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Enhanced interfacial charge transfer on Bi metal@defective Bi_(2)Sn_(2)O_(7) quantum dots towards improved full-spectrum photocatalysis:A combined experimental and theoretical investigation

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Chinese Chemical Letters 2024年第6期35卷 507-514页

作者： Huizhong Wu Ruiheng Liang Ge Song Zhongzheng Hu Xuyang Zhang minghua zhou Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

To mitigate the water pollution problem by photocatalytic degradation of typical antibiotics of tetracycline(TC),we prepared defective Bi_(2)Sn_(2)O_7(BSO)quantum dots(QDs)with a full spectral response due to Bi metal deposition,using a one-pot hydrothermal method,labeled as Bi@BSO-OV.The optimized Bi@BSOOV showed 73.4% removal of TC in 1 h under irradiation with a 50 W LED lamp in the wavelength band in the visible-near-infrared(vis-NIR)light,a rate that is substantially greater than that of pure BSO(14.7%).The synergistic interaction of Bi metal and oxygen vacancies(OVs)is crucial to boosting photocatalytic performance.The near-infrared region of the photo-response is extended by the surface plasmon resonance(SPR)effect of Bi metal,enhancing the photocatalytic performance and dramatically raising the efficiency of solar energy utilization.In addition to inducing defect levels in BSO,the OVs also activate the surface adsorbed O_(2) to promote the production of·O_(2)^(-)and ^(1)O_(2).DFT calculations reveal that Bi metal and OVs can mutually tune the charge transfer pathways.On the one hand,Bi metal can act as both a charge transfer bridge and an electron donor to assist charge separation.On the other hand,OVs-induced defect levels allow electrons that leap to the conduction band(CB)to first leap from the valence band(VB)to the defect levels,notably improving interfacial charge separation and transfer.The concept of design executed in this study for altering the catalyst by introducing both OVs and Bi metal can provide a rational design idea and potential insight for improving the photocatalytic activity for environmental applications.

关键词： Bi metal Bi_(2)Sn_(2)O_7 quantum dots Surface plasmon resonance Oxygen vacancies

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Hybrid peroxi-coagulation/ozonation process for highly efficient removal of organic contaminants

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Chinese Chemical Letters 2023年第10期34卷 86-92页

作者： Shasha Li Jinxin Xie Jinyu Gu minghua zhou Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Advanced Water Treatment Technology International Joint Research Center College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Aromatic compounds such as phenols presented widely in coal chemical industry wastewater(CCW)render the treatment facing great challenge due to their biorefractory characteristics and potential risks to the environment and human health.Ozone-based advanced oxidation processes show promising for these pollutants removal,but the mineralization via ozonation alone is unsatisfactory and not cost-effective.Herein,a hybrid peroxi-coagulation/ozonation process(denoted as PCO)was developed using sacrificial iron plate as an anode and carbon black modified carbon felt as cathode in the presence of ozonation.An enhanced phenol removal of∼100%within 20 min and phenol mineralization of∼80%within 60 min were achieved with a low energy consumption of 0.35 kWh/g TOC.In this novel process,synergistic effect between ozonation and peroxi-coagulation was observed,and beside O_(3) direct oxidation,peroxone played a dominant role for phenol removal.In the PCO process,the hydrolyzed Fe species enhanced the generation of reactive oxygen species(ROS),while•OH was dominantly responsible for pollutant degradation.This process also illustrated high resistance to high ionic strength and better performance for TOC removal in real wastewater when compared with ozonation and peroxi-coagulation process.Therefore,this process is more cost-effective,being very promising for CCW treatment.

