Journal of Physical Chemistry C
·
2018
·
IF 4.484
Guodong Yu,Aili Liu,Huile Jin,Yangzong Chen,Dewu Yin,Rui Huo,Shun Wang,Jichang Wang
Urchin-shaped Bi2S3/Cu2S/Cu3BiS3 nanocomposites were successfully prepared in this study through one-pot synthesis, which involved microwave-assisted simultaneous pyrolysis of two precursors. The as-prepared Bi2S3/Cu2S/Cu3BiS3 hybrids exhibit stronger absorption in the near-infrared regime than the individual components, i.e., Bi2S3, Cu2S, and Cu3BiS3. The photothermal conversion efficiency (η) of Bi2S3/Cu2S/Cu3BiS3 composites can even reach 43.8%, which is significantly higher than that seen with most of the transition metal chalcogenide materials. The excellent photothermal performance of Bi2S3/Cu2S/Cu3BiS3 hybrids is likely arising from its unique urchin-like structure, in which needle-like Bi2S3/Cu2S nanocomposites grow from the core of Cu3BiS3. The copresence of Bi2S3 and Cu2S also leads this newly synthesized composite to produce high contrast for X-ray computer tomography imaging, an important property required for a great potential application in theranostic cancer treatment.
研究领域:
材料科学
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医学影像
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肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 15
·7161-7168
·
IF 7.79
Guotao Xiang,Qing Xia,Xiaotong Liu,Yongjie Wang,Sha Jiang,Li Li,Xianju Zhou,Li Ma,Xiaojun Wang,Jiahua Zhang
Highly effective photothermal conversion performance coupled with high resolution temperature detection in real time is urgently needed for photothermal therapy (PTT). Herein, ultra-small Cu2S nanoparticles (NPs) were designed to absorb on the surface of NaScF4: Yb3+/Er3+/Mn2+@NaScF4@SiO2 NPs to form a central-satellite system, in which the Cu2S NPs play the role of providing significant light-to-heat conversion ability and the Er3+ ions in the NaScF4: Yb3+/Er3+/Mn2+ cores act as a thermometric probe based on the fluorescence intensity ratio (FIR) technology operating in the biological windows. A wavelength of 915 nm is used instead of the conventional 980 nm excitation wavelength to eliminate the laser induced overheating effect for the bio-tissues, by which Yb3+ can also be effectively excited. The temperature resolution of the FIR-based optical thermometer is determined to be better than 0.08 K over the biophysical temperature range with a minimal value of 0.06 K at 298 K, perfectly satisfying the requirements of biomedicine. Under the radiation of 915 nm light, the Cu2S NPs exhibit remarkable light-to-heat conversion capacity, which is proved by photothermal ablation testing of E. coli. The results reveal the enormous potential of the present NPs for PTT integrated with real-time temperature sensing with high resolution.
研究领域:
生物医学工程
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纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemCatChem
·
2018
·Vol. 11
·期 4
·1354-1361
·
IF 4.674
Xianming Wang,Jianzhi Wang,Xiaoxiao Zhang,Qifeng Tian,Manyu Liu,Ning Cai,Yanan Xue,Weimin Chen,Wei Li,Faquan Yu
Graphical His and HER : Nitrogen doped Cu 2 S/MoS 2 heterojunction nanorod arrays grafted on copper foam in situ have been created for efficient hydrogen evolution reaction. The results showed the remarkably improved catalytic activity by designing and tuning the heterostructure, conductivity and active sites. The fabrication of non-noble element electrocatalysts with comparable catalytic activity with Pt-based materials is in great requirements for water splitting to achieve sustainable hydrogen production. Cu 2 S/MoS 2 heterojunction nanorod arrays on copper foam were prepared for this purpose. The nitrogen doping was achieved in situ. HRTEM, SEM, XPS and EDX verified the heterojunction interfacial texture and the defect-rich nanoarray configuration. The heterojunction interfacial texture, the defect rich configuration and the outward active sites optimized the structure required as a high-efficient hydrogen evolution reaction (HER) electrocatalyst. As a result, the charge transfer resistance of the nanoarrays was estimated to be 5.4 Ω at −200 mV versus RHE, even lower than both the precursors. The electrochemical double layer capacitance was 49.95 mF cm −2 , which was higher than both the precursors. The Cu 2 S/MoS 2 heterojunction nanoarrays-like electrocatalyst exhibited significant performance with a low overpotential (91 mV at 10 mA cm −2 ) and a small Tafel slope (41 mV dec −1 ) in alkaline electrolyte with 85.3 % retained ability after 1000 cycle runs. This work paves a road for developing high-performance HER electrocatalysts.
