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Self-organization of unimolecular micelles in beam stream for functional mesoporous metal oxide nanofibers

Fundamental Research 2022年第5期2卷 776-782页

作者： Chongfei Gu Xiaoshan Fan Guihua Zhu Yuchi Fan Haifeng Wang Tao Zhao Qi Xiao Yuan Fang Xiaopeng Li Wan Jiang Lianjun Wang pengpeng qiu Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China

The use of linear amphiphilic block copolymers as templates is an important method for the preparation of mesoporous materials.However,the obtained assemblies are usually sensitive to synthetic conditions,which impedes the preparation of such mesoporous materials in certain environments.Herein,we report a universal strategy applying an amphiphilic multiarm triblock copolymer in the preparation of mesoporous metal oxide nanofibers(NFs)using one metal oxide(TiO_(2),ZrO_(2),WO_(3),CeO_(2)),or two(TiO_(2)/WO 3,TiO_(2)/ZrO_(2),TiO_(2)/CeO_(2))and three(TiO_(2)/WO_(3)/CuO)metal oxides as composites.The template consists of modified β-cyclodextrin as the center of the macromolecule which is attached sequentially to a block of polystyrene,poly(acrylic acid),and poly(ethylene oxide).Under electrospinning conditions,stable unimolecular micelles are formed and effectively co-assemble with metal ions to form fibrous nanostructures.As indicated by various characterization methods,the synthesized TiO_(2) and its derived composite NFs maintain a straight and continuous fibrous structure after calcination,and TiO_(2) NFs exhibit uniform mesopores of 10.8 nm in diameter and a large Brunauer-Emmett-Teller surface area of 143.3 m^(2)g^(−1).Benefiting from the characteristic structure,still present after modification,Pt-decorated mesoporous TiO_(2) NFs display excellent ability in the visible-light photocatalytic degradation of tetracycline,which is superior to the commercial P25 catalyst.This study reveals a promising strategy for the preparation of fibrous mesoporous metal oxides.

关键词： Unimolecular micelles Self-assembly Electrospinning Mesoporous metal oxides Nanofibers

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Yolk-shell structured Fe@void@mesoporous silica with high magnetization for activating peroxymonosulfate

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Chinese Chemical Letters 2020年第7期31卷 2003-2006页

作者： Bingqian Xu Wan Jiang Lianjun Wang Binota Thokchom pengpeng qiu Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Indian Institute of Technology Guwahati Guwahati 781039India

Sulfate radical anion(SO4*)based Fenton-like reaction have recently received a large quantity of attention owing to their strong oxidative capacity and high selectivity toward organic pollutants.However,the development of a high-efficient catalyst for activation of peroxymonosulfate(PMS)with a fast separation is still challengeable.Herein,magnetic mesoporous silica composites with a yolk-shell structure(Fe@void@mSiO2)have been prepared via a successive coating strategy,followed by a hightemperature in-situ treatment and demonstrated as a high-efficient and fast magnetic separable catalyst for the activation of PMS.The resultant material possesses a well-defined yolk-shell structure with high specific surface area(~495.0 m^2/g),uniform pore size(~6.9 nm)and super large magnetic susceptibility(~105 emu/g).Owing to the unique properties,the material possesses an excellent degradation activity for tetracyclines(TC),which is much higher than the commercialized Zero Valent Iron(ZVI)nanoparticles.Additionally,the catalyst is able to work over a broad pH range and be quickly recycled by using an external magnetic field.This research provides a promising strategy for the synthesis and design of multifunctional catalyst for the Fenton-like process.

