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Synergetic catalysis enhancement between H2O2 and TiO2 with single-electron-trapped oxygen vacancy

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Nano Research 2020年第2期13卷 551-556页

作者： Zhijiao Wu Kai Guo shuang cao Wenqing Yao Lingyu Piao CAS Key Laboratory of Standardization and Measurement for Nanotechnolog CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Chemnistry Tsinghua UniversityBeijing 100084China University of Chinese Academy of Sciences Beijing 100049China

The TiO2-H2O2 system possesses excellent oxidation activity even under dark ***,the mechanism of this process is unclear and *** this work,the binary component system containing TiO2 nanoparticles(NPs)with single electron-trapped oxygen vacancy(SETOV,Vo-)and H2O2 exhibit excellent oxidative performance for tetracycline,RhB,and MO even without light *** systematically investigated the mechanism for the high activity of the TiO2-H2O2 under dark condition Reactive oxygen species(ROS)induced from H2O2 play a significant role in improving the catalytic degradation activities.X-ray photoelectron spectroscopy(XPS)and electron paramagnetic resonance(EPR)results firstly confirm that H2O2 is primarily activated by SETOVs derived from the TiO2 NPs through direct contribution of electrons,producing both.O2^-/·OOH ***,which are responsible for the excellent reactivity of TiO2-H2O2 *** work not only provides a new perspective on the role of SETOVs playing in the H202 activation process,but also expands the application of TiOz in environmental conservation.

关键词： single-electron-trapped oxygen vacancy TiO2 nanoparticle H2O2 dark reaction superoxide radicals hydroxyl radicai

Photocatalytic hydrogen production from seawater under full solar spectrum without sacrificial reagents using TiO_(2) nanoparticles

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Nano Research 2022年第3期15卷 2013-2022页

作者： Jining Zhang Yifan Lei shuang cao Wenping Hu Lingyu Piao Xiaobo Chen CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyCAS Key Laboratory of Standardization and Measurement for NanotechnologyBeijing 100190China School of Science Tianjin UniversityTianjin 300072China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Chemistry University of Missouri–Kansas CityMO 64110USA

Photocatalytic water splitting(PWS)has attracted widespread attention as a sustainable method for converting solar to green hydrogen *** far PWS research has mainly focused on the development of artificial photocatalytic hydrogen production systems for pure *** is more practically attractive to create systems for seawater,i.e.,to reduce the cost of hydrogen production and make better use of naturally occurring water ***,brookite,anatase,and rutile TiO_(2)nanoparticles are investigated as photocatalysts to explore the feasibility of such thought and have shown attractive hydrogen production performance under full solar spectrum without any sacrificial *** is worth noting that,brookite TiO_(2),has more suitable band gap position and excellent photoelectric properties compared with anatase and rutile TiO_(2),and has higher efficiency and stability in the process of hydrogen *** photocatalytic hydrogen production rate of brookite TiO_(2)can reach up to 1,476μmol/g/h,the highest value reported for TiO_(2)-based systems and most other photocatalysts in seawater splitting under full *** the Cl−ions in seawater go through a cycle of oxidation and reduction,no Cl_(2) is detected in the solar hydrogen production from seawater.

关键词： photocatalytic seawater splitting hydrogen production titanium dioxide(TiO_(2))photocatalyst

Genes encoding heat shock proteins in the endoparasitoid wasp,Cotesia chilonis,and their expression in response to temperatures

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Journal of Integrative Agriculture 2018年第5期17卷 1012-1022页

作者： PAN Dan-dan cao shuang-shuang LU Ming-xing HANG San-bao DU Yu-zhou School of Horticulture and Plant Protection & Institute of Applied Entomology Yangzhou University Joint International Research Laboratory of Agriculture and Agri-Product Safety Ministry of Education/Yangzhou University

