properties that arise from degenerate vacancy-doping, particularly its tunable localized surface plasmon resonance (LSPR) properties. In this work, a range of vacancy-doped Cu2−xS nanocrystals (NCs) (Cu1.2S, Cu1.4S, Cu1.75S, and Cu1.94S NCs) with a size of around 10 nm was prepared with tunable LSPR through a hot injection method. The doping level was manipulated effectively by varying the injection volume of sulfur powder–oleic acid (S–OA) to finely tune the LSPR wavelength. Cu2−xS NCs with four different doping levels were investigated as photocatalysts for degradation of dyes. The Cu1.94S NCs with the highest LSPR energy exhibited the best photocatalytic activity due to the highest free carrier density, presumably influenced by Cu vacancies and the volume of the S–OA solution. Theoretical calculations of the free carrier density of Cu2−xS NCs are consistent with the order of the photocatalytic activity. The results demonstrate that the correlation of the photocatalytic activity with the corresponding concentration of free holes and the LSPR wavelength is of interest, which will provide inspiration for the design of non-noble metal catalysts by regulating the free hole concentration in degenerate p-doped Cu2−xS caused by cation vacancies.
研究领域:
材料科学
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纳米技术
·
化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 10
·636
·
IF 4.8
Hui Zhu,Mengzhe Zhao,Yang Chao,Jun Yao,Qin Yu,Na Sun
Non-stoichiometric copper sulfide (Cu2-xS) nanomaterials are promising antibacterial agents, but the role of morphology in regulating their bactericidal performance remains poorly understood. Herein, we rationally design two types of Cu2-xS nanostructures, namely nanoplates (NPs) and superparticles (SPs). Both materials were prepared via a ligand-directed synthesis method with the comparable sizes, surface ligands, and crystal phase. The antibacterial behaviors of Cu2-xS NPs and Cu2-xS SPs againstEscherichia coli(E. coli) andStaphylococcus aureus(S. aureus) were investigated under dark and 808 nm near-infrared (NIR) light irradiation. The results showed that under NIR light irradiation, Cu2-xS SPs exhibit a markedly higher bactericidal efficiency against bothE. coliandS. aureusthan Cu2-xS NPs, leading to almost complete eradication of bacterial colonies. Notably,S. aureusshows more sensitive thanE. coli, and significant growth inhibition is observed even in the absence of laser irradiation. Mechanistic investigations reveal that hierarchical assembly of primary nanoparticles in SPs can promote multiple internal light scatterings, thereby significantly enhancing light harvesting efficiency and further improving the photothermal conversion efficiency. In addition, the SPs exhibited higher peroxidase-like activity, resulting in enhanced reactive oxygen species (ROS) generation and aggravated oxidative damage, and the accelerated Cu2+release kinetics strengthens ionic toxicity.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Meiling Yang,Xiaofang Liu,Bin Zhang,Yao Chen,Hengyang Wang,Jian Yu,Guoyu Wang,Jingtao Xu,Xiaoyuan Zhou,Guang Han
Cu2S, consisting of Earth-abundant and eco-friendly elements, is a promising candidate for thermoelectric energy conversion. The stoichiometric Cu2S has intrinsically low thermal conductivity together with meagre electrical conductivity. Herein, in order to improve the electrical properties, we develop a facile solvothermal method for synthesizing a series of Cu2–xS with tunable phase compositions. With reduction in the CuCl/Na2S molar ratio in the solution precursors from 2:1 to 1.75:1, the solvothermal products transform from single-phase Cu2S into Cu2S–Cu1.96S composites, which are preserved in the hot-pressed pellets. The decreased CuCl/Na2S molar ratio results in increased room-temperature Hall carrier concentration, leading to enhanced electrical conductivity. Specifically, the pellet corresponding to the 1.75:1 CuCl/Na2S precursor ratio obtains a power factor of 8.04 μW cm–1 K–2 at 815 K, which is ∼735% of the value obtained by stoichiometric Cu2S. Along with the moderate thermal conductivity, this sample achieves an enhanced zT value of 0.87 at 815 K, representing a ∼250% increase when compared to stoichiometric Cu2S. This study demonstrates an effective strategy in enhancing the thermoelectric performance of solution-synthesized Cu2S-based materials by phase tuning.
研究领域:
材料科学
·
能源材料
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）