JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Shanhao He,Dongmei Yang,Zuqi Li,Bin Li,Huiyan Pan,Zhiqiang Wang,Keliang Wu,Zhiyong Liu
To address the challenges of insufficient near-infrared light utilization and rapid charge recombination in traditional photocatalysts, this study designed and synthesized a hollow-structured Cu 2−x S@ZnIn 2 S 4 S-scheme heterojunction with synergistic photothermal-photocatalytic properties. The synergistic mechanism between plasmonic photothermal effects and heterojunction charge-transfer in broad-spectrum catalysis was systematically elucidated. Experimental results demonstrated that the composite achieved a hydrogen evolution rate of 32.58 mmol g −1 h −1 under AM 1.5G irradiation without cooling water (WCW), which is 3.00 times that of pure ZnIn 2 S 4 . Moreover, the solution temperature reached 47.4 °C under near-infrared (NIR) illumination. Theoretical analysis revealed that the localized surface plasmon resonance (LSPR) of Cu 2−x S extended light absorption into the NIR region and generated a photothermal effect. Meanwhile, the S-scheme band alignment, together with multiple light scattering induced by the hollow structure, synergistically optimized carrier separation and promoted directional charge migration. The catalyst exhibited excellent stability over 750 min and demonstrated measurable NIR-driven activity at wavelengths above 800 nm. By coupling band-engineering with photothermal conversion, this work provided a theoretical foundation and a material prototype for designing efficient full-spectrum solar-to‑hydrogen conversion systems, showing clear application potential in photothermal-assisted artificial photosynthesis.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 22
·4880-4888
·
IF 5.066
Dongxu Zhu,Aiwei Tang,Lan Peng,Zhenyang Liu,Chunhe Yang,Feng Teng
A simple low-cost and phosphine-free colloidal method was developed to prepare disk-shaped Cu2−xS nanocrystals (NCs) with different crystal structures and basal planes, which could be manipulated effectively by varying the Cu : S feed molar ratios and the amount of surfactants. The near-infrared (NIR) localized surface plasmon resonance (LSPR) wavelength could be tuned from 1133 to 1512 nm with the crystal phase changing from CuS (covellite) to monoclinic Cu7S4 (roxbyite) and Cu31S16 (djurleite). Phase transformation had more important effects on tuning the plasmonic resonance than the surface interaction of the deprotonated carboxyl functional group of oleic acid. Moreover, the crystal phase could transform from covellite to djurleite and the morphology underwent a transition from nanodisks to nanospheres when the post-treatment temperature of CuS nanodisks by dodecanethiol (DDT) was increased to 120 °C, but only a size decrease took place at room temperature. As a result, a slight red-shift of the LSPR wavelength was observed at room temperature, but an obvious red-shift from 1140 to 1910 nm with the change in crystal structure and morphology. The post-treatment temperature played an important role in tuning the plasmonic resonance of the products, which was closely associated with the variation of the crystal structure, morphology and surface properties.
研究领域:
纳米材料
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等离激元学
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胶体化学
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材料科学
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光学性质
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Keke Dong,Han Li,Chengjia Zhang,Man Zhou,Qian Liang,Yanan Wang,Zhongyu Li,Song Xu
Improving the stability and electron-hole separation efficiency of semiconductor photocatalysts has always been a hot topic in the field of catalysis. In the present study, a novel Cu 2-x S@Mn 0.3 Cd 0.7 S (Cu 2-x S@MCS) core-shell heterojunction has been constructed by the in-situ traditional hydrothermal reaction on the basis of hollow Cu 2-x S nanocubes. The optimized Cu 2-x S@MCS-2 photocatalyst with expanded light absorption exhibits excellent stability and a higher hydrogen evolution rate of 42.43 mmol g −1 h −1 , which is 2.3 times and more than 1400 times contrasting to the pure Mn 0.3 Cd 0.7 S and Cu 2-x S, respectively. Multiple characterizations and structure analysis revealed that the Cu 2-x S@MCS heterojunction possesses outstanding charge separation efficiency and a wider specific surface area which can provide abundant active sites. Furthermore, the mechanism of photocatalytic H 2 evolution for Cu 2-x S@Mn 0.3 Cd 0.7 S S-scheme heterojunction is also proposed. This work thus provides a favorable strategy to inhibit the photogenerated charge carrier recombination and drive highly efficient photocatalytic hydrogen generation by synthesizing photocatalyst with in situ core-shell structures.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2016
·Vol. 2016
·期 22
·3634-3640
·
IF 2.686
Qingshuang Liang
In this work, it is shown that both pure zincblende and wurtzite structures of Cu 2 SnS 3 (CTS) nanocrystals (NCs) have been synthesized by a facile one-spot heating-up procedure. By controlling the solvent ratios, different phase components of zincblende and wurtzite mix-phase CTS NCs were also obtained. The effect of different precursors and surfactants on the phase selectivity of CTS NCs was investigated, and a phase-controlled mechanism is proposed: the crystal structures of the resulting CTS NCs are related to the initial structure forms of the Cu x S seeds, and the different phase structures are formed as a result of the initial redox conditions. When the reaction was conducted under reducing conditions, Cu 2 S (or Cu 31 S 16 ) seeds were formed, leading to the formation of wurtzite CTS nanocrystals. When the conditions were less reducing, the initial CuS (or Cu 1.84 S) seeds resulted in the zincblende structure CTS nanocrystals. Graphical Different phase components of zincblende and wurtzite mix-phase Cu 2 SnSe 3 nanocrystals (NCs) were obtained. The phase selectivity of the Cu 2 SnSe 3 NCs is related to the initial redox conditions. Wurtzite Cu 2 SnSe 3 NCs formed because of the Cu 31 S 16 seeds, and the CuS seeds led to zincblende structure Cu 2 SnSe 3 NCs.