Five genes encoding heat shock proteins（HSPs）, Cchsp40, Cchsp60, Cchsp70, Cchsc70 and Cchsp90, were cloned and sequenced from Cotesia chilonis using RT-PCR and RACE. The c DNA sequences of Cchsp40, Cchsp60, Cchsp70, Cchsc70 and Cchsp90 were 1 265, 2 551, 2 094, 2 297 and 2 635 bp in length, respectively, with a molecular weight（MW） of 39.1, 60.6, 71.45, 70.19 and 82.92 k Da, respectively. The predicted amino acid sequences of these proteins showed high similarities with published HSPs of other insects in Hymenoptera. Analysis of genomic DNAs indicated that Cchsp40, Cchsp60, Cchsp70 and Cchsp90 lacked introns, but Cchsc70 contained an intron. The results also suggested that CcH SP40 in C. chilonis was the Type II HSP40, Cc HSP60 was a member of the mitochondrial HSP60 family, and Cc HSP90 was a part of cytoplasmic HSP90 A family. Expression patterns varied in the five Cchsps in response to temperature. Expression of Cchsp40 and Cchsp60 was induced significantly by cold but not heat stress. Cchsp70 and Cchsc70 showed similar response to the thermal stress and could be induced by both cold and heat, but their expression levels were consistently lower than that of Cchsp40 and Cchsp60. Cchsp90 could be induced by heat stress and mild cold, but not cold stress. In addition, the results demonstrated Cchsc70 might be constitutive and inducible protein that was expressed during normal cell functioning and also up-regulated in response to stressful stimuli while Cchsp70 was solely inducible protein induced by temperature changes. Overall, results generated from this study could significantly advance the understanding of Cchsps in response to temperature and provide important biological information for C. chilonis insects that reared under different temperatures.

关键词： Cotesia chilonis HSPs genomic structure temperature expression

Comparative study of Co_(3)O_(4)-ZSM-5 catalysts synthesized by different hydrothermal methods for the catalytic oxidation of dichloromethane

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Chinese Chemical Letters 2021年第3期32卷 1224-1228页

作者： Xiaoqi Fei shuang cao Weilong Ouyang Haiqiang Wang Zhongbiao Wu Key Laboratory of Environment Remediation and Ecological Health Ministry of EducationCollege of Environmental&Resources ScienceZhejiang UniversityHangzhou 310058China Zhejiang Provincial Engineering Research Center of Industrial Boiler&Furnace Flue Gas Pollution Control Hangzhou 310058China Department of Environmental Engineering China Jiliang UniversityHangzhou 310018China

In this work,various Co_(3)O_(4)-ZSM-5 catalysts were prepared by the microwave hydrothermal method(MH-Co_(3)O_(4)@ZSM-5),dynamic hydrothermal method(DH-Co_(3)O_(4)@ZSM-5),and conventio nal hydrothermal method(CH-Co_(3)O_(4)/ZSM-5).Their catalytic oxidation of dichloromethane(DCM)was *** characterizations such as X-ray diffractometer(XRD),scanning microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Brunauer-Emmett-Teller(BET),H2 temperature-programmed reduction(H2-TPR),temperature-programmed desorption of O_(2)(O_(2)-TPD),temperature-programmed desorption of NH_(3)(NH_(3)-TPD),diffuse reflectance infrared Fourier-transform spectra with NH_(3)molecules(NH_(3)-DRIFT),and temperature-programmed surface reaction(TPSR)were *** showed that with the assistance of microwave,MH-Co_(3)O_(4)@ZSM-5 formed a uniform core-shell structure,while the other two samples did ***-Co_(3)O_(4)@ZSM-5 possessed rich surface adsorbed oxygen species,higher ratio of Co^(3+)/Co^(2+),strong acidity,high reducibility,and oxygen mobility among the three Co_(3)O_(4)-ZSM-5 catalysts,which was beneficial for the improvement of DCM *** the oxidation of dichloromethane,MH-Co_(3)O_(4)@ZSM-5 presented the best activity and mineralization,which was consistent with the characterizations ***,according to the TPSR test,HCl or Cl_(2)removal from the catalyst surface was also promoted in MH-Co_(3)O_(4)@ZSM-5 by their abundant Bronsted acid sites and the promotion of Deacon reaction by Co_(3)O_(4)or the synergistic effect of Co_(3)O_(4)and *** to the results of in situ DRIFT studies,a possible reaction pathway of DCM oxidation was proposed over the MH-Co_(3)O_(4)@ZSM-5 catalysts.

