MATERIALS & DESIGN
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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
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 32
·14808-14814
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IF 3.591
Mingjie Li,Xuan Zheng,Lixiang Xie,Youjun Yu,Jinlong Jiang
Recently, transition metal selenides have been investigated extensively as promising electrode materials for high-performance supercapacitors. Herein, multi-component CoSe2/CNTs@g-C3N4 composites are prepared using a two-step hydrothermal method by incorporating one-dimensional CNTs and two-dimensional g-C3N4 nanosheets to form a network-like structure. The CoSe2/CNTs@g-C3N4 composite with a mass ratio of 1 : 3 (CNTs to g-C3N4) shows an ultra-high specific capacity of 445.4 mA h g−1 (3563.0 F g−1) at 1 A g−1, which is more than 2 times that of pure CoSe2. The assembled asymmetric supercapacitor based on CoSe2/CNTs@g-C3N4 delivers a high energy density of 77.1 W h kg−1 at 850 W kg−1. The striking capacitive performance is ascribed to the multi-dimensional synergistic contribution of two kinds of carbon materials to the electric conductivity and spatial structure of the composites, involving the improved charge transfer due to connecting g-C3N4 and the active CoSe2 by the high conductive CNT bridges, and the short ion diffusion pathways on the porous carbon framework constructed by g-C3N4 nanosheets with the assistance of CNTs.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 38
·2105001
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IF 18.808
Yushuai Xu,Jian Han,Yidong Luo,Yaochun Liu,Junping Ding,Zhifang Zhou,Chan Liu,Mingchu Zou,Jinle Lan,Ce-wen Nan,Yuanhua Lin
Gaseous CO 2 reduction driven by solar energy is a promising solution to the current energy crisis and environmental problems. Although thermocatalysts, electrocatalysts, and photocatalysts are developed as classical strategies for CO 2 reduction, it remains a challenge for high efficiency and CO 2 net reduction during this process. Here, a multi-field driven hybrid catalyst, Pt/ZnO nanorod arrays/Bi 1-x Er x CuSeO, is designed using the photo-thermoelectric effect, which can take advantage of both photocatalysis and thermocatalysis. The results indicate that the maximum CO production rate of 2.91 µmol g −1 h −1 at 423 K can be realized in such Pt/ZnONR/Bi 0.9 Er 0.1 CuSeO hybrid catalyst, as can be ascribed to a synergetic photo-thermoelectric effect (i.e., light irradiation can provide heat, photo-excited carriers, and the concomitant Seebeck voltage). The band alignment of ZnO/BiCuSeO heterojunction and carriers transport are proposed to be optimized by the Er doped BiCuSeO thermoelectric supports, greatly enhancing the catalytic performance. The application of thermoelectric support could be promising in the structure design of multi-field driven hybrid catalysts, and such a photo-thermoelectric catalytic process demonstrates a desirable way of solar energy utilization in CO 2 transformation.
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Advanced Optical Materials
·
2021
·Vol. 9
·期 16
·2100474
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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
International Journal of Nanomedicine
·
2021
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IF 6.4
Wanzhen Li,Ping Song,Ying Xin,Zhao Kuang,Qin Liu,Fei Ge,Longbao Zhu,Xuguang Zhang,Yugui Tao,weiwei zhang
Background With the development of bacterial resistance, the range of effective antibiotics is increasingly becoming more limited. The effective use of nanoscale antimicrobial peptides (AP) in therapeutic and diagnostic methods is a strategy for new antibiotics.Methods Combining both AP and cadmium selenide (CdSe) into a composite material may result in a reagent with novel properties, such as enhanced antibacterial activity, fluorescence and favorable stability in aqueous solution.Results AP-loaded CdSe NPs (AP-CdSe NPs) showed strong antibacterial activity against multidrug-resistant (MDR) Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) in vitro and in vivo. Colony-forming unit (CFU) and minimum inhibitory concentration (MIC) assays showed that AP-CdSe NPs have highly effective antibacterial activity. The quantitative analysis of apoptosis by flow cytometry analysis further confirmed that MDR E. coli and S. aureus treated with AP-CdSe NPs had death rates of 98.76% and 99.13%, respectively. Also, AP-CdSe NPs was found to inhibit bacterial activity in an in vivo bacteremia model in mice infected with S. aureus. In addition, the antibacterial mechanism of AP-CdSe NPs was determined by RNA sequencing analysis. Gene ontology (GO) analysis and Kyoto encyclopedia of genes and genomes (KEGG) pathway analysis revealed the molecular mechanism of the antibacterial effect of AP-CdSe NPs. Importantly, histopathology analysis, and hematological toxicity analysis indicated that AP-CdSe NPs had few side effects.Conclusion These results demonstrate that AP loaded on CdSe NPs had a higher water solubility, bioavailability and antibacterial effect compared with raw AP. This study reports findings that are helpful for the design and development of antibacterial treatment strategies based on AP.