关键词： Yolk-shell Magnetic mesoporous silica Fenton-like process PMS activation Tetracyclines

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Ordered mesoporous carbon-silica frameworks confined magnetic mesoporous TiO_(2) as an efficient catalyst under acoustic cavitation energy

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Journal of Materiomics 2020年第1期6卷 45-53页

作者： pengpeng qiu Tao Zhao Jeehyeong Khim Wan Jiang Lianjun Wang Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai201620China School of Civil Environmental and Architectural EngineeringKorea UniversitySeoul136-701Republic of Korea

Herein,we report a biphase stratification strategy that enables the encapsulation of magnetic mesoporous TiO_(2) inside an ordered mesoporous C/SiO_(2) framework.The obtained composites exhibit high surface areas(up to 600 m^(2) g^(-1)),large perpendicular pore sizes(up to 9 nm)and a strong magnetic response(~10.0 emu g^(-1)),presenting significantly enhanced degradation activities toward pentachlorophenol(PCP)and bisphenol-A(BPA)under acoustic cavitation energy.The remarkable performance is ascribed to the synergistic effect from the unique structural modulation:1)The large ordered mesopores favors the mass transfer,2)The mesoporous C/SiO_(2) frameworks promote the adsorption of organic pollutants and enrich them close to the TiO_(2) surface and 3)The special spatial arrangement of different components facilitates the generation of cavitation bubbles,leading to the increase in the overall hydroxyl-radical-production rate.Moreover,owing to the effective confinement,the as-prepared materials possess an excellent stability and durability.More importantly,the catalysts can easily be recovered by a magnet and show an excellent reusability.It is believed that these results could provide an important insight for the development of an efficient,stable and facile recoverable catalyst for the acoustic chemical process.

关键词： Fe_(3)O_(4)@mTiO_(2)@mC/SiO_(2) Acoustic cavitation Magnetic separation Mechanical stability

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Solution-phase synthesis of ordered mesoporous carbon as resonant-gravimetric sensing material for room-temperature H2S detection

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Chinese Chemical Letters 2020年第6期31卷 1680-1685页

作者： Jiawei Ni Tao Zhao Lei Tang pengpeng qiu Wan Jiang Lianjun Wang Pengcheng Xu Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Life and Environmental Sciences Shanghai Normal UniversityShanghai 200234China University of Chinese Academy of Sciences Beijing 100049China

H2S can cause multiple diseases and poses a great threat to human health.However,the precise detection of extremely toxic H2S at room temperature is still a great challenge.Here,a facile solvent evaporation induced aggregating assembly(EIAA)method has been applied for the production of ordered mesoporous carbon(OMCs)in an acidic THF/H2 O solution with high-molecular-weight poly(ethylene oxide)-b-polystyrene(PEO-b-PS)copolymers as the structure-directing agent,formaldehyde and resorcinol as carbon precursors.Along with the continuous evaporation of THF from the mixed solution,cylindrical micelles are formed in the solution and further assemble into highly ordered mesostructure.The obtained OMCs possesses a two-dimensional(2 D)hexagonal mesostructure with uniform and large pore diameter(~19.2 nm),high surface area(599 m2/g),and large pore volume(0.92 cm3/g).When being used as the resonant cantilever gas sensor for room-temperature H2S detection,the OMCs has delivered not only a superior gas sensing performance with ultrafast re s ponse(14 s)and recovery(21 s)even at low concentration(2 ppm)but also an excellent selectivity toward H2S among various common interfering gases.Moreover,the limit of detection is better than 0.2 ppm,indicating its potential application in environmental monitoring and health protection.

关键词： Mesoporous materials Carbon Self-assembly Resonant cantilever gas sensor H2S

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A confined micro-reactor with a movable Fe_(3) O_(4) core and a mesoporous TiO_(2) shell for a photocatalytic Fenton-like degradation of bisphenol A

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Chinese Chemical Letters 2021年第4期32卷 1456-1461页

作者： pengpeng qiu Tao Zhao Xiaohang Zhu Binota Thokchom Jianping Yang Wan Jiang Lianjun Wang Yuchi Fan Xiaopeng Li Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsShanghai 201620China Indian Institute of Technology Guwahati Guwahati 781039India

