BIOMATERIALS
·
2021
·
IF 12.479
Jichun Yang,Shuojiong Pan,Shiqian Gao,Tianyu Li,Huaping Xu
Carbon monoxide (CO) therapy and antiangiogenesis therapy (AAT) are regarded as promising approaches for cancer treatment. However, the poor tumor targeting ability and inevitable side effects prevent their clinical application. In this study, we developed H 2 O 2 -responsive diselenide-containing micelles that combined CO therapy with chemosensitization therapy and AAT in a single system. Under the interaction of intratumoral H 2 O 2 , CO and gemcitabine (GEM) were released in situ from the micelles to reduce side effects, and CO significantly sensitized the chemotherapeutic effect of GEM by elevating the level of reactive oxygen species (ROS) in human gastric cancer AGS cells. Furthermore, diselenide bonds in the micelles were oxidized to seleninic acid in organic form, which suppressed the expressions of vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) to realize AAT. This study provides an integrated solution to combine CO therapy with chemosensitization therapy and AAT together with good biocompatibility .
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PubMed
高影响因子
INORGANIC CHEMISTRY
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2021
·
IF 5.165
Yi-Xin Zhang,Yun-Qiao Tang,Zheng Ma,Ming-Yu Hu,Jing Feng,Zhen-Hua Ge
In this study, Cu2Se1–xSx (x = 0.1, 0.3, and 0.5) alloy powders were prepared by the hydrothermal synthesis method. In the subsequent sintering process, the spontaneous in situ phase separation process of the sample forms a two-phase hybrid structure. The generated Cu2S precipitates in the Cu2Se matrix noticeably enhance phonon scattering, which is beneficial for low thermal conductivity without significantly affecting the electrical transport performance. Ultimately, an optimized thermoelectric performance was obtained in Cu2Se0.9S0.1, reaching a peak zT value of 1.43 at 773 K, the optimum value among the Cu–Se–S systems at this temperature.
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PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2021
·
IF 7.267
Hai-Qin Xiao,Wen-Hui Zhou,Dong-Xing Kou,Zheng-Ji Zhou,Yue-Na Meng,Ya-Fang Qi,Sheng-Jie Yuan,Li-Tao Han,Zhi Zheng,Si-Xin Wu
Se-rich selenization offers remarkable benefits for grain growth of Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber layers , which is critical for solar cells fabrication. However, low-activity selenium often forms Se-clusters and trapped in CZTSSe absorber layers. These trapped Se-clusters increase carrier recombination in CZTSSe absorber layers, thus decreasing efficiency of CZTSSe solar cells. Herein, supercritical carbon dioxide (SCCO 2 ) treatment was demonstrated to regulate selenium composition of CZTSSe absorber layers for solar cells efficiency improvement. Compared with untreated CZTSSe absorber layers, selenium composition of CZTSSe absorber layers were significantly reduced by SCCO 2 treatment. The open circuit voltage ( V OC ) and fill factor (FF) of CZTSSe solar cells improved pronouncedly due to carrier recombination reduction and carrier transport enhancement. As a consequence, the power conversion efficiency (PCE) was increased from 9.26 % (ref device) to 11.43 % (SCCO 2 device). This unique SCCO 2 treatment may offer new ideas for other selenization-based optoelectronic devices performance improvement.