关键词： Dichloromethane Catalytic oxidation Co_(3)O_(4) ZSM-5 Core-shell structure Microwave hydrothermal method

Does antecolic reconstruction for duodenojejunostomy improve delayed gastric emptying after pylorus-preserving pancreaticoduodenectomy? A systematic review and meta-analysis

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World Journal of Gastroenterology 2012年第43期18卷 6315-6323页

作者： An-Ping Su shuang-shuang cao Yi Zhang Zhao-Da Zhang Wei-Ming Hu Bo-Le Tian Department of Hepatobiliopancreatic Surgery West China Hospital Sichuan University Chengdu 610041 Sichuan Province China

AIM:To evaluate whether antecolic reconstruction for duodenojejunostomy (DJ) can decrease delayed gastric emptying (DGE) rate after pylorus-preserving pancreaticoduodenectomy (PPPD) through literature review and meta-analysis. METHODS:Articles published between January 1991 and April 2012 comparing antecolic and retrocolic reconstruction for DJ after PPPD were retrieved from the databases of MEDLINE (PubMed), EMBASE, OVID and Cochrane Library Central. The primary outcome of interest was DGE. Either fixed effects model or random effects model was used to assess the pooled effect based on the heterogeneity. RESULTS:Five articles were identified for inclusion:two randomized controlled trials and three non-randomized controlled trials. The meta-analysis revealed that antecolic reconstruction for DJ after PPPD was associated with a statistically significant decrease in the incidence of DGE [odds ratio (OR), 0.06; 95% CI, 0.02-0.17; P < 0.00 001] and intra-operative blood loss [mean difference (MD), -317.68; 95% CI, -416.67 to -218.70; P < 0.00 001]. There was no significant difference between the groups of antecolic and retrocolic reconstruction in operative time (MD, 25.23; 95% CI, -14.37 to 64.83; P = 0.21), postoperative mortality, overall morbidity (OR, 0.54; 95% CI, 0.20-1.46; P = 0.22) and length of postoperative hospital stay (MD, -9.08; 95% CI, -21.28 to 3.11; P = 0.14). CONCLUSION:Antecolic reconstruction for DJ can decrease the DGE rate after PPPD.

关键词： Pylorus-preserving pancreaticoduodenectomy Delayed gastric emptying Antecolic reconstruction Retrocolic reconstruction Duodenojejunostomy

A homogenous solid polymer electrolyte prepared by facile spray drying method is used for room-temperature solid lithium metal batteries

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Nano Research 2023年第4期16卷 5080-5086页

作者： Zehao Zhou Tong Sun Jin Cui Xiu Shen Chuan Shi shuang cao Jinbao Zhao College of Physics Qingdao UniversityQingdao 266071China Collaborative Innovation Center of Chemistry for Energy Materials State Key Lab of Physical Chemistry of Solid SurfacesState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

The aggregation of inorganic particles with high mass ratio will form a heterogeneous electric field in the solid polymer electrolytes(SPEs),which is difficult to be compatible with lithium anode,leading to inadequate ionic ***,a facile spray drying method is adopted to increase the mass ratio of inorganic particles and solve the aggregation problems of fillers *** polyvinylidene fluoride(PVDF)with lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)covers the surface of each Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)granules during the nebulization process,then forming flat solid electrolytes via layer-by-layer *** by the atomic force microscope,the obtained solid electrolytes achieve a homogenous dispersion of Young’s modulus and surface electric *** a result,the as-prepared SPEs present high tensile strength of 7.1 MPa,high ionic conductivity of 1.86×10^(−4)S·cm^(−1)at room temperature,and wide electrochemical window up to 5.0 V,demonstrating increased mechanical strength and uniform lithium-ion migration channels for *** to the as-prepared SPEs,the lithiumsymmetrical cells show a highly stable Li plating/stripping cycling for over 1,000 h at 0.1 mA·cm^(−2).The corresponding Li/LCoO_(2)batteries also present good rate capability and excellent cyclic performance with capacity retention of 80%after 100 cycles at room temperature.

关键词： solid polymer electrolytes spray drying homogenous dispersion solid lithium batteries polyvinylidene fluoride/Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(PVDF/LLZTO) surface electric field

The cathode catalysts of hydrogen fuel cell:From laboratory toward practical application

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Nano Research 2023年第4期16卷 4365-4380页

作者： shuang cao Tong Sun Jin-Rong Li Qin-Zhu Li Chun-Chao Hou Qi Sun College of Chemistry and Chemical Engineering Institute for Sustainable Energy and ResourcesQingdao UniversityQingdao 266071China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Proton exchange membrane fuel cells(PEMFCs)have received a sustained world-wide attention owing to their promising applications based on clean ***,their widespread applications are still restricted by the sluggish oxygen reduction reaction(ORR)*** the past decades,significant efforts have been devoted to developing efficient ORR catalysts,which have been summarized in numerous previous ***,most of them mainly focused on ORR activity on the rotating disk electrode(RDE)level,which cannot truly represent the performance in real *** and showcasing efficient catalysts evaluated at the membrane electrode assembly(MEA)level is of vital *** this review,we first briefly showcased the recent development of ORR catalysts and then put more emphasis on the discussion of designing efficient catalysts at MEA and full-cell level,aiming to help stimulate more attention on their practical applications.

