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Acid-stable antimonate based catalysts for the electrocatalytic oxygen evolution reaction

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Nano Research 2023年第4期16卷 4691-4697页

作者： Xiaoping gao Huang Zhou zhe wang Gang Zhou Jin wang Yuen Wu College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Preservation Technology Advanced Research CenterHefei Hualing Co.LtdHefei 230000China School of Science Hubei University of TechnologyWuhan 430068China

Acid-stable and highly active catalysts for the electrocatalytic oxygen evolution reaction(OER)are paramount to the advancement of electrochemical technologies for clean energy conversion and *** this work,based on the density functional theory(DFT)calculations,we systematically investigated the MSb_(2)O_(6)(M=Fe,Co,and Ni)and transition metal(TM)doped MSb_(2)O_(6)(TM-MSb_(2)O_(6),TM=Mn,Fe,Co,Ni,Cu,Zn,Ru,Rh,Pd,Ir,and Pt)as potential antimonate-based electrocatalysts for the *** stability and OER activity of these considered electrocatalysts were systematically studied under acidic *** was found that Rh-NiSb_(2)O_(6),Pt-CoSb_(2)O_(6),Rh-FeSbO4,and Co-NiSb_(2)O_(6)can serve as efficient and stable OER electrocatalysts,and their OER catalytic activities are better than that of the current state-of-the-art OER catalyst(IrO2).Our findings highlight a family of promising antimonate-based OER electrocatalysts for future experimental verification.

关键词： oxygen evolution reaction antimonates acid-stable oxides electrocatalysis density functional theory

Temporal and Spatial Variations of Microbial Carbon Utilization in Water Bodies from the Dajiuhu Peatland, Central China

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Journal of Earth Science 2018年第4期29卷 969-976页

作者： Rui-Cheng wang Hong-Mei wang xing Xiang Yu gao Qing-Wei Song Lin-feng Gong State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan 430074 China State Key Laboratory Breeding Base of Marine Genetic Resources Key Laboratory of Marine Genetic Resources Third Institute of Oceanography SOA Key Laboratory of Marine Genetic Resources of Fujian Province Xiamen 361005 China

To investigate the microbial utilization of organic carbon in peatland ecosystem, water samples were collected from the Dajiuhu Peatland and nearby lakes, central China across the year of 2014. The acridine orange （AO） staining and Biolog Eco microplates were used to numerate microbial counts and determine the carbon utilization of microbial communities. Meanwhile, physicochemical characteristics were measured for subsequent analysis of the correlation between microbial carbon utilization and environmental factors. Results indicated that total microbial counts were between 106107 cells/L. Microbial diversities and carbon utilization rates showed a similar pattern, highest in September and lowest in November. Microbial communities in the peat pore waters preferred to utilize N-bearing carbon sources such as amines and amino acids compared with microbial communities in lakes. The network analysis of microbial utilization of 31 carbon substrates clearly distinguished microbial communities from peat pore waters and those from lakes. Redundancy analysis （RDA） showed the total organic nitrogen content （P=-0.03, F=2.5） and daily average temperature （P=0.034, F=2.4） significantly controlled microbial carbon utilization throughout the sampling period. Our report is the first one to address the temporal and spatial variations of carbon uti- lization of microbial communities which are closely related to the decomposition of organic matter in the Dajiuhu Peatland in context of climate warming.

关键词： carbon source microbial carbon utilization average temperature Dajiuhu Peatland.

Efficient and selective removal of Pb(Ⅱ) from landfill leachate using L-serine-modified polyethylene/polypropylene nonwoven fabric synthesized via radiation grafting technique

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Nuclear Science and Techniques 2024年第4期35卷 144-155页

作者： Xin-Xin feng Cheng Li Xuan-Zhi Mao Wan-Ning Ren Yang gao Yu-Long He zhe xing Rong Li Guo-Zhong Wu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

In this study,to efficiently remove Pb(Ⅱ) from aqueous environments,a novel L-serine-modified polyethylene/polypropylene nonwoven fabric sorbent(NWF-serine)was fabricated through the radiation grafting of glycidyl methacrylate and subsequent L-serine *** effect of the absorbed dose was investigated in the range of 5–50 ***-serine was characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,and scanning electron *** adsorption tests were conducted to investigate the influences of pH,adsorption time,temperature,initial concentration,and sorbent dosage on the Pb(Ⅱ) adsorption performance of *** results indicated that Pb(Ⅱ) adsorption onto NWF-serine was an endothermic process,following the pseudo-second-order kinetic model and Langmuir isotherm *** saturated adsorption capacity was 198.1 mg/***-serine exhibited Pb(Ⅱ) removal rates of 99.8% for aqueous solutions with initial concentrations of 100 mg/L and 82.1% for landfill leachate containing competitive metal ions such as Cd,Cu,Ni,Mn,and ***,NWF-serine maintained 86% of its Pb(Ⅱ) uptake after five use *** coordination of the carboxyl and amino groups with Pb(Ⅱ) was confirmed using X-ray photoelectron spectroscopy and extended X-ray absorption fine structure analysis.