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高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Youqiang Huang,Yingjie Zhao,Yuan Liu,Beibei Xu,Shiqing Xu,Gongxun Bai
At present, the shortage of potable water is still a critical issue. The emerging of solar-driven evaporation technique offers a promising way to solve freshwater scarcity. However, developing highly efficient evaporation system is still a challenge. Herein, this work developed two-dimensional heterostructure nanosheets as the photothermal agent. We used the WSe 2 nanosheets to enhance the absorption of graphene and facilitate the heat localization due to its higher visible light absorption and ultralow thermal conductivity. And graphene provided the low surface reflection and a broad absorption spectrum. Moreover, the enhanced near infrared photothermal conversion of the heterostructure nanosheets is realized to be 41.4% higher than some previous works by introducing lanthanide ions. A series of experiments are performed to determine its heterostructure. Besides, the interfacial evaporation system has been constructed based on as-prepared nanosheets, exhibiting excellent solar-to-heat efficiency of 91.8% and water evaporation rate of 1.672 kg m −2 h −1 under stimulated 1 sun irradiation. It is suggested that developed nanosheets have the potential application for highly effective solar-driven evaporation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Lin Wang,Qingqing Jiang,Kun Yang,Yifan Sun,Tengfei Zhou,Zhengxi Huang,Hai-Jian Yang,Juncheng Hu
Potassium-ion batteries (PIBs) is increasingly studied because of their suitable redox potential and high natural abundance. However, potential anode materials with long-term cycling stability are still in high demand because of the large radius of K + . Herein, an MOF-derived hierarchical carbon structure and the self-assembly of CNTs on hollow carbon polyhedrons are used as carbon matrices to disperse and stabilize metal selenides(Co-Se@CNNCP). When the hybrid is utilized in PIBs, it displays a specific capacity of 410 mA h g −1 at 0.1 A g −1 after 80 cycles and 253 mA h g −1 at 0.5 A g −1 after 200 cycles with a capacity retention of 100%, while the metal selenides dispersed on hollow carbon polyhedrons without CNTs (Zn-Co-Se@NCP) lose 86% of their capacity after 200 cycles. The superior cycling stability of the hybrid is mainly attributed to the large amounts of CNTs suppressing the agglomeration of the metal selenide nanoparticles on the surface, and the hollow carbon polyhedrons cause a high structural integrity during the repreated K + insertion and extraction process. This work offers a feasible route to design a hierarchical carbon matrix for use as the anode materials of PIBs with long-term cycling stability.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiaogong Lv,Chengjun Zhu,Yiming Wang,Lei Wang,Jianming Shi
Kesterite Cu 2 Zn 1- x Cd x Sn(S,Se) 4 (CZCTSSe) alloy thin films were fabricated by the water-based solution approach. The influence of Cd doping on the morphology, phase structure, element valence states, optical, electrical, and device performance were comprehensively examined. Cd was clearly alloyed into the Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber layer to form the CZCTSSe compound. By controlling the relative Cd content, band gap values ( E g ) of the CZCTSSe thin films were engineered between 1.10 eV and 1.21 eV. In addition, doping with Cd led to the enhancement of grain growth as well as improvement of the conductivity and photoelectric property of the absorber layer. In particular, the CZCTSSe ( x = 0.4) absorber layer exhibited a pure phase, larger grain size, compact and uniform topography, suitable band gap, Cu-poor and (Cd+Zn)-rich composition, higher conductivity and better photoelectric response. Power conversion efficiency (PCE) is improved from 4.37% of the CZCTSSe ( x = 0.0) device to 5.16% of CZCTSSe ( x = 0.4) device, and the increases of short-circuit current ( J sc ) achieved to 8.94 mA/cm 2 . The encouraging results suggest that doping of Cd is an effective way to improve CZTSSe film properties and promote device efficiency.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiaxing Wen,Yi Pei,Li Liu,Die Su,Min Yang,Qianfu Wang,Wen Zhang,Jing Dai,Yan Feng,Tianjing Wu,Xianyou Wang
Both antimony selenide and antimony are promising anode materials for lithium-ion batteries. However, owing to the influence of the poor electronic conductivity of Sb 2 Se 3 and the large volume expansion of the two materials during the lithiation process, their electrochemical performance is limited and the practical application is restricted. In this work, for the first time, the hierarchical Sb 2 Se 3 and Sb particles fully encapsulated into carbon nanofibers (Sb 2 Se 3 /Sb/C nanofibers) have been in-situ synthesized by electrospinning followed by controlled annealing. Combining the advantages of high specific capacity of Sb 2 Se 3 , good electronic conductivities of Sb and C, and strong stability of C matrix, the Sb 2 Se 3 /Sb/C nanofibers electrode shows excellent lithium-storage performance. It achieves a high reversible capacity (764 mA h g −1 after 300 cycles at 0.1 A g −1 ), splendid ultralong cycling stability (429 mA h g −1 after 1000 cycles at 1 A g −1 ), and high rate capability (342 mA h g −1 at 5 A g −1 ). It demonstrates that Sb 2 Se 3 /Sb/C nanofibers are promising high-performance anode materials for lithium-ion batteries.