关键词： Coal chemical industry wastewater Phenol removal Catalytic ozonation Peroxi-coagulation Reactive oxygen species

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FeMo@porous carbon derived from MIL-53(Fe)@MoO_(3) as excellent heterogeneous electro-Fenton catalyst: Co-catalysis of Mo

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Journal of Environmental Sciences 2023年第5期127卷 652-666页

作者： Xuedong Du Wenyang Fu Pei Su Qizhan Zhang minghua zhou Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution Nankai UniversityTianjin 300350China Tianjin Advanced Water Treatment Technology International Joint Research Center College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

An ultra-efficient electro-Fenton catalyst with porous carbon coated Fe-Mo metal(FeMo@PC),was prepared by calcining MIL-53(Fe)@MoO_(3).This FeMo@PC-2 exhibited impressive catalytic performance for sulfamethazine(SMT)degradation with a high turnover frequency value(7.89 L/(g·min)),much better than most of reported catalysts.The mineralization current efficiency and electric energy consumption were 83.2%and 0.03 kWh/gTOC,respectively,at lowcurrent(5mA)and small dosage of catalyst(25.0mg/L).The removal rate of heterogeneous electro-Fenton(Hetero-EF)process catalyzed by FeMo@PC-2 was 4.58 times that of Fe@PC/Hetero-EF process.Because the internal-micro-electrolysis occurred between PC and Fe0,while the co-catalysis of Mo accelerated the rate-limiting step of the Fe^(3+)/Fe^(2+) cycle and greatly improved the H_(2)O_(2)utilization efficiency.The results of radical scavenger experiments and electron paramagnetic resonance confirmed the main role of surface-bound hydroxyl radical oxidation.This process was feasible to remove diverse organic contaminants such as phenol,2,4-dichlorophenoxyacetic acid,carbamazepine and SMT.This paper enlightened the importance of the doped Mo,which could greatly improve the activity of the iron-carbon heterogeneous catalyst derived from metal-organic frameworks in EF process for efficient removal of organic contaminants.

关键词： Metal-organic frameworks derivatives Fe-Mo bimetal Porous carbon Co-catalysis Heterogeneous electro-Fenton

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REGIONAL ASSESSMENT OF SOIL NITROGEN MINERALIZATION IN DIVERSE CROPLAND OF A REPRESENTATIVE INTENSIVE AGRICULTURAL AREA

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Frontiers of Agricultural Science and Engineering 2023年第4期10卷 530-540页

作者： Peng XU minghua zhou Bo ZHU Klaus BUTTERBACH-BAHL Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and EnvironmentChineseAcademyof SciencesChengdu610041China Institute for Meteorology and Climate Research Atmospheric Environmental Research(IMK-IFU)Karlsruhe Institute of Technology(KIT)Garmisch-Partenkirchen 82467Germany

Soil nitrogen mineralization(Nmin)is a key process that converts organic N into mineral N that controls soil N availability to plants.However,regional assessments of soil Nmin in cropland and its affecting factors are lacking,especially in relation to variation in elevation.In this study,a 4-week incubation experiment was implemented to measure net soil Nmin rate,gross nitrification(Nit)rate and corresponding soil abiotic properties in five field soils(A-C,maize;D,flue-cured tobacco;and E,vegetables;with elevation decreasing from A to E)from different altitudes in a typical intensive agricultural area in Dali City,Yunnan Province,China.The results showed that soil Nmin rate ranged from 0.10 to 0.17 mg·kg^(-1)·d^(-1)N,with the highest value observed in field E,followed by fields D,C,B,and A,which indicated that soil Nmin and Nit rates varied between fields,decreasing with elevation.The soil Nit rate ranged from 434.2 to 827.1μg·kg^(-1)·h^(-1)N,with the highest value determined in field D,followed by those in fields E,C,B,and A.The rates of soil Nmin and Nit were positively correlated with several key soil parameters,including total soil N,dissolved organic carbon and dissolved inorganic N across all fields,which indicated that soil variables regulated soil Nmin and Nit in cropland fields.In addition,a strong positive relationship was observed between soil Nmin and Nit.These findings provide a greater understanding of the response of soil Nmin among cropland fields related to spatial variation.It is suggested that the soil Nmin from cropland should be considered in the evaluation of the N transformations at the regional scale.

