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Efficient Fe（Ⅲ）/Fe（Ⅱ） cycling triggered by MoO2 in Fenton reaction for the degradation of dye molecules and the reduction of Cr（Ⅵ）

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Chinese Chemical Letters 2019年第12期30卷 2205-2210页

作者： Bin Shen Chencheng Dong jiahui ji Mingyang Xing jinlong Zhang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology

There is a relatively low efficiency of Fe(Ⅲ)/Fe(Ⅱ) conversion cycle and H2 O2 decomposition(<30%) in conventional Fenton process,which further results in a low production efficiency of ·OH and seriously restricts the application of ***,we report that the commercial MoO2 can be used as the cocatalyst in Fenton process to dramatically accelerate the oxidation of Lissamine rhodamine B(L-RhB),where the efficiency of Fe(Ⅲ)/Fe(Ⅱ) cycling is greatly enhanced in the Fenton reaction *** the L-RhB solution could be degraded nearly 100% in 1 min in the MoO2 cocatalytic Fenton system under the optimal reaction condition,which is apparently better than that of the conventional Fenton system(~50%).Different from the conventional Fenton reaction where the ’OH plays an important role in the oxidation process,it shows that 1 O2 contributes most in the MoO2 cocatalytic Fenton ***,it is found that the exposed Mo^4+ active sites on the surface of MoO2 powders can greatly promote the rate-limiting step of Fe^3+/Fe^2+ cycle conversion,thus minimizing the dosage of H2 O2(0.400 mmol/L) and Fe^2+(0.105 mmol/L).Interestingly,the MoO2 cocatalytic Fenton system also exhibits a good ability for reducing Cr(Ⅵ) ions,where the reduction ability for Cr(Ⅵ) reaches almost 100% within 2 *** short,this work shows a new discovery for M002 cocatalytic advanced oxidation processes(AOPs),which devotes a lot to the practical water remediation application.

关键词： Fenton reaction Co-catalytic Molybdenum dioxide Fe^3+/Fe^2+conversion Dye wastewater

Research progress of photocatalysis based on highly dispersed titanium in mesoporous SiO_2

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Chinese Chemical Letters 2019年第4期30卷 853-862页

作者： Chencheng Dong jiahui ji Zhe Yang Yifei Xiao Mingyang Xing jinlong Zhang Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology Department of Civil Engineering The University of Hong Kong

With the development of the human economy and green chemistry, people pay much more attention to environmental safety. Correspondingly, mesoporous TiO_2 and its correlated photocatalysts are able to help people seek for better life. In this review, first of all, we briefly introduce the preparations and applications of mesoporous TiO_2-SiO_2 materials, which exhibit excellent performance in pollutants decomposition and H_2 evolution in photocatalysis. Then, we review the mesoporous composites of TiSiO_2 materials, which are ideal materials used in the photoreduction of air pollutants such as CO_2, NO and NO_2. It is powerfully evident from the literature surveys that these TiO_2 based mesoporous photocatalysts possess a large potential in environment and energy development.

关键词： Mesoporous TiO2-SiO2 Ti-SiO2 Photocatalysis Photo-degradation Water splitting CO2 reduction

Sustainable activation of peroxymonosulfate by the Mo(Ⅳ)in MoS_(2) for the remediation of aromatic organic pollutants

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Chinese Chemical Letters 2020年第10期31卷 2803-2808页

作者： Mengmeng Du Qiuying Yi jiahui ji Qiaohong Zhu Huan Duan Mingyang Xing jinlong Zhang Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry&Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China

Although MoS_(2) has been proved to be a very ideal cocatalyst in advanced oxidation process(AOPs),the activation process of peroxy mono sulfate(PMS)is still inseparable from metal ions which inevitably brings the risk of secondary pollution and it is not conducive to large-scale industrial *** this study,the commercial MoS_(2),as a durable and efficient catalyst,was used for directly activating PMS to degrade aromatic organic *** commercial MoS_(2)/PMS catalytic system demonstrated excellent removal efficiency of phenol and the total organic carbon(TOC)residual rate reach to 25%.The degradation rate was significantly reduced if the used MoS_(2) was directly carried out the next cycle experiment without any ***,the commercial MoS_(2) after post-treated with H2 O_(2) can exhibit good stability and recyclability for cyclic degradation of ***,the mechanism for the activation of PMS had been investigated by density functional theory(DFT)*** renewable Mo4+exposed on the surface of MoS_(2) was deduced as the primary active site,which realized the direct activation of PMS and avoided secondary *** into account the reaction cost and efficient activity,the development of commercial MoS_(2) catalytic system is expected to be applied in industrial wastewater.