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高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Junye Tong,Shaotong Wang,Gang Wang,Yue Liu,Yuxiang Wang,Liping Chen,Lingling Wang,Daocheng Pan,Xintong Zhang,Yichun Liu
Ion doping strategy is a promising method to enhance the efficiency of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells, however, most of the reported works focus on studying the single ion doping in CZTSSe absorber layers . Here, Li + &Ag + and Li + &Cd 2+ double-ion-doping strategy are applied to improve the microstructure and device performances. We found that the double-ion-doping strategy can obviously increase the grain size, reduce the thickness of fine-grain layers and enhance the device performances. Furthermore, the PCEs of Li + &Ag + and Li + &Cd 2+ doped CZTSSe solar cells are up to 8.87% and 8.39%, respectively. It shows an encouraging improvement of over 43.5% and 35.8% enhancement compared with the traditional method (6.18%), and significantly higher than single ion doping strategy (7.60%, 7.99% and 7.11% for Li + , Ag + , and Cd 2+ doped CZTSSe solar cells). This work provides a new solution to improve the microstructure and device performances of CZTSSe solar cells.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Ting Feng,Fang Wang,Jianfei Lei,Yahui Gao,Xiujuan Jin,Yulin zhou,Jianhui Jiang
In-situ engineered heterogeneous transition metal electrocatalysts with excellent hydrogen evolution reaction performance are generally challengeable in the domain of electrocatalysis . Here, we provide a robust CoO/CoSe 2 hybrid electrocatalyst towards hydrogen evolution reaction in a wider pH limits through an effective in situ partial surface-oxidation-selenization route. The purpose and ideas of the design are elaborated by the clever use of the process of partial transforming MOFs to LDHs , in situ growing ZnCo-LDHs on the surface of ZIF-8, increasing the number of oxygen-containing groups on the surface of MOFs to achieve more Co and subsequent CoO, and constructing CoO/CoSe 2 heterostructure materials by further selenization. More importantly, the CoO/CoSe 2 nanoparticles is encapsulated with in-situ grown nitrogen-doped graphitized carbon shell and embedded in N, Se co-doped carbon network. Owing to the well-designed nanostructure and the synergistic effect from CoO and CoSe 2 , this hybrid electrocatalyst show substantially enhanced activity and improved long-term durability beyond CoO under both acid and alkaline conditions. This research work may pave a new avenue for the design of universal CoO-based electrocatalysts and their application in clean energy related fields.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 27
·8537-8544
·
IF 7.393
Zhongyuan Guan,Haihang Ye,Peiwen Lv,Lijin Wang,Jing Zhang,Bin Zou,Aiwei Tang
Multinary Cu-based chalcogenide nanocrystals (NCs) are excellent candidates for optoelectronic applications, but their growth mechanism and its impacts on the NCs’ optical properties remain controversial. Herein, we employed a simple colloidal chemistry method for the growth of multinary Cu-based NCs including ternary Cu–In–S NCs, quaternary Cu–In–Se–S NCs, and five-component Cu–In–Zn–Se–S NCs, to explore their growth mechanism and investigate their optical properties. It is found that the ternary Cu–In–S NCs contain a large number of copper vacancies, which affect the major acceptor level for the exciton recombination. With the high reaction activity of Se, the quaternary Cu–In–Se–S NCs form at low reaction temperature and have a red-shift of the photoluminescence (PL) maximum due to the recombination from the conduction band to the acceptor level. The formation process of five-component Cu–In–Zn–Se–S NCs highly depends on the Zn amount, which shows a competitive relationship between the NCs’ growth and diffusion of Zn, leading to the red- and blue-shift of PL maximum, respectively. Our study provides a clear map for the growth of multinary Cu-based NCs and shows their impacts on optical properties.