关键词： Landfill leachate Radiation grafting Polyethylene/polypropylene nonwoven fabric Pb(Ⅱ)removal

Electrical properties of garnet-like lithium ionic conductors Li5＋xSrxLa3-xBi2O12 fabricated by spark plasma sintering method

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Frontiers of Materials Science 2012年第3期6卷 216-224页

作者： Yun-Xia gao Xian-Ping wang Qin-xing SUN Zhong ZHUANG Qian-feng FANG Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China

A typical approach involving Pechini method and spark plasma sintering （SPS） method was presented for the preparation of high density Li5＋xSrxLa3_xBi2012 （x = 0, 1） ceramics. Phase formation, microstructure, grain size and electrical properties of the specimens were examined using XRD, SEM and alternating current impedance spectro- scopy （ACIS）. Dense LisLa3Bi2012 and LisSrLa2Bi2012 ceramics with pure garnet-like phase, relative density of 97% and average grain size of about 5 pm were fabricated using this approach. The total conductivities at 298 K of Li5La3Bi2012 and LisSrLa2Bi2O12 ceramics prepared by the SPS method are 5.1 Qian-feng FANG105 and 6.810SS/cm, respectively, 2 times higher than that of samples prepared by the conventional sintering method.

关键词： lithium ionic conductor Lis.xSrxLa3_xBi2012 Pechini method spark plasmasintering (SPS) ionic conductivity

Preparation of cauliflower-like bismuth sulfide and its application in electrochemical sensor

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Chinese Chemical Letters 2008年第5期19卷 585-588页

作者： Qing Xiang wang feng gao Shun xing Li Wen Weng zheng Shui Hu Department of Chemistry Zhangzhou Normal University Zhangzhou 363000 China College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China

A solvothermal process was developed for the preparation of cauliflower-like Bi2S3 from N,N-dimethylformamide （DMF） solution of bismuth nitrate [Bi（NO3）3.5H2O] and thioacetamide （TAA） with 2-undecyl-1-dithioureido-ethyl-imidazoline （SUDEI） as the morphology-controlling agent. The obtained Bi2S3 products were characterized by transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, and X-ray diffraction （XRD）, etc. The sensing properties of Bi2S3 with different morphologies were evaluated by the electrochemical analysis of dopamine （DA） and ascorbic acid （AA） coexisting solution. The results showed that cauliflower-like Bi2S3 showed a better resolving ability than rod-like Bi2S3 for the simultaneous determination of DA and AA,

关键词： Bismuth sulfide Solvothermal synthesis Electrochemical sensor

Infection recurrence following minimally invasive treatment in patients with infectious pancreatic necrosis

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World Journal of Gastroenterology 2020年第22期26卷 3087-3097页

作者： Chong-Chong gao Jia Li feng Cao Xiao-Hui wang Ang Li zhe wang Fei Li Department of General Surgery Xuanwu HospitalCapital Medical UniversityBeijing 100053ChinaDepartment of General SurgeryXuanwu HospitalCapital Medical UniversityBeijing 100053China

BACKGROUND In recent decades,an increasing number of patients have received minimally invasive intervention for infected pancreatic necrosis(IPN)because of the benefits in reducing postoperative multiple organ failure and ***,there are limited published data regarding infection recurrence after treatment of this patient *** To investigate the incidence and prediction of infection recurrence following successful minimally invasive treatment in IPN *** Medical records for 193 IPN patients,who underwent minimally invasive treatment between February 2014 and October 2018,were retrospectively ***,who survived after the treatment,were divided into two groups:one group with infection after drainage catheter removal and another group without *** morphological and clinical data were compared between the two *** different variables were introduced into the correlation and multivariate logistic analysis to identify independent predictors for infection *** and specificity for diagnostic performance were *** Of the 193 IPN patients,178 were recruited into the *** them,9(5.06%)patients died and 169 patients survived but infection recurred in 13 of 178 patients(7.30%)at 7(4-10)d after drainage catheters were *** blood cell(WBC)count,serum C-reactive protein(CRP),interleukin-6,and procalcitonin levels measured at the time of catheter removal were significantly higher in patients with infection than in those without(all P<0.05).In addition,drainage duration and length of the catheter measured by computerized tomography scan were significantly longer in patients with infection(P=0.025 and P<0.0001,respectively).Although these parameters all correlated positively with the incidence of infection(all P<0.05),only WBC,CRP,procalcitonin levels,and catheter length were identified as independent predictors for infection *** sensitivity and specificity fo

关键词： Infectious pancreatic necrosis Drainage Minimally invasive intervention Infection recurrence C-reactive protein Procalcitonin