关键词： Peroxymoosulfate Molybdenum disulfide Surface reaction Recyclability Sulfur vacancies Density functional theory

"Small amount for multiple times" of H_(2)O_(2) feeding way in MoS_(2)-Fex heterogeneous fenton for enhancing sulfadiazine degradation

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Chinese Chemical Letters 2022年第3期33卷 1365-1372页

作者： Zhuan Chen Cheng Lian Kai Huang jiahui ji Qingyun Yan jinlong Zhang Mingyang Xing Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237China

In recent years, MoS_(2) catalyzed/cocatalyzed Fenton/Fenton-like systems have attracted wide attention in the field of pollution control, but there are few studies on the effect of H_(2)O_(2) feeding way on the whole Fenton process. Here, we report a new type of composite catalyst (MoS_(2)-Fe_(x)) prepared in a simple way with highly dispersed iron to provide more active sites. MoS_(2)-Fe_(x) was proved to possess selectivity for singlet oxygen (^(1)O_(2)) in effectively degrading sulfadiazine with a wide pH adaptability (4.0~10.0). Importantly, the mechanism of the interaction between H_(2)O_(2) and MoS_(2) on the Fenton reaction activity was revealed through the combination of experiment and density functional theory (DFT) calculations. Compared to the traditional “a large amount for one time” feeding way of H_(2)O_(2), the “small amount for multiple times” of H_(2)O_(2) feeding way can increase the degradation rate of sulfadiazine from 36.9% to 91.1% in the MoS_(2)-Fe_(x) heterogeneous Fenton system. It is demonstrated that the “small amount for multiple times” of H_(2)O_(2) feeding way can reduce the side reaction of decomposition of H_(2)O_(2) by MoS_(2) and effectively improve the utilization rate of H_(2)O_(2) and the stability of MoS_(2)-Fe_(x). Compared with Fe_(2)O_(3)^(-)based Fenton system, MoS_(2)-Fe_(x) can significantly save the amount of H_(2)O_(2). Compared with nano-iron powder, the formation of iron sludge in MoS_(2)-Fe_(x) system was significantly reduced. Furthermore, long-term degradation test showed that the MoS_(2)-Fe75/H_(2)O_(2) system could maintain the effectiveness of degrading organic pollutants for 10 days (or even longer). This study has a guiding significance for the large-scale treatment of industrial wastewater by improved Fenton technology in the future.

关键词： Fenton reaction Co-catalytic Molybdenum sulfide Hydrogen peroxide Singlet oxygen

Defect electrons accelerate iron cycle of novel Fe-based Fenton:Long-term effective quinoline degradation

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Chinese Chemical Letters 2023年第6期34卷 598-605页

作者： Weikang Hu Ming Yang Qingyun Yan jiahui ji Yan Bao jinlong Zhang Mingyang Xing Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237China

Heterogeneous Fenton has been widely used in the disposal of organic pollutants,however,slow regeneration of≡Fe(II)remains limitation for its practical application of long-term ***,we come up with a novel Fe-based heterogeneous Fenton catalyst named as FeS_(x)O_(y)-X(X is the ratio of ethylene glycol to N,N-dimethylformamide).With the help of the abundant defect electrons in Sulfur vacancies,≡Fe(Ⅱ)regeneration on the surface of FeS_(x)O_(y)-1:1 was accelerated,resulting in a stable proportion of≡Fe(Ⅱ)on the surface,which maintained continuously stable generation of hydroxyl radical(·OH)and singlet oxygen(^(1)O_(2)).Thus,without any organic reagents or cocatalysts,FeS_(x)O_(y)-1:1 based Fenton system achieved effective long-term degradation of 560 mg/L quinoline within only 7 days,which was evidently better than reported Fe S and SV-Fe S_(2)(SV:Sulfur vacancy).The system had excellent adaptability to water quality and the COD removal rate of biochemical wastewater was as high as 79.8%.