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PubMed
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 9
·2100052
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IF 6.147
Lijuan Lai,Fangshu Xing,Chuchu Cheng,Caijin Huang
Hierarchical structure design and use of cocatalyst are effective strategies to improve the photocatalytic performance of semiconductor catalysts. Herein, 0D NiSe 2 nanoparticles decorated 2D ZnIn 2 S 4 ultrathin nanosheet-assembled microflowers using a facile solvothermal approach are synthesized. The as-obtained NiSe 2 /ZnIn 2 S 4 nanocomposites exhibit enhanced visible-light photocatalytic H 2 -evolution activity of 1487 µ mol (g h) –1 , three times higher than that of pure ZnIn 2 S 4 . The hierarchical structure of ZnIn 2 S 4 microflowers exposes more surface-active sites and enhances light harvesting. Meanwhile, the formation of heterojunctions between ZnIn 2 S 4 nanosheets and NiSe 2 nanoparticles creates a space-charge separation region that facilitates the transfer and separation of photoinduced electrons and holes, resulting in improved photocatalytic H 2 production. This work provides a promising strategy for designing and constructing 0D/2D heterojunctions for efficient solar-driven energy conversion.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Xue Zhang,Zhiwei Cheng,Puhui Deng,Linping Zhang,Yu Hou
A designed type-II heterojunction photocatalyst , NiSe 2 /Cd 0.5 Zn 0.5 S (NiSe 2 /CZS), was successfully synthesized and it exhibits outstanding photocatalytic hydrogen evolution performance. The optimal loading amount of NiSe 2 on Cd 0.5 Zn 0.5 S is 13 wt %, and the corresponding hydrogen production rate is approximately 121.01 mmol g −1 h −1 under visible light. The heterojunction structure between Cd 0.5 Zn 0.5 S and NiSe 2 promoted the separation of photogenerated electron-hole pairs, effectively suppressed the photogenerated carrier recombination and endowed the material with excellent interfacial charge transfer properties, thus improving the photocatalytic performance.
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高影响因子
Nano Today
·
2021
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IF 20.722
Shaojun Peng,Hao Wang,Yongjie Xin,Wei Zhao,Meixiao Zhan,Jingchao Li,Rong Cai,Ligong Lu
Hydrogen selenide (H 2 Se) plays key roles in diverse physiological processes ; however, the noninvasive regulation of H 2 Se levels in living systems has been rarely achieved and the functional mechanism of H 2 Se in cancer cells remains unclear. Herein, biocompatible ferrous selenide (FeSe 2 ) nanoflowers with second near-infrared (NIR-Ⅱ) photoactivatable H 2 Se generation were developed for metastasis-inhibited cancer therapy. Upon NIR-II laser irradiation, FeSe 2 nanoflowers generated mild photothermal effect, leading to their decomposition and on-demand release of H 2 Se to induce cell death. Such a FeSe 2 nanoflower-mediated synergistic photothermal-H 2 Se gas therapy effectively suppressed the tumor growth in a subcutaneous breast tumor-bearing mouse model. Furthermore, the local generation of H 2 Se was proved to down-regulate the expression levels of metastasis-related proteins, contributing to the complete inhibition of liver and lung metastasis. Overall, we report a NIR-Ⅱ photoactivatable H 2 Se production strategy for metastasis-inhibiting cancer therapy, which may be mediated by autophagy, opening a new avenue for the biomedical application of H 2 Se in the future.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jingling Liu,Qihang Shen,Zhiwen Liu,Xueru Gao,Ziqi Zhang,Xinsheng Liu,Ke Cheng,Zuliang Du