关键词： cropland gross nitrification rate regulatory factors soil nitrogen mineralization spatial variation

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Efficient removal of tetracycline by H_(2)O_(2) activated with iron-doped biochar: Performance, mechanism, and degradation pathways

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Chinese Chemical Letters 2022年第4期33卷 2105-2110页

作者： Xiang Li Yan Jia Jiajia Zhang Yang Qin Yijia Wu minghua zhou Jianhui Sun School of Environment Henan Normal UniversityKey Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlInternational Joint Laboratory on Key Techniques in Water TreatmentHenan ProvinceHenan Engineering Laboratory of Environmental Functional Materials and Pollution ControlXinxiang 453007China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationTianjin Key Laboratory of Environmental Technology for Complex Trans-Media PollutionTianjin Advanced Water Treatment Technology International Joint Research CenterCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

In this study,novel iron-doped biochar(Fe-BC) was produced using a simple method,and it was used as an H_(2)O_(2)activator for tetracycline(TC) degradation.Generally,iron loading can improve the separation performance and reactivity of biochar(BC).In the Fe-BC/H_(2)O_(2)system,92% of the TC was removed within 30 min with the apparent rate constant(k_(obs)) of 0.155 min^(-1),which was 23.85 times that in the case of the BC/H_(2)O_(2)system(0.0065 min^(-1)).The effects of the H_(2)O_(2) and Fe-BC dosage,initial pH,and TC concentration on the TC removal were investigated.The radical quenching and electron paramagnetic resonance(EPR) measurements demonstrated that the removal of TC using the Fe-BC/H_(2)O_(2)process involved both radical(^(*)OH and O_(2)^(-)) and non-radical pathways(^(1)O_(2) and electron transfer).In addition,the performance of the catalyst was also affected by the persistent free radicals(PFRs) and defective sites on the catalyst.Moreover,the degradation pathways of TC were proposed according to the intermediate products detected by LC-MS and the ecotoxicity of intermediates was evaluated.Finally,the Fe-BC/H_(2)O_(2)showed high resistance to inorganic anions and natural organic matter in aquatic environments.Overall,Fe-BC is expected to be an economic and highly efficient heterogeneous Fenton catalyst for removing the organic contaminants in wastewater.

关键词： Fe-BC Fenton-like Tetracycline Removal mechanisms Degradation pathways

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Recent advances in g-CN-based heterojunction photocatalysts

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Journal of Materials Science & Technology 2020年第21期56卷 1-17页

作者： Yunfeng Li minghua zhou Bei Cheng Yan Shao College of Environmental and Chemical Engineering Xi’an Polytechnic UniversityXi’an710000China Hubei Key Laboratory of Wudang Local Chinese Medicine Research Hubei University of MedicineShiyan 442000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Outpatient Taihe HospitalHubei University of MedicineShiyan 442000China

Semiconductor heterojunction photocatalysts have received much concern due to their great application prospect in solar energy utilization and conversion.Rational construction of heterostructure with two or more semiconductor materials can integrate the advantages of multi-components to simultaneously improve the photo-induced charges separation,extend visible light absorption range and retain the high redox ability of photocatalysts.Recently,constructing of g-C3 N4-based heterostructure has become a hot focus due to the multiple merits of g-C3 N4,such as facile synthesis,high stability,unique optical and electronic characteristics.This review tries to give a comprehensive introduction and provide the possible tendency in design and fabrication of g-C3 N4-based heterojunction photocatalysts,especially in rational synthesis of type-II heterojunction,direct Z-scheme heterojunction,new type of S-scheme heterojunction,p-n heterojunction and Schottky heterojunction.Furthermore,the special charges transfer mechanisms of g-C3 N4-based heterojunctions are discussed and their potential applications in photocatalytic water splitting,photo-degradation of contaminants and photo-reduction of CO2 into fuels are also summarized.Finally,we attempt to propose some crucial issues based on the current research,which should be further investigated and resolved in this interesting research area.