研究领域:
材料化学
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纳米材料
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晶体生长
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半导体纳米晶
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Jun Cao,Qing Sun,Ai-Guo Shen,Bing Fan,Ji-Ming Hu
Killing harmful bacteria in biofilms is a major challenge for current root canal therapy. Although traditional chemical disinfectants have a good bactericidal effect on plankton, they have little efficiency for the removal and sterilization of bacterial biofilms, and even lead to the emergence of bacterial resistance and high toxic side effects. Herein, we propose for the first time biosafe nanocomposites that integrate photothermal and peroxidase-like catalytic activity for efficient removal and killing of bacterial biofilms in root canals. The integration of gold (core) and copper (Ⅰ, Ⅱ) sulfide (shell) shows excellent catalytic effect, which can catalyze the decomposition of hydrogen peroxide at biosafe concentrations to hydroxyl radicals for efficient removal of biofilms. Moreover, studies on the mechanism of antibiofilm showed that the nanocomposites ( [email protected] 2-x S) have significant degradation effects on proteins and polysaccharides-the main components of biofilm. The in vitro results indicated that the synergism of free radical and heat shows higher sterilization rate against both gram-positive Enterococcus faecalis and gram-negative Fusobacterium nucleus , compared with free radical and heat treatment alone. More importantly, the bactericidal results on isolated dental slices and in root canal models and beagle dog demonstrated the [email protected] 2-x S is highly effective in inactivating the bacteria in biofilms. Hence this safe and synergistic antimicrobial system has great potential in antibiofilm-oriented root canal therapy.
研究领域:
医学
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材料科学
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微生物学
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DOI
高影响因子
RSC Advances
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2014
·Vol. 4
·期 97
·54547-54553
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IF 3.708
Xu Li,Aiwei Tang,Li Guan,Haihang Ye,Yanbing Hou,Guoyi Dong,Zhiping Yang,Feng Teng
Cu2−xS nanocrystals with different morphologies and crystal phases have been synthesized by using a simple one-pot and phosphine-free colloidal method, in which different alkanethiols (CnH2n+1SH, n = 8, 12, 18) have been selected as sulfur sources and capping ligands. The crystal phase can be transformed from monoclinic Cu1.94S to tetragonal Cu1.81S by varying the alkyl chain length of alkanethiols, and the morphology changes from nanospheres to nanodisks during the phase transformation. Strong localized surface plasmon resonance (LSPR) absorbance in the near-infrared (NIR) region has been observed in these Cu2−xS nanocrystals, which originates from excess holes in the valence band due to copper deficiencies. The alkyl chain length of alkanethiols plays an important role in the crystal phase, morphology and plasmonic properties of the as-obtained Cu2−xS nanocrystals.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qian Ren,Xiaojing Zhang,Yangyi Sheng,Nuo Yu,Maoquan Li,Zhigang Chen
Mild-temperature photothermal therapy (mPTT) has shown some advantages over traditional photothermal therapy, such as reducing the damage to surrounding healthy tissues and minimizing side effects. Nevertheless, cancer cells can easily repair damage caused by mild hyperthermia due to heat shock proteins (HSPs). Thus, it is imperative to maximize the mPTT efficiency by down-regulating HSPs overexpression and combining other cancer treatments. Herein, we report the synthesis of phytic acid (PA)-Cu 2+ framework/copper sulfide (Cu 2-x S) nanocomposites (abbreviated as PA-Cu/Cu 2-x S NPs) as the novel therapeutic platform that can down-regulate HSPs overexpression for enhanced multimodal mPTT/chemodynamic therapy (CDT)/chemotherapy. PA-Cu/Cu 2-x S NPs were prepared through self-assembly and in-situ vulcanization strategy, resulting in irregular-shaped particles with an approximate size of 100 nm. PA-Cu/Cu 2-x S NPs display a plasmon effect from Cu 2-x S, which enhances near-infrared (NIR) absorption and possesses excellent photothermal conversion efficiency (41.7%). Moreover, PA-Cu/Cu 2-x S NPs exhibit Fenton-like reaction activity resulting from the Cu ions for CDT, and the reaction activity can be further improved 1.3 times due to mild hyperthermia during mPTT. Furthermore, the generated hydroxyl radical (•OH) can effectively decrease HSPs level to enhance mPTT. PA-Cu/Cu 2-x S NPs can also serve as a drug delivery system, and they are capable of loading doxorubicin (DOX) with a loading ability (20.7%). Combining mPTT/CDT/chemotherapy exhibits significant inhibition of tumor growth. This approach can serve as a basis for designing more exquisite platforms that combine mPTT with other therapies to achieve more effective cancer treatment.