Flexible Cu2ZnSnSe4 (CZTSe) solar cells gradually attract much attention due to their low-cost, lightweight, and environmentally friendly features. However, the efficiency of flexible CZTSe solar cells obtained through the nonvacuum green electrodeposition process remains sluggish (3.82%), far away from that obtained from other methods (∼10% by magnetron sputtering). Herein, a championed 6.33% efficiency of flexible CZTSe solar cells prepared by the electrodeposition process is achieved through an in situ electrochemical treatment (ET) process. It is found that the ET process drives the formation of a thin MoOx layer, evoking a series of beneficial results, thus accounting for an enhancement in photovoltaic performance. With the ET process, the MoSe2 thickness is compressed and Cu- and Sn-related undesirable defects/secondary phases are inhibited, leading to improved film quality. Additionally, it prolongs the depletion region width and minority lifetime, accelerates the charge separation and collection, relieves the band tails, and favorably reverses the band bending from downward to upward at/near grain boundaries. With these effects, the efficiency increases from 4.21% to 6.33%, far beyond the highest reports on electrodeposited flexible CZTSe solar cells. Our findings offer a promising way to improving Mo foil-based flexible devices and mark a significant breakthrough for the development of electrodeposition-processed flexible CZTSSe-based solar cells.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hua Yan,Jiangtao Dong,Xuan Huang,Xuezhong Du
Two novel stimuli-responsive drug delivery systems (DDSs) were successfully created from bovine serum albumin- or myoglobin-gated upconversion nanoparticle-embedded mesoporous silica nanovehicles (UCNP@mSiO2) via diselenide (Se–Se)-containing linkages. More importantly, multiple roles of each scaffold of the nanovehicles were achieved. The controlled release of the encapsulated drug doxorubicin (DOX) within the mesopores was activated by triple stimuli (acidic pH, glutathione, or H2O2) of tumor microenvironments, owing to the conformation/surface charge changes in proteins or the reductive/oxidative cleavages of the Se–Se bonds. Upon release of DOX, the Förster resonance energy transfer between the UCNP cores and encapsulated DOX was eliminated, resulting in an increase in ratiometric upconversion luminescence for DOX release tracking in real time. The two protein-gated DDSs showed some differences in the drug release performances, relevant to structures and properties of the protein nanogates. The introduction of the Se–Se linkages not only increased the versatility of reductive/oxidative cleavages but also showed less cytotoxicity to all cell lines. The DOX-loaded protein-gated nanovehicles showed the inhibitory effect on tumor growth in tumor-bearing mice and negligible damage/toxicity to the normal tissues. The constructed nanovehicles in a spatiotemporally controlled manner have fascinating prospects in targeted drug delivery for cancer chemotherapy.
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PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 27
·8537-8544
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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
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 27
·8659-8665
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IF 7.393
Ya-Nan Li,Zi-Xia Chen,Wen-Dong Yao,Ru-Ling Tang,Sheng-Ping Guo
Metal chalcogenides are charming candidates for nonlinear optical (NLO) materials due to their multiple functional structural units and large polarizability. Here, isostructural Sn-based chalcogenides BaZnSnQ4 (Q = S, Se) were successfully synthesized based on the idea of heterovalent cations co-substitution of the Ga site in the parent BaGa2Se4. They crystallize in an orthorhombic system with polar space group Fdd2. Their structures are built by the NLO functional motifs ZnQ4 and SnQ4 tetrahedra. BaZnSnS4 (1) and BaZnSnSe4 (2) exhibit good SHG effects (0.6 and 1.0 times than that of AgGaS2) and also show type-I phase-matchable behaviors. In addition, their laser-induced damage thresholds are about 9.8 and 5.7 times higher than that of AgGaS2, respectively. BaZnSnS4 possesses a larger bandgap (3.25 eV) among the quaternary chalcogenide AMIIMIVQ4 (A = Sr, Ba; MII = Zn, Cd, Hg; MIV = Si, Ge, Sn; Q = S, Se) system. On the basis of theoretical calculation result, the source of SHG responses can be assigned to the synergetic effect of large distorted tetrahedral units. The achievement of this work provides a route to obtain new infrared NLO materials.
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