MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Jiajia Yang,Xiaodan Zhang,Yuming Huang
Convenient and reliable tetracycline hydrochloride (TC) detection is necessary due to its harmfulness. Herein, Se-doped ZnMn 2 O 4 /nitrogen carbon (NC) catalyst was effectively synthesized through step-by-step calcination in an N 2 atmosphere, which possessed enhanced oxidase mimetic activity. After Se doping, the oxidase-like activity of the catalyst is 2.75-fold and 1.64-fold higher than that of the Zn-Mn ZIF precursor and ZnO/MnO/NC, respectively. The Michaelis–Menten constant for Se-doped ZnMn 2 O 4 /NC with TMB substrate is 0.047 mM, which has higher affinity towards TMB than other manganese-containing materials. More oxygen vacancy in Se-doped ZnMn 2 O 4 /NC was recognized as the main sites for activating oxygen to produce reactive oxygen species to oxidize TMB. Based on the inhibitory effect of TC on the colorimetric system of TMB/Se-doped ZnMn 2 O 4 /NC, a simple method for TC detection was proposed with a wide linear range of 2–100 µM and 100–500 µM and a low detection limit of 0.88 µM. The method exhibited good selectivity to TC among some ions and antibiotics, and TC in the practical water samples was successfully detected.
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高影响因子
Batteries & Supercaps
·
2023
·
IF 5.7
Jiaquan Liu,Zitong Ding,Qiuman Zhou,Lanfei Wei,Yurong Yan
Graphical Metal selenides/biomass derived carbon composite (Ni,Co)Se/BLC was prepared from banana leaves through carbonization and hydrothermal reaction. The metal selenides provide high pseudo-capacitance and the hierarchical porous structure of activated carbon promotes the uniform distribution of them. The prepared composite shows excellent electrochemical properties as supercapacitor electrode. Modification with transition metal compounds is an effective strategy to improve the capacitance of biomass derived carbon. In this work, high-performance (Ni,Co)Se/banana leaves derived carbon ((Ni,Co)Se/BLC) composite with 3D porous structure was prepared by two-step carbonization and subsequent hydrothermal reaction process. The prepared (Ni,Co)Se/BLC exhibits a high specific capacitance of 840.6 F/g at a current density of 1 A/g, which is more than five times comparing with the carbon matrix. Asymmetric supercapacitor, assembled with the (Ni,Co)Se/BLC composite as the positive electrode and BLC as the negative electrode, exhibits a wide potential window of 1.5 V, delivers a high energy density of 34.3 Wh/kg at a power density of 749.8 W/kg, and the power density can reach 7500 W/kg at the energy density of 19.4 Wh/kg. The results reveal that the modification of metal selenide can greatly improve the electrochemical properties of biomass derived carbon, which is significant for the application of biowaste in supercapacitor electrode materials.
研究领域:
材料科学
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能源存储
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环境科学
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Electrocatalysis
·
2023
·Vol. 14
·期 5
·776-787
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IF 3.1
Zheng Yingping,Yu Dehua,Zhang Ke,Xu Wei,Ma Kaili,Wang Yuhang,Lou Yongbing
As a representative anodic reaction, the oxygen evolution reaction (OER) is often combined with hydrogen evolution, carbon dioxide reduction, and other cathodic reactions. Bimetallic selenides can satisfy the requirement of efficiency and economy for OER. However, the OER performance of Fe-Co-Se is less than satisfactory, restricted by the limited inherent active sites. Therefore, by doping P into Fe-Co-Se, the electron density and mass transfer were successfully adjusted. The 3D dandelion-like flower Fe-Co-Se-P/CC showed η 10 of 210 mV and the 45.3 mV dec −1 Tafel slope better than Fe-Co-Se/CC and RuO 2 . Experimental investigations demonstrated that outstanding OER activity was ascribed to the double modulation influences of P dopant both in electron environment and morphology which could not only improve conductivity but also enrich catalytic reactive sites. This work presents another choice for the design of a transition metal OER catalyzer and propels the development of electrocatalytic oxygen production to higher efficiency and lower cost. Graphical Abstract 3D dandelion-like flowers Fe - Co-Se-P structure anchored on carbon cloth has been firstly synthesized as economy and efficient OER electrocatalyst, which displays outstanding catalytic perform ance (equipped with 210 mV low overpotential at η 10 ) and stability benefited from the double modulation effect of P doping on the electronic environment and morphology.