关键词： Fenton reaction Quinoline Defect electron Iron cycle Heterogeneous catalyst

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

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Transactions of Tianjin University 2021年第2期27卷 110-126页

作者： Yan Bao Qingyun Yan jiahui ji Bocheng Qiu jinlong Zhang Mingyang Xing Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China jiangsu Key Laboratory of Pesticide Sciences Department of ChemistryCollege of SciencesNanjing Agricultural UniversityNanjing 210095China

Water pollution is a global environmental issue with multi-dimensional infl uences on human *** strategies,such as photo-Fenton reaction,have been employed to remove recalcitrant ***-dimensional(2D)graphene and its threedimensional(3D)confi gurations have attracted considerable attention as emerging carbon-based catalysts in photo-Fenton fi elds owing to their alluring properties in electron transfer,reactant adsorption,and light *** review summarizes the recent developments in 2D and 3D graphene-based catalysts for photo-Fenton *** structures,characteristics,activity,and mechanisms are *** conclusions and outlooks are proposed for the profound understanding of challenges and future directions.

关键词： Photo-Fenton Graphene Pollutant control Aerogel Hydrogel

基于麻雀搜索算法的区域微电网多目标协同优化调度

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电工技术 2024年第2期 112-114,117页

作者：祝锦发林建丰黄思奇季嘉辉林培桂广东电网有限责任公司汕尾供电局广东汕尾516600

当前的区域微电网多目标协同优化调度矩阵一般为单向的处理形式,虽然能够实现简单的调度优化目标,但是对于调度范围存在一定的限制,导致交互功率降低,为此提出对基于麻雀搜索算法的区域微电网多目标协同优化调度方法的设计与验证分析。... 详细信息

当前的区域微电网多目标协同优化调度矩阵一般为单向的处理形式,虽然能够实现简单的调度优化目标,但是对于调度范围存在一定的限制,导致交互功率降低,为此提出对基于麻雀搜索算法的区域微电网多目标协同优化调度方法的设计与验证分析。根据实际优化调度需求及标准的变化,先进行约束条件的设置,同时测算出对应的目标函数。采用多阶的模式,扩大实际的调度范围,并设计多阶并网协同运行调度矩阵,以此为基础,构建麻雀搜索算法下微电网协同优化调度模型,并采用横纵交叉的处理方式实现优化调度。经过6:00、12:00、18:00以及24:004个时刻的调度研究,在麻雀搜索算法的辅助下,优化完成之后,微电网的交互功率逐渐保持平稳,并未出现较为明显的波动,交互功率基本控制在70 kW以下,说明此种调度优化方式的针对性较强,调度的效率较高,可以确保微电网在运行的过程中保持平稳,具有实际的应用价值。

关键词：麻雀搜索算法区域微电网多目标执行协同优化优化调度电网控制

In situ studies on ceria promoted cobalt oxide for CO oxidation

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Chinese Journal of Catalysis 2019年第5期40卷 656-663页

作者： Weiwei Huan jie Li jiahui ji Mingyang Xing Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass Zhejiang A&F UniversityLin'an 311300ZhejiangChina Zhejiang provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing Hangzhou 310023ZhejiangChina Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Scienceand TechnologyShanghai 200237China

In situ studies of catalysts play valuable roles in observing phase transformation, understanding the corresponding surface chemistry and the mechanism of the reaction. In this paper, ceria promoted cobalt oxide was prepared by the calcination method and investigated for the CO oxidation. The microstructure and morphology of CeO2-Co3O4 were investigated by the Scanning Electron Microscope, High-resolution transmission electron microscopy, Raman and X-ray photoelectron spectroscopy characterization. The effect of CeO2 doping on Co3O4 for CO oxidation was characterized by in situ X-ray Diffraction (in situ XRD) and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS). In situ XRD was carried out under H2 atmosphere to evaluate the redox property of catalysts. The results indicated that the ceria doping can enhance the reducibility of Co2+ and promote the Co3+-Co2+-Co3+ cycle, owing to the oxygen replenish property of CeO2. Furthermore, adsorbed carbonate species on the surface of CeO2-Co3O4 were investigated by in situ-DRIFTS experiment. It was turned out that carbonate species on ceria promoted cobalt oxide catalysts showed different IR peaks compared with pure cobalt oxide. The carbonate species on ceria promoted catalyst are more active, and similar to free state carbonate species with weak bonding to catalyst surface, which can effectively inhibit catalyst inactivation. This study revealed the mechanism of ceria promoting CO oxidation over cobalt oxide, which will provide theoretical support for the design of efficient CO oxidation catalysts.

