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Peroxymonosulfate activation based on Co_(9)S_(8)@N-C:A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater

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Journal of Materials Science & Technology 2022年第32期127卷 256-267页

作者： Caiyan Gao xuezhen feng Lian Yi Xiaoyong Wu Renji Zheng Gaoke Zhang Yubiao Li School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

Formaldehyde(FA),as an important chemical raw material,has been widely used in many ***,the discharge of a large amount of FA-containing wastewater poses a serious threat to the environment and human ***,the in-situ hydrogen energy release technology of hydrogen-containing stable liquid has been extensively explored due to its safe *** a robust method to achieve FA removal and synchronous in-situ hydrogen release from FA containing wastewater is of great significant for environmental protection and energy crisis ***,we have innovatively introduced peroxymonosulfate(PMS)activation technology into FA removal and hydrogen production *** composite of nitrogen doped carbon coating Co_(9)S_(8)nanotubes(Co_(9)S_(8)@N-C)is employed as a proof of concept for FA decomposition and simultaneously hydrogen production based on PMS activation *** expected,the Co_(9)S_(8)@N-C/PMS system presents much superior hydrogen production efficiency and satisfactory FA removal rate towards FA wastewater than those of common catalysis,photocatalysis and Fenton reaction in the basic condition in a wide range of FA *** hydrogen yield reaches a value as high as 471μmol within 60 min,corresponding to a FA degradation rate of 30%with an initial FA concentration of 0.722 mol L^(-1).Characterizations and density functional theory(DFT)calculations suggest that the free radical process dominated by superoxide radical(O_(2)·^(-))and nonradical process dominated by singlet oxygen(^(1)O_(2)),which are induced by Co_(9)S_(8)@N-C/PMS system,are responsible for highly efficient hydrogen production via FA *** generated O_(2)·^(-)and ^(1)O_(2)can extract·H from FA to form·OOH intermediate,which can further combine with the·H from water to produce *** study provides an applicable technique for environmental purification and new energy development based on FA containing wastewater.

关键词： Peroxymonosulfate activation Co9S8@N–C Hydrogen evolution Formaldehyde removal

Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite on heavy metal-polluted red soil

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 105-114页

作者： Jing Li Dazhong Yang Wensong Zou xuezhen feng Ranhao Wang Renji Zheng Siyuan Luo Zheting Chu Hong Chen State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Red soil,the most critical soil resource in tropical/subtropical regions worldwide,faces tremendous threats,including nutrient deficiency,acidification,and heavy metal *** is a great demand for multifunctional eco-materials capable of modifying this ***,we used widely distributed soil and biomass to develop a zeolite/biochar composite for synergistic red soil remediation and *** the composite material,the Pb^(2+) and Cd^(2+) remediation efficiencies reached 92.8%and 92.9%,respectively,in stems under optimal ***,the acidity and nutrient deficiency conditions of red soil significantly *** atomic-scale interaction mechanism during the remediation and amendment process was elucidated with complementary characterization methods,which revealed that in the zeolite/biochar composite material,zeolite contributes to longterm heavy metal remediation ***,biochar is responsible for soil quality amendment and short-term heavy metal ***,for the first time,single-atom heavy metal ions were observed on biochar during the remediation process,indicating the broad distribution of single atoms in the natural environment.

关键词： Red soil Heavy metal pollution Zeolite/biochar composite Soil remediation Soil amendment

Bandgap engineering of tetragonal phase CuFeS_(2)quantum dots via mixed-valence single-atomic Ag decoration for synergistic Cr(VI)reduction and RhB degradation

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Chinese Chemical Letters 2021年第11期32卷 3450-3456页

作者： Yangzi Shangguan Yuanhao Zhou Renji Zheng xuezhen feng Qiuyue Ge Ranhao Wang Dazhong Yang Wenfei Wei Xiaoyong Wu Jia Lin Hong Chen Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Hubei Key Laboratory of Mineral Resources Processing and Environment School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070China

