JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2025
·
IF 4.8
Xuefeng Zhang,Xuli Bai,Xiaofei Liu,Dan Wang,Hong Han,Zhengguo Xiao,Jianguo Zhang,Zhongquan Nie
We report the broadband optical nonlinearities and ultrafast carrier dynamics of GO doped with CuS nanoparticles (GO-CuS) following the femtosecond pulse lasers. Both the pure GO and GO-CuS hybrid films are first synthesized by the vacuum filter deposition method and their optical nonlinearities are then examined in the wide wavelength range (400 nm-1064 nm) based on the femtosecond Z-scan technique. The results reveal that, compared to the pristine GO, the introduction of CuS not only makes the GO-CuS hybrid film switched from saturated absorption to reverse saturated absorption possible, but also achieves strong broadband optical nonlinear absorption responses and optical limiting effects. It is demonstrated that the strongest nonlinear absorption coefficient (∼3.6×10-7 m/W) appears at 400 nm excitation, which is dozens of times larger than that under the illumination of 1064 nm. By leveraging the femtosecond pump-probe technique, we further study the ultrafast carrier dynamics of the GO-CuS hybrid film carrying the fast and slow relaxation processes. Moreover, the physical mechanisms behind these excellent nonlinear optical responses are elucidated. The findings presented here indicate that the GO-CuS hybrid film can be regarded as a potential promising candidate in various ultrafast photonics devices.
研究领域:
光学
·
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shudi Mo,Yunhua Song,Meihong Lin,Jianling Wang,Ze Zhang,Jingyu Sun,Donggang Guo,Lu Liu
Defect engineering has been proven to be an effective approach for electronic structure modulation and plays an important role in the photocatalytic performance of nanomaterials. In this study, a series of CuS nanosheet sulfur vacancies ( V S ) are constructed by a simple hydrothermal synthesis method. The CuS with the highest V S concentration exhibits strong antibacterial performance, achieving bactericidal rates of 99.9% against the Gram-positive Bacillus subtilis and Gram-negative Escherichia coli bacteria under 808 nm laser irradiation. Under illumination, the temperature of the catalyst increases from 23.5 °C to 53.3 °C, and with a high photothermal conversion efficiency of 41.8%. For E. coli and B. subtilis , the reactive oxygen species (ROS) production that is induced by the CuS group is 8.6 and 9.6 times greater, respectively, than that of the control group. The presence of V S facilitates the enhancement of the light absorption capacity and the separation efficiency of electron-hole pairs, thereby resulting in improved photocatalytic performance. The synergistic effect of photothermal therapy (PTT) and photodynamic therapy (PDT) is aimed at causing oxidative damage and leading to bacterial death. Our findings provide an effective antibacterial strategy and offer new horizons for the application of CuS catalysts with V S in the NIR region.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 37
·2301762
·
IF 13.3
Jiamin Zhu,Shengjie Zi,Nan Zhang,Yang Hu,Li An,Pinxian Xi
Oxygen evolution reaction (OER) is one of the important half-reactions in energy conversion equipment such as water-spitting devices, rechargeable metal-air batteries, and so on. It is beneficial to develop efficient and low-cost catalysts that understand the reaction mechanism of OER and analyze the reconstruction phenomenon of transition metal sulfide. Interestingly, copper sulfide and cuprous sulfide with the same components possess different reconstruction behaviors due to their different metal ion valence states and different atomic arrangement modes. Because of a unique atomic arrangement sequence and certain cationic defects, the reconstruction phenomenon of CuS nanomaterials are that S 2− is firstly oxidized to SO 4 2− and then Cu x + is converted into CuO via Cu(OH) 2 . In addition, the specific “modified hourglass structure” of CuS with excellent conductivity is easier to produce intermediates. Compared with Cu 2 S, CuS exhibits excellent OER activity with a lower overpotential of 192 mV at 10 mA cm −2 and remarkable electrochemical stability in 1.0 m KOH for 120 h. Herein, this study elucidates the reconstruction modes of CuS and Cu 2 S in the OER process and reveals that CuS has a stronger Cu S bond and a faster electronic transmission efficiency due to “modified hourglass structure,” resulting in faster reconstruction of CuS than Cu 2 S.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Yanan Deng,Yuanyuan Shen,Yao Du,Takashi Goto,Jianfeng Zhang