研究领域:
材料科学
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电化学
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Biomedical Materials
·
2023
·Vol. 18
·期 3
·035013
·
IF 4
Yali Liu,Wuyi Liu,Guobing Li,Wenjing Lai,Changpeng Hu,Qian Zhang,Min Zhou,Laichun Lu,Jingbin Huang
Cu2−xSe nanoparticles (Cu2−xSe NPs) as a new therapeutic drug platform is widely used in disease treatment due to their strong near-infrared optical absorption. In recent years, with their continuous expansion of applications in different fields, their own biological effects have received increasing attention. However, little is known about the effect of Cu2−xSe NPs on cancer cell. In this research, we found that Cu2−xSe NPs inhibited proliferation of HepG2 cells (IC50: 15.91 μM) and SMMC-7721 cells (IC50: 43.15 μM) and they mainly induced cell cycle arrest at the G2/M phase. Moreover, Cu2−xSe NPs inhibited HepG2 and SMMC-7721 cell migration and lamellopodia formation. Further studies indicated that Cu2−xSe NPs impaired mitochondrial respiration by inhibiting electron transport chain complex activity, thus reducing adenosine triphosphate levels. The insufficient energy supply subsequently impaired actin cytoskeleton assembly, ultimately inhibiting HepG2 and SMMC-7721 cell proliferation and migration. These findings suggest that Cu2−xSe NPs may have potentially antitumor activity, which might provide new insights of NPs into specific cancer treatment.
研究领域:
纳米技术
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肿瘤学
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细胞生物学
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药理学
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PubMed
高影响因子
Small Science
·
2023
·Vol. 3
·期 12
·2300134
·
IF 12.7
Xiaomeng Shi,Zhichao Zeng,Yongqing Wen,Hongtu Zhang,Yabin Zhang,Yaping Du
All-solid-state lithium batteries (ASSLBs) are a research hotspot for their superior safety. The solid electrolytes (SEs) are key components in ASSLBs, and the emerging rare-earth halide SEs (RE-HSEs) are valued for their comprehensive performances of good ionic conductivity, electrochemical stability, and deformability. In addition, cathode materials can influence the properties of ASSLBs, and sulfur (S) attracts much attention due to the lower toxicity and much higher energy density compared with commercial oxide cathodes. However, the S possesses poor electronic conductivity, which can be improved by the introduction of selenium (Se) with much higher electronic conductivity. In this work, a series of Se x S 1– x composites is synthesized by a melting method. Due to the introduction of Se and the enriched defects from the melting process, the electronic and ionic conductivities of Se x S 1– x are improved. After application in ASSLBs based on RE-HSE Li 3 YBr 6 , the Se x S 1– x materials exhibit good performances with low polarizations, good cycling stabilities, and excellent rate properties at room temperature. Moreover, the assembled solid batteries can realize stable cycling performance (100 cycles) at low temperature (−30 °C) and a normal discharge–charge process at high temperature (120 °C).
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Animal Nutrition
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2023
·
IF 6.3
Chao Zhu,Zifang Wu,Qimin Liu,Xiaolin Wang,Lijuan Zheng,Shuyang He,Fangxia Yang,Hong Ji,Wuzi Dong
The production of selenium-enriched fish can contribute to alleviating selenium deficiency in human diets. However, it is still unclear which selenium source, as an additive, can efficiently and cost-effectively produce high-quality selenium-enriched fish. This study evaluated the effects of selenium nanoparticles (SeNP), selenite, and selenomethionine (SeMet) on the growth, antioxidant capacity, selenium content, selenium speciation, and meat quality of grass carp. Ten diets were prepared, including a basal diet (BD) and three concentrations (0.1, 0.3, and 0.9 mg/kg) of SeNP, selenite, and SeMet. A total of 600 fish (250.79 ± 1.57 g) were randomly assigned to 30 tanks (3 tanks/group). Fish were fed the experimental diet three times daily for 60 d. In this study, SeNP most significantly promoted the growth and antioxidant capacity of grass carp, with 0.3 mg/kg SeNP identified as the optimal additive concentration. Additionally, SeNP demonstrated equally excellent bioavailability as SeMet and significantly increased the content of SeMet in grass carp ( Ctenopharyngodon idella ) muscle. Furthermore, compared to SeMet and selenite, dietary SeNP could more significantly enhance the content of selenocysteine (SeCys 2 ) and methylselenocysteine (MeSeCys) in grass carp muscle tissue. In addition, we have demonstrated that SeCys 2 and MeSeCys promote apoptosis of cancer cells (Hela) through the mitochondrial apoptotic pathway (involving Bax and Bcl-2). Furthermore, as an additive, 0.3 mg/kg SeNP significantly improved the flesh quality of grass carp by reducing crude fat and heavy metal content, as well as increasing the levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and the ratio of n-3/n-6 polyunsaturated fatty acid (PUFA). In summary, SeNP is the most suitable additive for producing selenium-enriched fish.