Bandgap engineering through single-atom site binding on semiconducting photocatalyst can boost the intrinsic activity,selectivity,carrier separation,and electron ***,we report a mixed-valence Ag(0)and Ag(I)single atoms co-decorated semiconducting chalcopyrite quantum dots(Ag/CuFeS_(2)QDs)*** demonstrates efficient photocatalytic performances for specific organic dye(rhodamine B,denoted as RhB)as well as inorganic dye(Cr(VI))removal in water under natural sunlight *** RhB degradation and Cr(VI)removal efficiencies by Ag/CuFeS_(2)QDs were 3.55 and 6.75 times higher than those of the naked CuFeS_(2)QDs at their optimal pH conditions,***,in a mixture of RhB and Cr(VI)solution under neutral condition,the removal ratio has been elevated from 30.2%to 79.4%for Cr(VI),and from 95.2%to 97.3%for RhB degradation by using Ag/CuFeS_(2)QDs after 2 h sunlight *** intrinsic mechanism for the photocatalytic performance improvement is attributed to the narrow bandgap of the single-atomic Ag(I)anchored CuFeS_(2)QDs,which engineers the electronic structure as well as expands the optical light response ***,the highly active Ag(0)/CuFeS_(2)and Ag(I)/CuFeS_(2)effectively improve the separation efficiency of the carriers,thus enhancing the photocatalytic *** work presents a highly efficient single atom/QDs photocatalyst,constructed through bandgap engineering via mixed-valence single noble metal atoms binding on semiconducting *** paves the way for developing high-efficiency single-atom photocatalysts for complex pollutions removal in dyeing wastewater environment.

关键词： Single-atom catalysts Bandgap engineering Cr(VI)reduction Organic pollutants degradation Dyeing wastewater treatment

Selective CO_(2) photoreduction to CH_(4) mediated by dimension-matched 2D/2D Bi_(3)NbO_(7)/g-C_(3)N_(4) S-scheme heterojunction

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Chinese Journal of Catalysis 2022年第2期43卷 246-254页

作者： Kai Wang xuezhen feng Yangzi Shangguan Xiaoyong Wu Hong Chen Hubei Key Laboratory of Pollutant Analysis and Reuse Technology College of Urban and Environmental SciencesHubei Normal UniversityHuangshi 435002HubeiChina School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070HubeiChina School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Discovering highly selective catalysts is key to achieve effective CO_(2) photoreduction to hydrocarbon *** this work,we construct an ultrathin dimension-matched S-scheme Bi_(3)NbO_(7)/g-C_(3)N_(4) heterostructure,which permits the highly selective photocatalytic reduction of CO_(2) to CH_(4),as shown by 13C isotopic *** functional theory calculations combined with solid-state characterization confirm the electron transfer from g-C_(3)N_(4) nanosheets to Bi_(3)NbO_(7),establishing an internal electric *** internal electric field drives photogenerated electrons from Bi_(3)NbO_(7) to g-C_(3)N_(4),as revealed by in-situ X-ray photoelectron spectroscopy,demonstrating the presence of an S-scheme charge transfer path in Bi_(3)NbO_(7)/g-C_(3)N_(4) heterostructures allowing efficient and selective CO2 *** a result,the optimized sample achieved a CH_(4) evolution rate of 37.59μmol·g^(-1)·h^(-1),a ca.15-fold enhancement compared to ultrathin g-C_(3)N_(4) nanosheets,and also retained stability after 10 reaction cycles and 40 h of simulated solar irradiation with no sacrificial *** optimized Bi3 Nb O7/g-C_(3)N_(4) composites achieve almost 90%selectivity for CH_(4) production over CO.