研究领域:
材料科学
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电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jin Wu,Yunlong Chen,Xianzhi Hu,Futing Zi,Yue Lin,Yufang Li
Developing an efficient and cleaner technology to recover gold (III) from aqueous media is vital for both economic and environmental perspectives. Herein, Cu 2 S was first found with well Au (III) recovery ability. Rod and flower-like Cu 2 S nanoparticles prepared by dynamic modulation, with jaggy micro-surface and relatively hard-wearing shape, was found with well Au (III) affinity. Results proved that this adsorbent could work better over a relatively wide pH from 2 to 5, and temperature from 25 to 55 °C, and that attained high gold capacity of 5,582 mg/g which obviously exceeded other reported adsorbents, indicating well application potential. XRD, TEM, and XPS studies demonstrated that adsorbed Au (III) was reduced as Au (0) by Cu 2 S. DFT studies verified that Au (III) recovery is related with the formation of “Cu-S-Au” bridge-like linkage and the unceasingly produced new adsorption sites after adsorbed Au atom’s migration and agglomeration. Au (III) recovery ability and selectivity in the actual sample was proved to be well too. Also, more than 90% gold on Cu 2 S could be recovered with HNO 3 . This study is of great theoretical and practical significance for cleaner Au (III) recovery from various aqueous media.
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
SOLID-STATE ELECTRONICS
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2016
·
IF 1.345
Xu Li,Yue Lu,Li Guan,Jiantao Li,Yichao Wang,Guoyi Dong,Aiwei Tang,Feng Teng
Hybrid organic/inorganic electrically bistable devices (EBDs) based on Cu 2 S/PVK nanocomposites have been fabricated by using a simple spin-coating method. An obvious electrical bistability is observed in the current-voltage ( I - V ) characteristics of the devices, and the presence of the buffer layer and the annealing process have an important effect on the enhancement of the ON/OFF current ratios. Different electrical conduction mechanisms are responsible for the charge switching of the devices in the presence and absence of the buffer layer.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Jia-Yi Zhang,Si-Ting Liu,Zhen-Long Dou,Cong-Cong Zhang,Guo-Wei Li,Si-Jing Ding,Li Zhou,Qu-Quan Wang
Hybridization is an effective strategy to obtain complementary and synergistic properties from each component. This study describes an intriguing approach for the synthesis of rod-shaped Cu2S/AgPtSe2–Au hybrids with improved photothermal capabilities. The synthesis protocol involves a silver-mediated method for depositing the topological semimetals of PtSe2 onto the surface of Au nanorods, followed by wrapping a layer of Cu2S with high carrier concentration and mobility. The formed heterojunctions exhibit enhanced light absorption properties and accelerated charge separation of photoexcited carriers. Under excitation of a near-infrared 1064 nm laser, the hybridized Cu2S/AgPtSe2–Au shows enhanced photothermal conversion, with a 2.5-time temperature increase (ΔT) than that of bare Au nanorods.