Synthesis and fluorescence properties of CdTe:Eu3+ nanocrystals and core-shell SiO2-coated CdTe:Eu3+ nanospheres

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Rare Metals 2019年第10期38卷 989-995页

作者： Jun-Fang gao Jun-Hong Yang Xiao-Yong Zhang Jun Zhao xing-wang Liu Bing-feng Shi Key Laboratory of Materials Physical Chemistry Baotou Teachers CollegeBaotou 014000China Institute of Chemistry Northeast Normal UniversityChangchun 130000China

Eu3+ doped-CdTe(CdTe:Eu3+)nanocrystals were prepared via a facile hydrothermal method,and Eu3+ was successfully incorporated into the crystal lattice of CdTe and measured by X-ray powder diffraction(XRD),transmission electron microscopy(TEM),ultraviolet-visible(UV-Vis) absorption spectroscopy and fluorescence *** CdTe:Eu^3+ nanocrystals still have a cubic crystal structure,and the corresponding XRD peaks of CdTe:Eu3+nanocrystals shift to larger angles compared with those of pure *** CdTe:Eu3+ nanocrystals are monodisperse and the particles size is about 2-4 *** with pure CdTe,the CdTe:Eu^3+ nanocrystals have larger band gap and thus exhibit blueshift in the emission spectra,which could be accounted for by the energy transfer between Eu^3+ and *** enhance the stability and functionality of CdTe:Eu3+nanocrystals,the CdTe:Eu3+nanocrystals were coated with SiO2 and the core-shell SiO2-coated CdTe:Eu3+nanocrystals(CdTe:Eu^3+@SiO2) were prepared via microemulsion *** results show that CdTe:Eu3+nanocrystals are uniformly dispersed in the shell,and CdTe:Eu3+@SiO2 nanospheres are uniformly spherical with an average diameter of about 75 *** fluorescence emission of CdTe:Eu3+@SiO2(567 nm) shows a blueshift compared with that of CdTe:Eu^3+nanocrystals(632 nm),possibly because of altered surface properties after SiO2 ***:Eu^3+and CdTe:Eu^3+@SiO2 with tunable photoluminescence are potentially useful in fabricating optical and bioimaging devices.

关键词： CdTe:Eu^3+nanocrystals Doping Core-shell SiO2 Fluorescent properties

Innovative preparation of Co@Cu Fe_(2)O_(4) composite via ball-milling assisted chemical precipitation and annealing for glorious electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 559-569页

作者： xing feng Pengfei Yin Limin Zhang Xiyuan Sun Jian wang Liang Zhao Changfang Lu Zhihua gao Yongxin Zhan College of Science Sichuan Agricultural UniversityYa’an 625014China School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

To deal with the growing electromagnetic hazards,herein a Co@CuFe_(2)O_(4)absorbing agent with excellent impedance matching at thin thickness was obtained via an innovative route of ball-milling assisted chemical precipitation and *** as-prepared composite possesses excellent interface polarization ability due to sufficient contact between CuFe_(2)O_(4)NPs and flat Co,and this compressed Co lamella can also provide sufficient eddy current ***,the dipole polarization,electron hopping/conduction,and structural scattering also contribute to the broadband microwave absorption of the ***,the minimum microwave reflection loss achieves-35.56 d B at12.93 GHz for 1.8 mm thickness,and the broadest efficient absorption bandwidth can reach 6.74 GHz for a thinner thickness of 1.72 *** preparation method reported here can be referenced as a new-type route to manufacture electromagnetic absorbers with outstanding performance.

关键词： electromagnetic wave absorption ball-milling cobalt copper ferrite

Fast Transmission Photothermal Radiometry via Sampling by an Internal Computer Sound Card

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Journal of Electronic Science and Technology 2015年第1期13卷 73-77页

作者： Lai-Jun Yan Chun-Ming gao Bin-xing Zhao Qi-Ming Sun feng wang School of Optoelectronic Information University of Electronic Science and Technology of China

During the last few decades, photothermal radiometry（PTR） has been greatly developed and widely applied in the field of nondestructive testing. However, the traditional PTR system employs an expensive lock-in amplifier to detect the weak photothermal signal, which leads to high cost and long test time. In this paper, a fast transmission PTR system based on sampling by using an internal computer sound card was developed to lower the system cost and shorter the test time. A piece of amorphous silicon（a：Si） thin film solar cells with artificial defects was prepared and tested by the system. The results show that the sharpened defects can be identified easily and quickly according to the significant peaks of the original infrared signal sampled by the internal computer sound card. Furthermore, more detailed defects can be investigated by processing the infrared signal. These validate the effectiveness of the proposed transmission PTR system as a low cost and efficient non-destructive test technique.

关键词： Amorphous silicon thin film solar cells internal computer sound card nondestructive testing transmission photothermal radiometry