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高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 16
·2100474
·
IF 9.926
Dong Huang,Jun Bo,Ronghong Zheng,Chengzhao Luo,Xiaojuan Sun,Qinyi Li,Dongyang Shen,Zhishuai Zheng,Mengyu Chen,Yixing Yang,Aiwei Tang,Song Chen,Yu Chen
All-inorganic perovskite quantum dots (QDs) have emerged as a new category of low-cost semiconducting luminescent materials for optoelectronic applications. However, their poor stability has become the main challenge that impedes their potential applications. Herein, Ni-doped CsPbBr 3 QDs with lead phosphate (Pb 3 (PO 4 ) 2 ) shell through surface sacrificial coating (c-Ni-CsPbBr 3 ) have been developed based on a modified thermal injection approach. The synergistic effect of Ni doping and Pb 3 (PO 4 ) 2 coating effectively improves the stability and optical performances of CsPbBr 3 QDs, including photoluminescence (PL) intensity, the average lifetime, and PL quantum yield (QY). Thus, the c-Ni-CsPbBr 3 QDs demonstrate the full width at half maxima (FWHM) and PLQY being 18.42 nm and 90.77%, respectively. The PL intensity of c-Ni-CsPbBr 3 can be maintained at 81% of its original value after being heated at 100 °C for 1 h. No phase transformation can be observed after being stored under ambient conditions (25 °C, 60% relative humidity (RH)) for 21 days. In addition, by combining green c-Ni-CsPbBr 3 QDs, red CdSe-based QDs and the blue GaN chip, a QD enhancement film (QDEF) is fabricated to form a liquid crystal display (LCD) backlit with a wide color gamut covering cover 121% of the National Television System Committee (NTSC) standard.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 13
·2008591
·
IF 18.808
Lile Dong,Lining Sun,Wenjuan Li,Yunping Jiang,Yingying Zhan,Luodan Yu,Yu Chen,Guobin Hong
Transition metal selenide nanodots (NDs) represent distinctive antitumor agents for cancer treatment, but their non-biodegradability may bring serious adverse effects and potential long-term toxicity to internal tissues/organs, which substantially hinder their further clinical translations. In this work, the construction of a multifunctional theranostic nanosystem based on degradable and excretable ultrasmall Rh 3 Se 8 NDs by a general bovine serum albumin-templated strategy is reported. The constructed Rh 3 Se 8 NDs exhibit distinctively high photothermal-conversion efficiency (57.5%) in the second near-infrared biowindow, making them highly applicable for photoacoustic imaging and photonic hyperthermia at the desired wavelength. Rh 3 Se 8 NDs exhibit a high tumor growth inhibition rate (98.1%) on 4T1 breast tumor-bearing mice due to the desirable photonic hyperthermia performances. Especially, the fabricated Rh 3 Se 8 NDs feature the large X-ray attenuation coefficients of the Rh component for contrast-enhanced X-ray computed tomography imaging. Importantly, the prominent biodegradability of Rh 3 Se 8 NDs enables their quick excretion out of the body for potentially avoiding inflammation and mitigating long-term toxicity. Therefore, this work highlights the construction of proof-of-concept biodegradable and excretable ultrasmall inorganic theranostic nanosystems for multiple bioimaging-guided cancer nanotherapeutics, guaranteeing the further clinical translations of inorganic nanoparticles in biomedicine.
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