研究领域:
材料科学
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纳米技术
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xu Zhang,Lianfeng Duan,Xueyu Zhang,Xuesong Li,Wei Lü
Cu 2 S has attracted great attention as anode material of lithium ion battery due to high theoretical capacity and good electron conductivity. However, the poor cyclic stability due to volume change during charging and discharging restrains its further application. Herein, to improve stability of Cu 2 S, 3D matrix composed of reduced graphene oxide (rGO) scaffold and Cu 2 S nanoflowers are synthesized by hydrothermal method and freeze-drying process. The 3D matrix structure could relieve the structural and morphological variation of nanoparticles during charge and discharge processes, and rGO as bridge increases the effective area that is simultaneously accessible to electrons and lithium ions to improve the specific capacity of Cu 2 S nanoflowers. Thus, excellent capacity, stable cycle life and preferable rate capability could be simultaneously realized. The 3D Cu 2 S@rGO composite electrodes show the specific capacity of 1630 mAh g −1 for the first cycle and a reversible capacity of 600 mAh g −1 after 200 cycles at 100 mAh g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yajuan Li,Qiongfang Wang,Xin Zhang,Lei Dong,Min Zhang,Pinhua Rao,Naiyun Gao,Yangang Sun,Jing Deng
This work successfully synthesized magnetic FeWO 4 /Cu 2 S through a facile method with efficient peroxymonosulfate (PMS) activation to eliminate sulfachloropyridazine (SCP) in water, in which 97.56% of SCP was removed in 30 min with activating only 0.2 mM PMS . Factors such as calcination temperature, the addition amount of WS 2 in FeWO 4 /Cu 2 S, molar ratio of Cu/Fe in FeWO 4 /Cu 2 S, catalyst dosage, solution pH, inorganic anions and natural organic matters（NOM）were investigated. It was found that in FeWO 4 /Cu 2 S at 1:2 possessed the best catalytic performance for PMS. FeWO 4 /Cu 2 S performed well in a wide pH range (3–9) and the effect was better under acidic conditions. A high catalyst dosage could supply more catalytic active sites for PMS activation and encourage the production of reactive oxygen species . Anions (HCO 3 − and HPO 4 2− ) and NOM significantly inhibited SCP degradation, whereas Cl − had only a tiny inhibitory impact. In addition, H 2 PO 4 − and NO 3 − demonstrated duality in the degradation of SCP. The oxidation process was dominated by non free radical oxidation by 1 O 2 rather than free radicals oxidation by HO⋅ and SO 4 •− . Three SCP degradation pathways—SO 2 extrusion, S-N bond cleavage and hydroxylation were proposed according to intermediate products analysis. The mechanism was found that the introduction of W improved the dual metals cycles of Fe 3+ /Fe 2+ and Cu + /Cu 2+ which could efficiently promote PMS activation. In addition, the magnetic FeWO 4 /Cu 2 S was easy to separate after reaction, which had great application potential in the water treatment .
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Ya Zhang,Lang Hu,Yongcai Zhang,Xiaozhi Wang,Honggui Wang
Snowflake-like Cu 2 S/MoS 2 heterostructures with varied compositions were constructed via a two-step hydrothermal method. The 45-Cu 2 S/MoS 2 with 45 wt% Cu 2 S was found as the optimum catalyst, which displayed photothermal enhanced hydrogen evolution reaction (HER) performance under near infrared (NIR) irradiation. After electrochemical deposition of a tiny amount of Pt (45-Cu 2 S/MoS 2 /Pt-100s), Schottky barrier was formed between Pt nanoparticles and MoS 2 nanosheets . Using 45-Cu 2 S/MoS 2 /Pt-100s as an electrocatalyst, low overpotential of 78 mV (@10 mV cm −2 ) and Tafel slope of 48 mV dec −1 were achieved with the assistance of NIR irradiation. The photoelectrochemical (PEC) hydrogen production performance of 45-Cu 2 S/MoS 2 /Pt-100s was also investigated. The optimal conversion efficiency of 45-Cu 2 S/MoS 2 /Pt-100s could reach 0.78% at 0.57 V (vs. reversible hydrogen electrode (RHE)). The control of the internal geometric and electronic structure of the catalysts and the aid of photothermal effect in this work provide new ideas for designing high-efficiency hydrogen evolution catalysts.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Lin Tang,Yaocheng Deng,Guangming Zeng,Wei Hu,Jiajia Wang,Yaoyu Zhou,Jingjing Wang,Jing Tang,Wei Fang
This paper described a facile method for the design and utilization of three-dimensional TiO 2 branched nanorod arrays with CdS and Cu 2 S quantum dots co-sensitized photoelectrode for photoelectrochemical water splitting . CdS and Cu 2 S quantum dots were attached on the surface of TiO 2 BNRs by successive ionic layer adsorption and reaction (SILAR). The morphology and element composition of the fabricated samples were characterized by field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and the optical features were measured by UV–vis diffuse reflection spectroscopy (UV–vis DRS) and photocurrent density–voltage (I–V) curves. The photocurrent value can be significantly enhanced due to the introduction of CdS and Cu 2 S quantum dots on the TiO 2 BNRs surface. The 9 cycles of CdS and 6 cycles of Cu 2 S presented the best performance and reached a high photocurrent density to 13.65 mA at 0 V versus Ag/AgCl and hydrogen generation efficiency of 7.74% at −0.467 V versus Ag/AgCl. This enhancement can be attributed to the improved light absorption and the heterojunction formed between CdS and Cu 2 S, which can greatly promote the introduction and transportation of the photo electrons. This work provided a facile way for the synthesis of high performance photoelectrode for photoelectrochemical water splitting.