关键词： CeO2-Co3O4 CO oxidation In situ X-ray diffraction In situ diffuse reflectance infrared Fourier transform spectroscopy Carbonate species

积雪草苷对离体大鼠胸主动脉的舒张作用及其机制

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南方医科大学学报 2024年第3期44卷 523-532页

作者：卢国庆孙红燕孙正宇刘乐强王磊张宁宁王宇航何一鸣纪佳慧李馨月康品方唐碧蚌埠医科大学第一附属医院心血管内科安徽蚌埠233000 蚌埠医科大学心脑血管病研究中心生理学教研室安徽蚌埠233000 蚌埠医科大学临床医学院安徽蚌埠233000

目的研究积雪草苷降血压和对大鼠胸主动脉的舒张作用及机制。方法将SD大鼠分为正常对照组、积雪草苷低剂量组(50 mg/kg)和积雪草苷高剂量组(100 mg/kg),6只/组,治疗组每日予以积雪草苷对应剂量灌胃处理,分别在给药前1 d、给药第8天和给... 详细信息

目的研究积雪草苷降血压和对大鼠胸主动脉的舒张作用及机制。方法将SD大鼠分为正常对照组、积雪草苷低剂量组(50 mg/kg)和积雪草苷高剂量组(100 mg/kg),6只/组,治疗组每日予以积雪草苷对应剂量灌胃处理,分别在给药前1 d、给药第8天和给药第15天测大鼠尾动脉收缩压,HE染色评估大鼠胸主动脉血管组织形态变化。取大鼠胸主动脉血管环,以舒张血管百分比为指标,考察不同浓度积雪草苷对基础状态血管环、去甲肾上腺素(NE,1×10-6 mol/L)及氯化钾(KCl,60 mmol/L)收缩的内皮保留或去内皮胸主动脉血管环的舒张作用;对内皮保留的血管环,分别以左旋硝基精氨酸甲酯(0.1 mmol/L)、吲哚美辛(1×10-5 mol/L)、锌原卟啉Ⅸ(10µmol/L)和6种钾离子通道阻滞剂:四乙基氯化铵(5 mmol/L)、格列苯脲(1×10-5 mol/L)、氯化钡(0.1 mmol/L)、Iberiotoxin(0.1μmol/L)、4-氨基吡啶(0.1 mmol/L)、TASK-1-IN-1(1×10-5 mol/L)预孵育血管环,加NE(1×10-6 mol/L)预收缩,考察不同浓度积雪草苷对血管环的舒张作用;以血管收缩百分率为指标,在无钙条件下,分别以KCl(60 mmol/L)、NE(1×10-6 mol/L)刺激血管,再分别累积加入CaCl2(0.1、0.3、1、3、10 mmol/L),考察积雪草苷对CaCl2导致外钙内流及内钙释放引起的血管收缩的影响。结果与正常对照组相比,积雪草苷50和100 mg/kg组大鼠收缩压降低(P0.05),四乙基铵、Iberiotoxin和左旋硝基精氨酸甲酯均可抑制积雪草苷对NE预收缩血管环的舒张作用(P<0.05)。在无钙条件下,血管环经KCl、NE作用,积雪草苷能抑制CaCl2导致外钙内流、内钙释放引起的收缩(P<0.01)。结论积雪草苷通过介导高电导钙激活性钾离子通道开放、促进内皮细胞一氧化氮释放并调节钙离子内外流诱导大鼠胸主动脉舒张,从而降低大鼠收缩压。

关键词：积雪草苷降压舒张血管钾通道钙通道