研究领域:
肿瘤学
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纳米医学
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生物材料科学
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 41
·6565-6572
·
IF 3.304
Jiani Gu,Yi Xie,Wenhui Chen,Chao Hu,Fen Qiao,Zhiyuan Xu,Xiaoqing Liu,Xiujian Zhao,Gaoke Zhang
We report inter-diffusion of as-synthesized covellite CuS nanocrystals (NCs) with Cu2+ cations at room temperature in the presence of a mild reducing agent (i.e., ascorbic acid). Unlike the previously-reported incorporation of Cu+ or Cu2+ ions with CuS that generates homogenous Cu2−xS NCs, the controlled diffusion of Cu2+ ions into the CuS NCs allows the formation of a unique CuS@Cu2−xS core–shell-like nanostructure as the intermediate and Cu2S NCs in the presence of excess Cu2+ ions. The CuS@Cu2−xS core–shell nanostructure can evolve into homogenous Cu2−xS NCs by further cation diffusion from the Cu2−xS shell toward the center (i.e. the CuS core) under E-beam irradiation during TEM test or when the core–shell NCs are stored in toluene for some time (e.g. four weeks). Notably, the CuS/paraffin composite with filler loading of 50 wt% and thickness of 1.95 mm displays a minimum reflection loss (RL) of −54.84 dB at 12.6 GHz. By adjusting the thickness in the range of 1–5 mm, the effective absorption bandwidth (below −10 dB, 90% microwave absorption) could reach 15 GHz (3–18 GHz). In particular, the diffusion of Cu2+ into CuS NCs leads to dampening of the NIR plasmon absorbance and a decrease in free carrier (i.e., hole) density and conductivity, which accounts for the confinement effect on the microwave absorption properties of the resulting samples.
研究领域:
材料科学
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纳米技术
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电磁材料
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Hanjun Chen,Ying Liu,Shaoqiong Feng,Yu Cao,Tingting Wu,Zhihong Liu
The abnormal expression of microRNAs (miRNAs) is associated with various diseases. Developing simple and portable methods for sensitive, rapid and simultaneous detection of multiple miRNAs is critical to achieve accurate and timely diagnosis. Herein, a cotton thread-based multi-channel photothermal biosensor was proposed for simultaneous detection of three breast cancer-related miRNAs including miRNA-10b, miRNA-27a and miRNA-let-7a. Three cotton thread-based channels with one input were designed and the capture probes for detecting different miRNAs were immobilized on the test zones of the corresponding channels. Cu 2-x S nanostrings prepared on the basis of hybridization chain reaction (HCR) were taken as the photothermal agents for signal transduction and amplification. The formation of a sandwich structure among the capture probe, target miRNA, and Cu 2-x S nanostrings led to the accumulation of the Cu 2-x S nanostrings on the test zones and transformed the concentration of miRNA into temperature signal under 808 nm laser irradiation . The temperature changes were quantified by a portable thermal camera and directly reflected the concentration of miRNAs. Under the optimal conditions, the developed multi-channel photothermal biosensor showed excellent specificity and sensitivity with the detection limits of 37 pM, 38 pM and 38 pM for miRNA-10b, miRNA-27a and miRNA-let-7a, respectively. Furthermore, a simultaneous detection of the three miRNAs in cell lysates were achieved and the results were in accordance with that obtained by the quantitative reverse transcription polymerase chain reaction (qRT-PCR), indicating its excellent capacity for practical applications. The developed biosensor provided an important tool for analysis of multiple targets and showed great potential in clinical diagnosis.