Photocatalysis and Fenton process are two primary and promising advanced oxidation processes to degrade organic pollutants.However,the practical applications of single photocatalysis and Fenton process are still limited.Introducing one of them into another to form a combined photocatalytic Fentonlike system has shown great potential but still faces challenges in designing a well-tailored catalyst.Herein,a confined photocatalytic Fenton-like micro-reactor catalyst with a movable Fe_(3) O_(4) core and a mesoporous TiO_(2) shell has been constructed via a successive Stober coating strategy,followed by an ultrasound assisted etching method.The resulting micro-reactor possesses well-defined yolk-shell structures with unifo rm mesopores(~4 nm),a large Brunauer-Emmett-Teller(BET) surface area(~166.7 m^(2)/g),a high pore volume(~0.56 cm^(3)/g) and a strong magnetization(~51 emu/g),as well as tunable reactor sizes(20-90 nm).When evaluated for degrading bisphenol A under solar light in the presence of peroxymo no sulfate,the micro-reactor exhibits a superior catalytic degradation perfo rmance with a high magnetic separation efficiency and an excellent recycle ability.The outstanding performance can be attributed to its unique textual structure,which leads to a great syne rgistic effect from the photocatalytic and Fenton-like process.This study gives an important insight into the design and synthesis of an advanced micro-reactor for a combined advanced oxidation processes(AOPs).

关键词： Photocatalytic Fenton-like reaction Yolk-shell Micro-reactor Magnetic Mesoporous

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Controllable synthesis of highly crystallized mesoporous TiO2/WO3 heterojunctions for acetone gas sensing

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Chinese Chemical Letters 2020年第5期31卷 1119-1123页

作者： Changyao Wang Yuhui Li pengpeng qiu Linlin Duan Wei Bi Yan Chen Dingyi Guo Yupu Liu Wei Luo Yonghui Deng Laboratory of Advanced Materials Department of ChemistryShanghai Key Lab of Molecular Catalysis and Innovative MaterialsiChEM and State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China Department of Stomatology Zhongshan HospitalFudan UniversityShanghai 200032China

Mesoporous semiconducting metal oxides(SMOs)heterojunctions are appealing sensors for gas detecting.However,due to the different hydrolysis and condensation mechanism of every metal precursor and the contradiction between high crystallinity and high surface area,the synthesis of mesoporous SMOs heterojunctions with highly o rdered mesostructures,highly crystallized frameworks,and high surface area remains a huge challenge.In this work,we develop a novel"acid-base pair"adjusted solvent evaporation induced self-assembly(EISA)strategy to prepare highly crystallized ordered mesoporous TiO2/WO3(OM-TiO2/WO3)heterojunctions.The WCl6 and titanium isopropoxide(TIPO)are used as the precursors,respectively,which function as the"acid-base pair",enabling the coassembly with the structure directing agent(PEO-b-PS)into highly ordered meso structures.In addition,PEO-b-PS can be converted to rigid carbon which can protect the meso structures from collapse during the crystallization process.The resultant OM-TiO2/WO3 heterojunctions possess primitive cubic mesostructures,large pore size(~21.1 nm),highly crystalline frameworks and surface area(~98 m2/g).As a sensor for acetone,the obtained OM-TiO2/WO3 show excellent re sponse/recovery perfo rmance(3 s/5 s),good linear dependence,repeatability,selectivity,and long-term stability(35 days).

关键词： Mesoporous materials Acetone gas sensing Heterojunctions TiO2 WO3

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磁化混凝机械膜反应器在工业废水处理中的应用研究

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工程技术研究 2024年第4期9卷 103-105页

作者：魏国亮邱朋朋青岛海晏环境技术工程有限公司山东青岛266200

随着我国经济的迅猛发展,工业领域产生的废水量显著提升,若直接排放工业废水,会对自然环境造成较大破坏,严重危害人类的生活与生存环境。所以,排放工业废水前,应采取科学、合理的方式进行废水处理,磁化混凝机械膜是较为常见的一种处理... 详细信息