关键词： Photocatalysis g-C3N4 Heterojunction Z-scheme S-scheme

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Recent advances in H_(2)O_(2)-based advanced oxidation processes for removal of antibiotics from wastewater

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Chinese Chemical Letters 2023年第3期34卷 39-48页

作者： Xuechun Wang Jiana Jing minghua zhou Raf Dewil Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution Nankai UniversityTianjin 300350China Tianjin Advanced Water Treatment Technology International Joint Research Center College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Department of Chemical Engineering KU LeuvenJ.De Nayerlaan 5Sint-Katelijne-Waver B-2860Belgium

As important emerging contaminants, antibiotics have caused potential hazards to the ecological environment and human health due to their extensive production and consumption. Among various techniques for removing antibiotics from wastewater, H_(2)O_(2)-based advanced oxidation processes(AOPs) have received increasing attention due to their fast reaction rate and strong oxidation capability. Hence this review critically discusses:(i) Recent research progress of AOPs with the addition of H_(2)O_(2) for antibiotics removal through different methods of H_(2)O_(2) activation;(ii) recent advances in AOPs that can in-situ generate and activate H_(2)O_(2) for antibiotics removal;(iii) H_(2)O_(2)-based AOPs as a combination with other techniques for the degradation and mineralization of antibiotics in wastewater. Future perspectives about H_(2)O_(2)-based AOPs are also presented to grasp the future research trend in the area.

关键词： Advanced oxidation processes H_(2)O_(2)in-situ generation Antibiotics degradation Combined AOPs Wastewater treatment

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LncRNA SNHG4调控牙周膜干细胞成骨分化过程中的miR-152-3p

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中国组织工程研究 2024年第1期28卷 38-43页

作者：周明华胡晓宇河南财经政法大学医院口腔科河南省郑州市450046 平顶山学院附属口腔医院河南省平顶山市467000

背景:研究表明长链非编码RNA核仁小RNA宿主基因4(LncRNA SNHG4)参与了多种炎症性疾病的进展,而关于LncRNA SNHG4对牙周炎治疗过程中人牙周膜干细胞成骨分化的影响尚不明确。目的:探讨LncRNA SNHG4通过调节miR-152-3p对人牙周膜干细胞成... 详细信息

背景:研究表明长链非编码RNA核仁小RNA宿主基因4(LncRNA SNHG4)参与了多种炎症性疾病的进展,而关于LncRNA SNHG4对牙周炎治疗过程中人牙周膜干细胞成骨分化的影响尚不明确。目的:探讨LncRNA SNHG4通过调节miR-152-3p对人牙周膜干细胞成骨分化的影响。方法:从因正畸需要而拔除的前磨牙牙周膜组织中分离出人牙周膜干细胞,将其进行成骨诱导分化0,7,14 d后,qRT-PCR检测Runt相关转录因子2、骨钙素、LncRNA SNHG4及miR-152-3p表达。取第3代人牙周膜干细胞,将其分为NC组、pcDNA组、pcDNA-SNHG4组、inhibitor NC组、miR-152-3p inhibitor组、pcDNA-SNHG4+mimic NC组、pcDNA-SNHG4+miR-152-3p mimic组,qRT-PCR检测各组人牙周膜干细胞中LncRNA SNHG4、miR-152-3p表达,CCK-8法检测细胞增殖情况;比色法检测碱性磷酸酶活性;茜素红染色检测矿化结节形成情况;Western blot检测Runt相关转录因子2、骨钙素、碱性磷酸酶蛋白表达;双荧光素酶报告基因实验验证LncRNA SNHG4与miR-152-3p的关系。结果与结论:①与成骨诱导0 d比较,成骨诱导7,14 d后人牙周膜干细胞中Runt相关转录因子2、骨钙素、LncRNA SNHG4表达升高,miR-152-3p表达降低(P<0.05);②过表达LncRNA SNHG4或抑制miR-152-3p均可提高人牙周膜干细胞的增殖能力及碱性磷酸酶活性、矿化结节形成量和Runt相关转录因子2、骨钙素、碱性磷酸酶的蛋白表达(P<0.05);miR-152-3p mimic减弱了过表达LncRNA SNHG4对人牙周膜干细胞成骨分化的促进作用;LncRNA SNHG4与miR-152-3p存在靶向关系;③结果表明,过表达LncRNA SNHG4可能通过抑制miR-152-3p促进人牙周膜干细胞成骨分化。