研究领域:
生物传感
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癌症诊断
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纳米技术
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2017
·Vol. 11
·期 2
·831-844
·
IF 7.354
Wang Yunhui,Li He,Zhang Yiyong,Peng Yueying,Zhang Peng,Zhao Jinbao
Owing to their unique structural stability and impressive long-term cycling performance, coated hollow structures are highly attractive for energy storage systems, especially batteries. Many efforts have been devoted and various strategies have been proposed to prepare such materials. In the present work, we propose a self-templating thermolysis strategy, different from traditional wet processing methods, to fabricate cuprous sulfide hollow spheres coated with different shells, by exploiting the thermal decomposition properties of the core (CuS) and the protection provided by the shell. To demonstrate the generality of this synthetic approach, three different coating materials (carbon, TiO 2 , MoS 2 ) have been chosen to prepare Cu 2– x S@C, Cu 2– x S@TiO 2 and Cu 2– x S@MoS 2 hollow spheres. All synthesized composite materials were then assembled as electrodes and tested in lithium batteries, showing excellent cycling stability. In particular, the electrochemical properties of Cu 2– x S@C were thoroughly investigated. The results of this work provide an alternative route to prepare coated metal sulfide hollow spheres for energy storage applications.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 48
·9908-9922
·
IF 6.331
Qi Xu,Qiuting Li,Zhe Yang,Piao Huang,Han Hu,Zhimin Mo,Zizhen Qin,Zushun Xu,Tianyou Chen,Shengli Yang
Lenvatinib (LT) is gradually replacing sorafenib as an alternative targeted drug against advanced hepatocellular carcinoma (HCC). However, the anticancer effects of LT are still limited because of its low cytotoxicity, multidrug resistance (MDR), and tumor relapse. Herein, we constructed a smart biophotonic nanoplatform to overcome the barriers preventing high performance. LT and copper sulfide nanocrystals (Cu2−xS NCs) with excellent photothermal properties in the near-infrared-II (NIR-II) zone were co-encapsulated in poly(D,L-lactide-co-glycolide) (PLGA) through nanoprecipitation. Both in vitro and in vivo evaluations demonstrated that Cu2−xS NCs enhanced the anticancer efficacy of LT, without recurrence. In addition, the presence of copper ions could allow glutathione (GHS) to be consumed and oxygen to be produced, likely suppressing the expression of P-glycoprotein (P-gp) and overcoming the issue of MDR relating to LT. More importantly, synergistic chemo-photothermal therapy with LT and Cu2−xS NCs was more effective than any single therapy or theoretical combination. This nanoplatform is promising for advancing future LT-based treatment strategies for HCC therapy.
研究领域:
肿瘤学
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纳米医学
·
药物递送系统
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生物材料
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DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Wen Zhang,Bo Li,Yuhan Zhu,Xin Yao,Xiaohe Tian,Shengli Li,Yupeng Tian,Dandan Li
It is considerably meaningful to fabricate a second near-infrared spectral region (NIR-II, 1000–1700 nm) responsive theranostic nanoplatform simultaneously possessing good stability and biocompatibility for efficient and safe cancer treatment. In this work, as a flexible strategy, an intelligent nanoplatform was prepared by using water-soluble cyclic oligosaccharides α-cyclodextrin (α-CD) to load photosensitizer Chlorin e6 (Ce6) onto Fe 3 O 4 @Cu 2−x S core−shell nanoparticles (NPs). The as-synthesized Fe 3 O 4 @Cu 2−x S-Ce6/α-CD NPs are ultrasmall (≈5 nm) and aqueously dispersible, which offer both biocompatibility and renal clearance. Resultly, the obtained Fe 3 O 4 @Cu 2−x S-Ce6/α-CD NPs feature remarkable absorption in the second near-infrared region (NIR-II), which can provide advantages of large penetration depth and high photothermal conversion efficiency (η = 67.88%). Additionally, the introduction of Ce6 can trigger the generation of 1 O 2 under visible light irradiation. Therefore, it provides the proof-of-concept application of functional materials in photodynamic and photothermal combination cancer therapy.
研究领域:
生物医学工程
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纳米技术
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癌症研究
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诊疗学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）