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| 1 | Controllable synthesis of highly crystallized mesoporous TiO2/WO3 heterojunctions for acetone gas sensing显示文摘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). | Changyao Wang Yuhui Li Pengpeng Qiu Linlin Duan Wei Bi Yan Chen Dingyi Guo Yupu Liu Wei Luo Yonghui Deng | 2020 | Chinese Chemical Letters2020，31，5： | 4 |
| 2 | Ordered mesoporous carbon-silica frameworks confined magnetic mesoporous TiO_(2) as an efficient catalyst under acoustic cavitation energy显示文摘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. | Pengpeng Qiu Tao Zhao Jeehyeong Khim Wan Jiang Lianjun Wang Wei Luo | 2020 | Journal of Materiomics2020，6，1： | 2 |
| 3 | Self-organization of unimolecular micelles in beam stream for functional mesoporous metal oxide nanofibers显示文摘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. | 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 | 2022 | Fundamental Research2022，2，5： | 1 |
| 4 | Solution-phase synthesis of ordered mesoporous carbon as resonant-gravimetric sensing material for room-temperature H2S detection显示文摘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. | Jiawei Ni Tao Zhao Lei Tang Pengpeng Qiu Wan Jiang Lianjun Wang Pengcheng Xu Wei Luo | 2020 | Chinese Chemical Letters2020，31，6： | 1 |
| 5 | A novel cop per( II ) complex bearing salicylaldimine immobilized on SBA-15 and its catalytic performances in styrene oxidation by hydrogen peroxide显示文摘 | Yang Ying Hao Shijie Qiu Pengpeng | 2010 | React Kinet Mech Catal2010，100，： | 1 |
| 6 | Distance-controllable and direction-steerable opto-conveyor for targeting delivery显示文摘Opto-conveyors have attracted widespread interest in various fields because of their non-invasive and non-contact delivery of micro/nanoparticles.However,the flexible control of the delivery distance and the dynamic steering of the delivery direction,although very desirable in all-optical manipulation,have not yet been achieved by optoconveyors.Here,using a simple and cost-effective scheme of an elliptically focused laser beam obliquely irradiated on a substrate,a direction-steerable and distance-controllable opto-conveyor for the targeting delivery of microparticles is implemented.Theoretically,in the proposed scheme of the opto-conveyor,the transverse and longitudinal resultant forces of the optical gradient force and the optical scattering force result in the transverse confinement and the longitudinal transportation of microparticles,respectively.In this study,it is experimentally shown that the proposed opto-conveyor is capable of realizing the targeting delivery for microparticles.Additionally,the delivery distance of microparticles can be flexibly and precisely controlled by simply adjusting the irradiation time.By simply rotating the cylindrical lens,the proposed opto-conveyor is capable of steering the delivery direction flexibly within a large range of azimuthal angles,from-75°to 75°.This study also successfully demonstrated the real-time dynamic steering of the delivery direction from-45°to 45°with the dynamical rotation of the cylindrical lens.Owing to its simplicity,flexibility,and controllability,the proposed method is capable of creating new opportunities in bioassays as well as in drug delivery. | Zhen Che Wenguo Zhu Yaoming Huang Yu Zhang Linqing Zhuo Pengpeng Fan Zhibin Li Huadan Zheng Wenjin Long Wentao Qiu Yunhan Luo Jun Zhang Jinghua Ge Jianhui Yu Zhe Chen | 2020 | Photonics Research2020，8，7： | 1 |
| 7 | 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显示文摘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). | Pengpeng Qiu Tao Zhao Xiaohang Zhu Binota Thokchom Jianping Yang Wan Jiang Lianjun Wang Yuchi Fan Xiaopeng Li Wei Luo | 2021 | Chinese Chemical Letters2021，32，4： | 1 |
| 8 | Yolk-shell structured Fe@void@mesoporous silica with high magnetization for activating peroxymonosulfate显示文摘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. | Bingqian Xu Wan Jiang Lianjun Wang Binota Thokchom Pengpeng Qiu Wei Luo | 2020 | Chinese Chemical Letters2020，31，7： | 1 |
| 9 | One-step preparation of carbon nanotubes with nickel as the core显示文摘CNTs with core-shell structure were successfully synthesized by a microwave-assisted polyol method,and magnetic Ni nanoparticles were employed as a catalyst. The preparation method is fast and simple. The structures,morphology and magnetic properties of the as-synthesized samples were investigated using Raman spectrometer,X-ray diffraction (XRD),transmission electron microscopy (TEM),vibrating sample magnetometer (VSM),respectively. The XRD results suggested that Ni particles used as a catalyst in our experiment were nano-sized. In this paper,magnetic Ni nanoparticles were employed as a catalyst,and an electric spark on metal Ni nanoparticles with the microwave eddy current effect could induce CNTs’ formation with the further reaction. The length of hollow carbon nanotubes was micro-sized and the diameters of most of the CNTs were varying from 18 to 20 nm according to the TEM images. Magnetic measurements demonstrated that CNTs with core-shell structure indicated a characteristic ferromagnetic behavior compared with Ni nanoparticles. | RUAN Zheng LIU XianSong HU Feng ZHU DeRu CHENG ChunHao QIU ShiXing ZHOU Dan GAO HuaMin JIA DaoNing WANG PengPeng | 2011 | Science China(Technological Sciences)2011，54，1： | 1 |
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