关键词：长链非编码RNA 核仁小RNA宿主基因4 牙周膜干细胞成骨分化

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资源分布视角下四川省公共卫生资源配置状况及预测分析

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职业与健康 2024年第9期40卷 1272-1276页

作者：周明华泸州市人民医院行政办公室四川泸州646000

目的分析四川省公共卫生资源配置状况和需求预测,为优化和发展四川省公共卫生资源提供参考依据。方法采用基于熵权法的资源分布指数、卫生资源密度指数分析2011—2020年四川省公共卫生资源配置状况并与全国平均水平进行对比分析,采用灰... 详细信息

目的分析四川省公共卫生资源配置状况和需求预测,为优化和发展四川省公共卫生资源提供参考依据。方法采用基于熵权法的资源分布指数、卫生资源密度指数分析2011—2020年四川省公共卫生资源配置状况并与全国平均水平进行对比分析,采用灰色预测模型GM(1,1)预测四川省公共卫生资源“十四五”期间的需求情况。结果2020年,四川省人均卫生总费用为4830.52元,每千人口卫生技术人员和床位数分别为0.483人和0.167张。2013年以来,四川省公共卫生资源的资源分布指数低于全国平均水平,这说明四川省公共卫生资源配置充足程度要低于全国平均水平。以全国的卫生资源密度指数作为参考标准,四川省卫生技术人员和床位数的缺乏量分别不低于3413人和927张,缺乏比例分别不低于14.15%和8.54%。根据预测,四川省公共卫生资源不断增长,2025年卫生总费用、卫生技术人员和床位数预计分别达到6420.071亿元、47299.274人和16990.614张,相较于2020年的年均增长率分别为9.49%、3.61%和4.06%。结论四川省公共卫生资源配置整体上低于全国平均水平,四川省卫生技术人员和床位数相较于全国还有较大不足,需进一步加强公共卫生资源配置。

关键词：公共卫生资源资源分布指数卫生资源密度指数灰色预测模型GM(1 1) 熵权法

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我国三级公立医院绩效考核结果分析与思考

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中国卫生质量管理 2024年第1期31卷 34-37,48页

作者：周明华泸州市人民医院四川泸州646000

目的对我国三级公立医院绩效考核结果进行分析,为推进三级公立医院高质量发展提供依据。方法运用描述性分析法和对比分析法对2019年—2021年三级公立医院绩效考核结果及发展趋势进行分析。结果出院患者手术占比、微创手术占比、四级... 详细信息

目的对我国三级公立医院绩效考核结果进行分析,为推进三级公立医院高质量发展提供依据。方法运用描述性分析法和对比分析法对2019年—2021年三级公立医院绩效考核结果及发展趋势进行分析。结果出院患者手术占比、微创手术占比、四级手术比例和日间手术占择期手术比例均有所增长;Ⅰ类切口感染率下降,DRG组数中位数逐渐增加;抗菌药物使用强度逐步降低,且明显低于40 DDDs的国家上限要求;门诊预约诊疗率大幅度提升,门诊患者预约后平均等候时间稳中有降;人员支出占业务支出比例稳中有升;副高级以上职称的比例、接收对口支援医院和医联体内医院进修半年以上人员的比例逐步提升。存在的主要问题为三级公立医院发展不均衡,跨省异地就医现象仍然存在,医院管理水平有待进一步提高,患者就医感受和医务人员获得感仍需进一步改善。结论为推进三级公立医院高质量发展,还需进一步提升医疗服务水平;加强医院科学管理,推进管理出效益;激活医务人员积极性,推动以人为本的全面发展。

关键词：三级公立医院绩效考核高质量发展

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