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PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2024
·
IF 5.8
Zongyi Zheng,Jiaji Zhu,Huagao Fang,Jiewu Cui,Yong Zhang,Yunsheng Ding
Stretchable self-healing electromagnetic interference (EMI) shielding materials can automatically restore their original performance after mechanical damage, and can still maintain over 20 dB EMI shielding effectiveness (EMI SE) under tensile state. In this work, a series of highly stretchable self-healing polyurethane elastomer PUBNS-X was prepared by introducing dynamic disulfide bonds, boronic ester bonds and boron-nitrogen coordination (B-N) on the polyurethane main chain. It was found that B-N coordination significantly increased the elongation at break and the tensile strength. The high dynamic reversibility of boronic ester, disulfide bond and B-N coordination bond synergistically endowed PUBNS-X with excellent temperature-triggered self-healing properties. The mechanical properties of PUBNS-X can be restored to more than 90 % at 60 °C. The pre-assembled silver nanowires (AgNWs) conductive network was then introduced into the polyurethane surface by taking advantage of the fluidity of the dynamically bonded polyurethane backbone to obtain a series of stretchable self-healing electromagnetic shielding composites (AgNWs/PUBNS-Y). The results showed that the EMI SE of AgNWs/PUBNS-Y can reach ∼55 dB, and the conductivity can be restored to 82 % of the original value after healing at 60 °C. The investigation of the electromagnetic interference shielding performance of composites under different strains showed that the EMI SE of AgNWs/PUBNS-3 can still maintain 20 dB under 90 % strain. These composites will have broad potential applications in the fields of flexible wearable electronic products, bionic intelligent materials and soft robots.
研究领域:
材料科学
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纳米技术
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电磁屏蔽
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聚合物化学
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可穿戴技术
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Wang Xingzhi,Gao Yan,Liu Xiaonan,Xu Huaiyu,Liu Ruixiang,Song Jiaojiao,Li Bo,Shen Huaibin,Fan Fengjia
High-energy exciton emission could allow single-component multi-colour display or white light-emitting diodes. However, the thermal relaxation of high-energy excitons is much faster than the photon emission of them, making them non-emissive. Here, we report quantum dots with light hole-heavy hole splitting exhibiting strong high-energy exciton electroluminescence from high-lying light holes, opening a gate for high-performance multi-colour light sources. The high-energy electroluminescence can reach 44.5% of the band-edge heavy-hole exciton emission at an electron flux density Φ e of 0.71 × 10 19 s −1 cm −2 − 600 times lower than the photon flux density Φ p (4.3 × 10 21 s −1 cm −2 ) required for the similar ratio. Our simulation and experimental results suggest that the oscillator strength of heavy holes reduces more than that of light holes under electric fields. We attribute this as the main reason for strong light-hole electroluminescence. We observe this phenomenon in both Cd x Zn 1-x Se-ZnS and CdSe-CdS core-shell quantum dots exhibiting large light hole-heavy hole splittings.