关键词： oxygen reduction reaction hydrogen energy membrane electrode assembly proton exchange membrane fuel cells

Exploring the Predominant Factors Influencing the Oxygen Reduction Performance of PtCo/C Catalysts

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Chemical Research in Chinese Universities 2024年第4期40卷 753-760页

作者： LI Jinrong YU Xianghui SUN Qi PENG Yong cao shuang HOU Chun-Chao XU Qiang College of Chemistry and Chemical Engineering Institute for Sustainable Energy and ResourcesQingdao UniversityQingdao266071P.R.China Leibniz Institute for Catalysis e.V. Albert-Einstein-Strasse 29aRostock18059Germany School of Materials Science and Engineering Ocean University of ChinaQingdao266100P.R.China Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials(SKLPM) SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory(SKAEM-JIL)Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of GuangdongDepartment of Chemistry and Department of Materials Science and EngineeringSouthern University of Science and Technology(SUSTech)Shenzhen518055P.R.China

PtCo nanoalloys(NAs)deposited on carbon black are emerging as robust electrocatalysts for addressing the sluggish kinetic issue of oxygen reduction reaction(ORR).However,developing a simple and low-cost method to synthesize PtCo/C with excellent performance is still a great *** this work,a one-pot method was used to successfully obtain the PtCo NAs on commercial carbon supports of acetylene black and Ketjenblack ECP600JD,*** with those grown on Ketjenblack ECP600JD,the PtCo NAs grown on acetylene black exhibited higher electrochemical surface area(ECSA)and mass activity(MA),which may be attributed to the different particle sizes of PtCo NAs,distinct hydrophilicity,electroconductivity and charge distribution between the carbon supports and PtCo *** study provides valuable insights into the optimal design of carbon-supported ORR electrocatalysts with exceptional activity and durability.

关键词： Oxygen reduction reaction PtCo nanoalloy Carbon-supported nanostructure Acetylene black

Effects of combined spinal-epidural anesthesia on anxiety,labor analgesia and motor blocks in women during natural delivery

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World Journal of Psychiatry 2023年第11期13卷 838-847页

作者： Ling Cai Jiao-Jiao Jiang Ting-Ting Wang shuang cao Department of Anesthesiology Shanghai Changning Maternity&Infant Health HospitalShanghai 200050China

BACKGROUND The background of this study was analgesia in natural *** combined spinal-epidural anesthesia has obvious analgesic effect on the parturients in natural labor,and combined spinal-epidural anesthesia has been widely used in anesthesia for various *** To study the effects of combined spinal-epidural anesthesia on anxiety,labor analgesia,and motor blocks in parturients during natural *** A total of 120 women who gave birth at Changning District Maternal and Child Health Hospital between December 2021 to December 2022 were included;a random number table approach was employed to divide the women into a control group and a joint group,with each group consisting of 60 *** control group was given epidural anesthesia,while the joint group was given combined spinal-epidural *** visual analog scale(VAS)was used to evaluate the degree of maternal *** were made between the two groups’conditions of childbirth and the duration of *** scores were used to evaluate the status of the newborns at birth;Self-rating Anxiety Scale(SAS)and General Self-Efficacy Scale(GSES)scores,umbilical artery blood gas analysis indices and stress indices were compared between the two groups;and the frequencies of motor block and postpartum complications were *** In comparison to the control group,in the joint group,the VAS scores for the first,second,and third stages of labor were lower(P0.05).The second and third stages of labor in the joint group were shorter than those in the control group(P<0.05).When compared to the control group,the postpartum SAS score of the joint group was lower,while the GSES score was g

关键词： Combined spinal-epidural anesthesia Natural delivery Anxiety level Labor analgesia Motor block