The development of high-performance electrode materials with a far-from-enough energy density has still been crucial for the real applications of supercapacitor technology. In this paper, the N-doped and derivatized-carbon-intercalated Ti 3 C 2 T x , abbreviated as N–Ti 3 C 2 T x /C, was firstly fabricated using ZIF-67 as an intermediate precursor. Then N–Ti 3 C 2 T x /C/CuS was prepared by further intercalation with CuS nanoparticles through a room-temperature-in-situ-reaction route. The doped pyridine N and pyrrolic N, together with derivatized carbon, optimized the surface charge distribution of Ti 3 C 2 T x with increased active sites. In addition, CuS nanoparticles were observed distributed on the surface and between layers of single/multi-layered two-dimensional N–Ti 3 C 2 T x /C nanosheets, forming a heterogeneous three-dimensional structure. Therefore, the specific capacitance of the N–Ti 3 C 2 T x /C/CuS composite at a current density of 1 A g −1 reached 1205.8 F g −1 , about 5 times that of N–Ti 3 C 2 T x /C and 2 times of CuS, also much higher than other composite reported in the literature. The energy density and power density of N–Ti 3 C 2 T x /C/CuS, as a symmetric supercapacitor electrode, are 77.22 Wh·kg −1 and 649.54 W kg −1 , respectively. More importantly, N–Ti 3 C 2 T x /C/CuS has an excellent stability after 3000 cycles, surpassing that of similar electrode materials reported in literature. This study opens a new direction for enhancing the energy density of supercapacitors with modified electrode materials through a MOF-mediated strategy.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Xin Chen,Rong Chen,Xun Zhu,Qiang Liao,Yuxin Zhang,Dingding Ye,Biao Zhang,Youxu Yu,Jinwang Li
In this work, a solar responsive photocathode with the CuS/Cu 2 O/Cu cubic nanoparticles was developed to facilitate the separation of the electron/hole pairs so as to enhance the photoelectrochemical activity. The EIS and LSV results indicated the developed CuS/Cu 2 O/Cu photocathode showed better photoelectrochemical activity toward the oxygen reduction reaction than the Cu 2 O/Cu photocathode. Good stability of the developed CuS/Cu 2 O/Cu photocathode was confirmed by the photocurrent vs time measurement. Besides, the developed CuS/Cu 2 O/Cu photocathode was also assessed by incorporating it into a photocatalytic fuel cell with the lateral design for simultaneous wastewater treatment and electricity generation. It was shown that higher cell performance was achieved than the Cu 2 O/Cu photocathode. The performance of the photocatalytic fuel cell with the developed photocathode was then studied under various operating conditions. Experimental results indicated that increasing the light intensity and the Na 2 SO 4 electrolyte concentration and decreasing the liquid flow rate in the testing range could improve the cell performance. This study provides a new photocathode design for the photocatalytic fuel cell applications and other photoelectrochemical systems.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 25
·14670-14678
·
IF 3.119
Yang Yang,Junting Liang,Wenwen Jin,Yingyue Li,Menghui Xuan,Shijie Wang,Xiaoqian Sun,Chuanliang Chen,Jianhua Zhang