研究领域:
材料科学
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光电技术
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纳米技术
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Letu Siqin,Wenjing Xin,Ruijian Liu,Hongmei Luan,Lei Wang,Yiming Wang,Shuyu Li,Jingyuan Guo,Yu He,Jiayong Zhang,Bin Yao,Chengjun Zhu
Interfaces quality have always been considered the key factors in the fabrication of efficient Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells, and harmful defects at the interface can significantly reduce the performance of the device. Here, we propose a dual passivation strategy by adding Na to the surface of the absorber layer (CZTSSe) to passivate the CZTSSe/CdS interface and treating the buffer layer (CdS) using ultraviolet (UV) irradiation to passivate the CdS/ZnO interface. Due to the Na doping passivation, the absorber surface conductivity increases while the roughness decreases and detrimental defects that can lead to nonradiative recombination are reduced. The power conversion efficiency (PCE) of the cell is improved by about 1 percentage point by Na passivation. The contributions of open-circuit voltage ( V oc ), short-circuit current density ( J sc ), and fill factor (FF) to the improvement of PCE have been quantified as 50.64%, −5.58%, and 54.94%, indicating that Na doping can significantly boost V oc and FF. UV-ozone passivation reduces residual carbon organics in the CdS buffer layer , weakens carrier recombination, allows for more light absorption , and widens the depletion region , which favors efficient carrier collection. The estimated contribution of V oc , J sc , and FF to the PCE of the device is 8.78%, 119.59%, and −28.37%, respectively, demonstrating that UV-ozone passivation can significantly improve the J sc of the device. The two passivation strategies complement each other's advantages and achieve a synergistic effect . Our prepared champion device exhibits a PCE of 10.69% and remarkable long-term stability.
研究领域:
材料科学
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光伏技术
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界面工程
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rui Huang,Yinhua Wang,Yixin Pan
Owing to industrialization, the increased generation of electronic waste, and intensified metal ore and coal extraction activities, certain geographical areas are currently confronted with widespread selenium contamination in their groundwater. Consequently, there has been a considerable surge of interest in exploring techniques for selenium removal. In this study, we propose the utilization of single-layer dispersion of Ti 3 CN to facilitate the elimination of Se(Ⅳ). The results of the spectral analysis demonstrated that the removal of Se(Ⅳ) using Ti 3 CN occurs via a combined process of adsorption and reduction reactions. These two substances collaborated to create an inner sphere complex, which facilitated the reduction of Se(Ⅳ) to Se(0), ultimately resulting in the rapid formation of a co-precipitation product. The experimental results show that the adsorption capacity of Ti 3 CN for Se(Ⅳ) was notably sensitive to pH value, showing an adsorption capacity of 871.2 mg/g at pH 2. Furthermore, it was noted that the experimental results conformed well to the quasi-second-order kinetic model, with the Langmuir model effectively representing the adsorption isotherm data of Se(Ⅳ). This indicates that the process of Se(Ⅳ) removal by Ti 3 CN operates through chemical monolayer homogeneous adsorption. Notably, the presence of multiple ions revealed that only a selected few ions were able to impede the elimination of Se(Ⅳ). These findings underscore the potential of Ti 3 CN MXene as an efficient agent for treating selenium-containing wastewater.
研究领域:
环境科学
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材料科学
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Xiangyang Zhao,Lingling Wang,Yawei Wang,Xingyu Zhang,Rong Fang,Yue Zhou,Rui Guo,Xintong Zhang,Yichun Liu
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cells are considered a promising new type of film cell, due to their rich elemental reservation and excellent photovoltaic performance. However, the deleterious defects at the heterojunction interface severely hinder charge transport, separation, and extraction, significantly limiting the photovoltaic performance of CZTSSe solar cells. In this study, a simple method involving the incorporation of Cd 2+ and Ag + dual-ion at the heterojunction interface was proposed to reduce interfacial defects. The results showed that Cd 2+ and Ag + dual-ion interface deposition effectively reduced the [2Cu zn + Sn zn ] harmful defects near the heterojunction interface and subsequently reduced the number of recombination centers in the interface. This led to improved carrier recombination at the interface. Meanwhile, the devices achieved a wider depletion width, which was more favorable for carrier collection. Ultimately, the conversion efficiency increased by 32.81 %. This simple interface dual-ion deposition strategy offers a promising strategy for further enhancing the efficiency of CZTSSe cells.
研究领域:
材料科学
·
光伏技术
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Haixuan Gao,Chuanhe Ma,Jinhui Zhang,Jinchun Jiang,Ye Chen,Lin Sun,Hailong Wang
In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm–1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20–35% higher than the other three Cd-salts in the light range of 350–1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
研究领域:
材料科学
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光伏技术
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可再生能源
·
半导体物理
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高影响因子
危险品化学品经营许可证（带存储）