随着我国经济的迅猛发展,工业领域产生的废水量显著提升,若直接排放工业废水,会对自然环境造成较大破坏,严重危害人类的生活与生存环境。所以,排放工业废水前,应采取科学、合理的方式进行废水处理,磁化混凝机械膜是较为常见的一种处理方式。基于此,文章以某工业企业为研究对象,简单介绍该企业产生的废水情况,随后详细分析了基于磁化混凝机械膜反应器的工业废水厌氧处理工艺及其应用效果。结果显示,磁化混凝机械膜具有良好的去污效果,可大规模推广。

关键词：磁化混凝机械膜反应器工业废水厌氧处理工艺

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基于双延迟深度确定性策略梯度的卫星远程变轨控制

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计算机时代 2023年第11期 90-93页

作者：邱鹏鹏张易诚曹海涛郑君铮浙江理工大学计算机科学与技术学院浙江杭州310018 浙江理工大学信息科学与工程学院

在间断性点火与小脉冲作用下的卫星,实现椭圆轨道转移极具困难。因此引入深度强化学习双延迟深度确定性策略梯度算法(Twin Delayed Deep Deterministic policy gradient algorithm,TD3),实现了卫星的远程变轨控制。首先建立合理的卫星... 详细信息

在间断性点火与小脉冲作用下的卫星,实现椭圆轨道转移极具困难。因此引入深度强化学习双延迟深度确定性策略梯度算法(Twin Delayed Deep Deterministic policy gradient algorithm,TD3),实现了卫星的远程变轨控制。首先建立合理的卫星变轨模型;其次利用TD3算法来模拟卫星点火操作,同时通过设计多种奖励函数引导卫星不断学习,最终到达目标轨道附近;最后通过仿真实验验证了所提TD3算法能够有效控制卫星到达目标轨道附近。

关键词：变轨控制相对运动目标轨道深度强化学习

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基于多元统计方法的穆棱河水质时空分布特征

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黑龙江水利科技 2023年第7期51卷 1-6页

作者：薛世勤王立权李铁男邱朋朋戴韬严黑龙江大学水利电力学院哈尔滨150080 黑龙江省水利科学研究院哈尔滨150080

以黑龙江省穆棱河为研究对象,取5个监测断面进行2021年水质时空分布特征分析。运用多元统计方法和综合水质标识指数识别其时间和空间尺度上的水质污染特征,确定主要污染物来源,并对其进行了综合评价。结果表明:2021年穆棱河水质指标波... 详细信息

以黑龙江省穆棱河为研究对象,取5个监测断面进行2021年水质时空分布特征分析。运用多元统计方法和综合水质标识指数识别其时间和空间尺度上的水质污染特征,确定主要污染物来源,并对其进行了综合评价。结果表明:2021年穆棱河水质指标波动最大的是T、NH3-N、TN和TP。在时间尺度上分为LF(1~5月、11月、12月)、MF(6月、10月)、HF(7~9月)三个时段,其中LF时段主要污染物有机物和营养盐,HF时段主要受到农业和生活污水污染。在空间尺度上,上游团结水库CODMn和NH3-N污染严重,且LF时段WQI为劣Ⅴ类。碱厂桥TP浓度较高,除LF时段外,WQI均为Ⅳ类。其余监测断面水质均达到Ⅲ类水标准,中、下游水质整体好于上游。

关键词：穆棱河水质多元统计分析综合评价

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格宾雷诺镀层质量及铝含量测定试验优化

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水利科学与寒区工程 2018年第7期1卷 5-9页

作者：邱朋朋徐昭巍陶琦黑龙江省水利科学研究院黑龙江哈尔滨150080

格宾雷诺的镀层质量及铝含量是保证其耐久性的重要指标,本文结合试验标准及实际试验工作,对格宾雷诺镀层质量及铝含量的测定试验过程进行适当优化,以便于检测人员提高检测效率及检测结果的准确度。

关键词：格宾雷诺镀层质量铝含量试验优化

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