In this study, the CuS/BiVO4-X (where X represents the mass percentage of CuS associated with CuS/BiVO4; X = 2%, 5% and 7%) p–n heterostructures were fabricated using a two-step hydrothermal method. The structural and morphological features were ascertained in great detail using several physical characterization processes. According to the results of the photoelectrochemical (PEC) experimental processes, the PEC properties of CuS/BiVO4-5% were much more obvious as compared to those of pure BiVO4, CuS and CuS/BiVO4-X. Moreover, the photoluminescence (PL) and UV-vis diffuse reflection spectra (DRS) affirmed that the CuS/BiVO4-5% demonstrates an excellent capacity for absorbing visible light and low electron recombination rate as compared with the other composites. Accordingly, PEC sensors with CuS/BiVO4-5% were fabricated for the detection of dopamine (DA) and bisphenol A (BPA) with outstanding selectivity and stability. For DA, it implied a broad linear range from 0.01–10 μM and 10–120 μM, and for BPA, the broad linear range was 0.01–90 μM. Thus, the PEC sensor has significant potential application when it comes to DA and BPA detection.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jia-Yi Shi,Zhen-Long Wang,Ke-An Wang,Hai-Bin Zhu
The electrochemical reduction of carbon dioxide into energy-carrying compounds or value-added chemicals is of great significance for diminishing the greenhouse effect. However, it is still imperative to replace the less-value anodic oxygen evolution reaction (OER) to improve the technical economy. Herein, we firstly reported a bifunctional CuS/TiO 2 catalyst for both anodic methanol oxidation reaction (MOR) and cathodic carbon dioxide reduction (CO 2 R). The in-built abundant CuS/TiO 2 heterointerfaces are found to boost the CO 2 R and MOR to produce formate. Based on the unique bifunctionality of CuS/TiO 2 , a paired electrosynthesis of formate was performed with a total Faradaic efficiency (FE) of about 170 %, in which the cathodic CO 2 R achieved a formate FE of about 70 %, and the anodic MOR exhibited an almost 100 % formate FE.
研究领域:
化学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Shixiong Zhai,Kaili Jin,Man Zhou,Zhuizhui Fan,Hong Zhao,Xiaoyan Li,Yaping Zhao,Fengyan Ge,Zaisheng Cai
In this work, a novel flexible electrode composed of porous carbonized cotton, ZnO nanoparticles and CuS micro-spheres is prepared by two-step method. Benefitting from the synergistic effect of eletrochemical double layer capacitance and pseudo capacitance, the porous carbonized cotton/ ZnO/CuS composite (pCcZC) electrode shows excellent specific capacitance (1830 mF cm −2 at 2 mA cm −2 ), high rate performance (74% retention with the current density increasing from 2 to 10 mA cm −2 ) and outstanding cycle stability (14.8% loss of initial capacitance after 5000 cycles). The flexible and lightweight carbonized cotton as current collector directly makes the electrode binder-free, flexible and wearable. Additionally, the flexible symmetrical supercapacitor based on pCcZC electrodes achieves a superior energy density of 0.27 Wh cm −2 at 4.26 W cm −2 , and can succesfully light the LED, which manifests its great applied potential in the new generation of portable and wearable energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 113
·93226-93233
·
IF 3.84
Lei Zhang,Yecheng Li,Zexun Jin,King Ming Chan,Jimmy C. Yu
Spurred by the recent development in nanotechnology, multi-functional therapeutic platforms have emerged as promising anti-cancer treatments for their combinational effects. In this paper, we report a novel drug delivery system composed of mesoporous carbon nanospheres (MCN) of 150 to 200 nm in diameter capped with copper sulfide (CuS) nanoparticles (NPs). MCNs can efficiently load doxorubicin (DOX, an anti-cancer drug) due to their hollow and porous structures as well as the π–π stacking interactions between MCN and DOX. DOX is retained in MCN under a basic and physiological environment, but releases rapidly under an acidic environment in its ionized state. Due to the intrinsic near-infrared (NIR) absorption and photothermal conversion ability of copper sulfide nanoparticles, heat is generated for killing tumor cells as well as stimulating DOX release upon NIR irradiation. Thus, this complex (MCN–CuS) exhibits efficient drug loading, low pre-release, temperature-, NIR- and pH-responsive DOX release, and combined antitumor activity.