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zeshuang Kong,Ruiqi Zhang,Jixian Dong,Jiahui Yu,Dafeng Zhang,Junchang Liu,Peiqing Cai,Xipeng Pu
With the increasing needs of people for a better life, the problem of water resources pollution has attracted wide attention. The construction of p-n heterojunction is an effective strategy to promote the removal of pollutants by photocatalysts. In this work, a series of BiOBr/Cu 2 S heterojunction photocatalysts with mass ratios of Cu 2 S have been synthesized successfully by a hydrothermal method combined with grinding method for photocatalytic degradation of tetracycline (TC) and ciprofloxacin (CIP). The results showed that BiOBr/Cu 2 S exhibited superior photodegradation efficiency of TC and ciprofloxacin CIP than BiOBr and Cu 2 S monomers. When the mass ratio of Cu 2 S is 0.15 %, the visible degradation of CIP and TC are 79.2 % in 90 min and 88.5% in 60 min. In addition, the effects of different inorganic ions and pH value on the photocatalytic performance of BiOBr/Cu 2 S were investigated. It was proved that superoxide free radical (•O 2 - ) was the main active species by free radical trapping experiment. The photocatalytic degradation process was further evaluated by total organic carbon and mass spectrometry tests. This work provides a feasible construction strategy for photocatalysts with potential application in water resources pollutants.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Pengli Si,Xinxin Wang,Yajing Wang,Guangmeng You,Xueke Gu,Zheng Jiang,Jingdan Lei,Chao Wang
N-type PbSe-based materials have emerged as a research focus in medium-to-high temperature thermoelectric applications due to their high carrier mobility, stability across wide temperature ranges, and cost-effectiveness. However, simultaneously maintaining high carrier mobility while reducing lattice thermal conductivity remains a critical challenge for PbSe-based materials. Research demonstrates that constructing coherent interfaces optimizes charge carrier scattering, thereby maintaining high carrier mobility while achieving thermal conductivity reduction. In this work, after Cu 2 S alloying treatment, coherent nanostructured precipitates consisting of Cu 2 S (monoclinic phase) and PbS (cubic phase) are formed at grain boundaries. The lattice mismatch at the interface is maintained below 4.5%, which consequently leads to only a marginal reduction in charge carrier mobility. Meanwhile, Cu 2 S, as a dynamic electron donor, increases the carrier concentration. Additionally, the diffusion of Cu + ions introduces lattice disorder, which, in combination with the low- to mid-frequency phonon scattering from the nano-precipitates, significantly reduces the lattice thermal conductivity. As a result, a ZT value of 1.53 is achieved at 773 K. The Pb 1.02 Se-0.5% Cu 2 S composite prepared in this study exhibits superior thermoelectric performance compared to most n-type PbSe-based materials, demonstrating that the introduction of coherent nanostructures constitutes an effective strategy for enhancing the thermoelectric properties of n-type PbSe.
研究领域:
材料科学
·
热电材料
·
凝聚态物理
·
半导体材料
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）