关键词： Dimension-matched S-scheme Photocatalysis CO_(2)reduction Selectivity

Exploration of the “Four-Three-Four” Internship and Training Mode in Higher Vocational Colleges Under the Modern Vocational Education System

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Journal of Contemporary Educational Research 2024年第3期8卷 111-117页

作者： Jifeng Liu Na Han Xiaojiao Li Jing Wang xuezhen feng Shandong Maritime Vocational College Weifang 261108Shandong ProvinceChina College of Educational Sciences Xinjiang Normal UniversityUrumqi 830017Xinjiang Uygur Autonomous RegionChina Weifang City Government Kindergarten Weifang 261041Shandong ProvinceChina

This article mainly introduces the innovative internship and training model of vocational colleges,including five aspects such as“four-party collaboration,three-stage progression,four-way integration,value-added evaluation,and double selection and promotion.”The model aims to improve students’practical skills and professional quality to better adapt to market demand and social *** article also presents the prospects of the future internship and training model,including strengthening cooperation and communication with industry enterprises,focusing on students’personalized development and practical skill cultivation,and establishing a scientific and objective evaluation and feedback mechanism.

关键词： Four-party collaboration Three-stage progression Four-way integration Value-added evaluation Double selection and promotion

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紫菜多糖硫酸化修饰及生物活性分析

食品工业科技 2024年第1期45卷 192-198页

作者：李瑶熊欣琪徐畅冯学珍冯书珍广西科技大学医学部广西柳州545006 广西科技大学理学院广西柳州545006

以紫菜为原料,采用微波辅助酶法制备紫菜多糖,浓硫酸法合成硫酸化紫菜多糖,通过单因素及正交试验对紫菜多糖硫酸化修饰工艺条件进行优化,利用傅里叶红外光谱仪鉴定修饰结果,并比较浓硫酸法与氯磺酸-吡啶法对硫酸化多糖抗氧化与降血糖活... 详细信息

以紫菜为原料,采用微波辅助酶法制备紫菜多糖,浓硫酸法合成硫酸化紫菜多糖,通过单因素及正交试验对紫菜多糖硫酸化修饰工艺条件进行优化,利用傅里叶红外光谱仪鉴定修饰结果,并比较浓硫酸法与氯磺酸-吡啶法对硫酸化多糖抗氧化与降血糖活性的影响。结果表明:浓硫酸法进行硫酸化的最佳条件为料液比1:80 g/mL,紫菜多糖与硫酸铵质量比10:9 g/g,反应时间33 min,最高取代度为2.94;红外光谱指征修饰后的紫菜多糖在801、1123 cm^(-1)处有硫酸基团的特征吸收峰,硫酸基团的可能取代位置为C-6;硫酸化后的紫菜多糖对DPPH、O_(2)^(-)和OH自由基的清除作用及α-葡萄糖苷酶的抑制作用均显著高于硫酸化前(P<0.05);浓硫酸法修饰紫菜多糖的抗氧化活性及降血糖活性均显著高于氯磺酸-吡啶法(P<0.05),说明浓硫酸法更适用于紫菜多糖的硫酸化修饰。研究结果为开展食源性紫菜多糖的进一步利用提供了参考。

关键词：紫菜多糖硫酸化抗氧化活性降血糖活性

新加坡学前融合教育发展的历史经验及其对我国的启示

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学前教育研究 2023年第6期 70-82页

作者：冯学珍关文军新疆师范大学教育科学学院乌鲁木齐830017

新加坡学前融合教育大致走过了萌芽、初步探索和全面深化三个发展阶段。在全面深化阶段,新加坡学前融合教育迅速调整理念,不断完善政策,增加经费投入,注重早期干预,加强教师培养,为学前融合教育的高质量发展注入了强劲动力。新加坡学前... 详细信息

新加坡学前融合教育大致走过了萌芽、初步探索和全面深化三个发展阶段。在全面深化阶段,新加坡学前融合教育迅速调整理念,不断完善政策,增加经费投入,注重早期干预,加强教师培养,为学前融合教育的高质量发展注入了强劲动力。新加坡学前融合教育总体呈现出理念更新与政策及时跟进、“托底+专项资助”的经费保障、早期干预和学前融合有机衔接以及系统化的学前融合教师培养等特点。参照新加坡学前融合教育的发展经验,我国学前融合教育可以从转变社会公众对待残疾的观念、加快学前教育立法进程、强化政府在学前融合教育投入中的主导和主体作用、推动特殊儿童早期干预和学前融合有机衔接以及构建系统的学前融合教育师资培养和培训体系等方面做出努力和改进。