研究领域:
纳米医学
·
肿瘤学
·
药剂学
✓ 已验证
DOI
高影响因子
Environmental Science-Advances
·
2023
·Vol. 2
·期 3
·495-507
·
IF 0
Yong Cheng,Lin Deng,Dan Wang,Xiuxiu Wang,Changchun Ji,Ying-Hua Zhou
In this work, CuS@Cu-CD composites were synthesized and employed as Fenton-like catalysts. CuS significantly enhanced the photodegradation activity of tetracycline (TC) when decorated with Cu-doped-carbon dots (Cu-CDs). The influence of initial pH, dosage of catalyst, and H2O2 concentration on the catalyst performance was investigated. Radical trapping experiments proved that ·O2− and h+ played critical roles and ·OH played a moderate role in the degradation of TC. Mechanism analyses demonstrated that Cu2+/Cu+ redox circulation could be accelerated by the introduction of Cu into carbon dots, which further facilitated H2O2 consumption and resulted in higher TC degradation efficiency.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
CHEMOSPHERE
·
2022
·
IF 8.943
Fang Zhu,Huiqi Wu,He Zhang,Sridhar Komarneni,Jianfeng Ma
Here in, a special catalytic system of potassium persulfate (K 2 S 2 O 8 , PS) activated by Bi 2 MoO 6 –CuS composite was established for the orange II (OII) degradation under visible light. The Bi 2 MoO 6 –CuS composite was synthesized by a two-step hydrothermal and solvothermal methods. The structure, morphology, light absorption and photocatalytic properties of the composite were respectively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible diffuse reflectance spectroscopy (UV–vis DRS). The removal efficiency of OII degradation in the Bi 2 MoO 6 –CuS/PS/vis system reached to 98% within 80 min, which was much higher than that of either Bi 2 MoO 6 or CuS alone. A feasible mechanism analysis of OII degradation was proposed and validated by simple classical quenching experiments and electron spin resonance (ESR) spectroscopy. The high removal efficiency by the nanocomposite could be attributed to highly active species of O 2 ·- , ·OH and SO 4 •− radicals in the Bi 2 MoO 6 –CuS photocatalytic oxidation system. Moreover, the composite material retained its activation performance even after 5 degradation cycles, which suggested its high stability.
研究领域:
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenjing Yang,Yibing Ji,Chenhang Ding,Xujie Zhang,Wurikaixi Aiyiti,Chongxian He,Cijun Shuai
Reactive oxygen species (ROS) mediated tumor therapeutic strategies have been extensively studied. However, its effectiveness in eliminating tumor cells is inevitably restricted by the hypoxia or the insufficient hydrogen peroxide (H 2 O 2 ) content. To fundamentally address these challenges, an O 2 -independent and stimuli-responsive nanosystem (named CuS@PMS) is ingeniously constructed by loading peroxymonosulfate (PMS: HSO 5 − ) into hollow mesoporous copper sulfide (CuS) to mediate the generation of sulfate radicals (SO 4 − ). The CuS@PMS was then introduced into polycaprolactone (PCL) to prepare into breast meshes by selective laser sintering. Specifically, the released Cu 2+ ions combining with the photothermal property of CuS synergistically activate PMS, ensuring the cascade amplification of SO 4 − . Unlike conventional ROS, the production of SO 4 − independent on the content of O 2 and H 2 O 2 in the tumor microenvironment, characterizing a longer half-life and faster reaction rate, thereby possessing more advantages in antitumor. The results showed that the SO 4 − yield of PCL/CuS@PMS group significantly higher than that of PCL/PMS group, especially under near-infrared (NIR) light. Moreover, the antitumor efficiency of PCL/CuS@PMS + NIR group was 43 % higher than that of PCL/PMS group in an O 2 -independent manner. The study provided a more efficient, highly adaptable and versatile approach for tumor treatment.
研究领域:
生物医学工程
·
纳米技术
·
肿瘤治疗
✓ 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）