Journal of Energy Storage
·
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
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ziwei Yue,Xiaoliang Ji,Wei Zhou,Zhihao Ji,Fu Guo
Due to a lower intrinsic thermal conductivity , Cu 2 S-based thermoelectric materials are attracting extensive attention. However, they still confront the problem of higher electrical resistivity, which distinctly restricts their thermoelectric application. Herein, we synthesized Ag-incorporated Cu 2-x S micro/nano composites using a hydrothermal method . It was found that the doping of Ag nanoparticles could effectively enhance the electrical transport, while the generated nanopores , caused by the sintering of Ag nanoparticles during the SPS process, reduced the thermal conductivity. As a result, a maximum ZT value of ∼1.5 was obtained at 773 K in the Cu 2-x Ag δ S (δ = 0.5%) micro/nano composites, much higher than that of the pristine Cu 2-x S micro/nano composites. This work provides a new pathway to boosting thermoelectric performance through microstructural engineering.
研究领域:
材料科学
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能源科学
✓ 已验证
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
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Xiaoyan Zhang,Jinfei Zhou,Da-Peng Yang,Shaoyun Chen,Jiale Huang,Zibiao Li
Diatom frustules with hierarchical structures have been widely investigated in many fields due to their unique optical features, excellent mechanical resistance and extraordinarily intricate pore patterns. Herein, Cu 2-x S modified diatomite has been successfully fabricated for the first time via a mild method at room temperature. The Cu 2-x S nanoparticles with diameters of 50–100 nm were uniformly distributed on the diatomite. The as-prepared Cu 2-x S-diatomite (Cu 2-x S-DE) exhibits excellent photocatalytic degradation efficiencies for MB and MO, which reach to 99.1% and 96.9% respectively in 40 min under the irradiation of UV–vis light with 20 mg photocatalyst. The degradation mechanism of the organic pollutant over the Cu 2-x S-DE/H 2 O 2 reaction system was also proposed. This work provides an effective strategy to design and prepare of the diatom-based nanomaterials with efficient photocatalytic degradation activity, which is of great value for the environmental applications.
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tianyao Jiang,Lixia Li,Longhua Li,Yanhong Liu,Dongxu Zhang,Dongqi Zhang,Haitao Li,Baodong Mao,Weidong Shi
Electrocatalytic nitrogen reduction reaction (NRR) has been considered as an efficient and environment-friendly alternative method for NH 3 production. However, the balance between selectivity and catalytic activity is still one of the biggest challenges for developing efficient electrocatalysts. Here, we propose a simple method for the preparation of Cu 2-x S/MoS 2 electrocatalysts via epitaxial growth of an ultra-thin MoS 2 layer on monodispersed Cu 2-x S quantum dots. The highest NH 3 yield of 22.1 µg h - 1 mg cat. -1 and Faraday efficiency of 6.06% were obtained at -0.5 V (versus reversible hydrogen electrode) on Cu 2-x S/MoS 2 -2.5% with an ultrathin MoS 2 shell (~1 nm). But it started to decrease with further Mo/Cu ratio increase to 5% and 10%, due to the competition of hydrogen evolution and subsequent reduction of the Faraday efficiency. Further mechanism studies demonstrate that the delicate core/shell structure regulation with an ultrathin MoS 2 shell can enhance the nitrogen adsorption capacity, electrochemical active surface area, and charge transfer rate. A plausible mechanism was proposed for NRR on the Cu 2-x S/MoS 2 core/shell catalysts, where the controllable ultrathin MoS 2 layer can effectively increase the NRR performance at the interface while avoiding the unwanted enhancement of hydrogen evolution. This work provides a paradigm for enhancing activity and selectivity through rational core/shell nanostructure engineering for the design of NRR electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jun Zhang,Tingyang Xing,Min Zhang,Yunlong Zhou
Surface-enhanced Raman scattering (SERS) techniques benefit from the development of various substrates ranging from noble metal to semiconductor materials. Semiconductor substrates have been assumed to construct more specific structures and designable surface chemistry than noble metal substrates. Therefore, the development of semiconductor substrates may lead to the selective recognition of target molecules, more stable SERS spectra, and even low-cost fabrication of SERS substrates. In this paper, we disclose semiconductor supernanoparticles formed by a self-limiting assembly process with stable properties, easy scale-up fabrication, and high SERS enhancement. The detected concentration of analytes reaches as low as 10 −8 M. The built-in hotspots and self-doping in suprananoparticles provide strong electromagnetic enhancement, and the molecular resonance and charge transfer with the target molecule contribute to chemical enhancement. Discrete dipole approximation simulation was used to further confirm the SERS enhancement mechanism. Cu 2-x S supernanoparticles paved a new way to construct novel semiconductors with SERS activity.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 23
·4119-4129
·
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
·
肿瘤学
✓ 已验证
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
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 7
·3408-3414
·
IF 10.733
Song Ma,Kai Chen,Yun-Hang Qiu,Li-Li Gong,Gui-Min Pan,Yong-Jie Lin,Zhong-Hua Hao,Li Zhou,Qu-Quan Wang
Substantial effort has been devoted to synthesizing plasmonic metal/semiconductor heteronanostructures with controlled morphology owing to their excellent performance ranging from photocatalysis to optical information processing. However, growing semiconductor heterojunctions with both counterparts in direct contact with the plasmonic metal nanostructures remains challenging. Herein, we report a three-step method to grow CdS–Cu2−xS lateral heteroshells on Au nanoparticles with all components directly connected with each other. Ag2S semi shells are initially grown on the Au nanoparticles as an interim layer, Cu2−xS semi shells are then grown on the uncovered surface of the Au nanoparticles, and CdS is generated by replacing Ag2S and the Au core complex with CdS–Cu2−xS lateral heteroshells Au/CdS–Cu2−xS is finally obtained. These complexes integrate the plasmon resonances of Au in the visible region and that of Cu2−xS in the near-infrared region, and therefore show improved photocatalytic activity and high photothermal efficiency. This study offers a synthetic approach to grow metal sulfides on Au nanostructures which have diverse applications in photocatalysis and photothermal therapy.
研究领域:
材料科学
·
纳米技术
·
光化学
✓ 已验证
产品关联
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
·
环境科学
·
化学工程
✓ 已验证
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
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
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
·
肿瘤治疗学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）