关键词：新加坡学前融合教育特殊教育早期干预

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磷酸化裙带菜多糖的制备及结构表征和生物活性分析

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食品科学 2024年第7期45卷 35-42页

作者：李瑶熊彩明张佳乐冯学珍冯书珍广西科技大学医学部广西柳州545006 广西科技大学理学院广西柳州545006

以磷酸盐作为交联剂对分离纯化的裙带菜多糖进行磷酸化修饰,综合运用紫外吸收光谱、傅里叶变换红外光谱、基质辅助激光解吸电离飞行时间质谱、高碘酸氧化及Smith降解法、刚果红实验、β-消去反应、碘-碘化钾实验进行结构表征,并评价修... 详细信息

以磷酸盐作为交联剂对分离纯化的裙带菜多糖进行磷酸化修饰,综合运用紫外吸收光谱、傅里叶变换红外光谱、基质辅助激光解吸电离飞行时间质谱、高碘酸氧化及Smith降解法、刚果红实验、β-消去反应、碘-碘化钾实验进行结构表征,并评价修饰前后的自由基清除能力和降血糖活性。结果表明:磷酸根的取代度为9.26,在1216、886 cm^(-1)处出现P=O、P—O—C磷酸基团特征吸收峰,表明磷酸化修饰成功;磷酸化裙带菜多糖的最大相对分子质量为94.4×10^(3),具有三股螺旋结构,是β-糖苷键连接的吡喃型葡聚糖,其中,多糖与氨基酸主要通过—O—型糖肽键相连;单糖之间的连接方式主要为1→3、1→2,1→4和1→6型糖苷键,物质的量比为0.494∶0.504∶0.002,且具有分支结构;磷酸化修饰后的裙带菜多糖对1,1-二苯基-三硝基苯肼自由基、超氧阴离子自由基(O2-·)和羟自由基(·OH)的清除率及α-葡萄糖苷酶的抑制率分别比修饰前显著提高34.76%、12.30%、76.05%和3.70%(P<0.05),说明磷酸化修饰对裙带菜多糖自由基清除能力和降血糖活性具有促进作用。

关键词：磷酸化裙带菜多糖结构表征生物活性

新加坡特殊需要儿童早期干预和学前融合教育联动发展的经验与启示——基于《加强对有特殊需要儿童的包容和支持》方案的分析

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中国特殊教育 2024年第9期 88-96页

作者：冯学珍关文军新疆师范大学教育科学学院乌鲁木齐830017 潍坊市机关幼儿园潍坊261000

为更好地实现包容性发展的社会愿景,新加坡不断完善0~6岁特殊需要儿童的早期干预支持服务体系。2021年,新加坡实施了《加强对有特殊需要儿童包容和支持》方案。该方案进一步完善了新加坡早期干预支持的两项内容共7项建议,配套制定了相... 详细信息

为更好地实现包容性发展的社会愿景,新加坡不断完善0~6岁特殊需要儿童的早期干预支持服务体系。2021年,新加坡实施了《加强对有特殊需要儿童包容和支持》方案。该方案进一步完善了新加坡早期干预支持的两项内容共7项建议,配套制定了相应的实施策略,包括完善的政策法规体系、专业的师资团队以及多元主体参与支持体系,呈现出旨归融合、重视教师团队建设、系统支持等特点。参照新加坡的发展经验,我国可以从推进特殊需要儿童早期干预和学前融合教育的有序衔接、加强特殊需要儿童早期干预和学前融合师资队伍的建设和培养以及搭建多维贯通的学前融合教育支持保障体系等方面做出必要改进。

关键词：特殊需要儿童早期干预支持融合