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

查看全文 作　　者：Jiawei [1]Ni;Tao [1]Zhao;Lei [2,3]Tang;Pengpeng [1]Qiu;Wan [1]Jiang;Lianjun [1]Wang;Pengcheng [2,4]Xu;Wei [1]Luo 高影响力作者 机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Institute of Functional Materials,Donghua University,Shanghai 201620,China;[2]State Key Laboratory of Transducer Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;[3]College of Life and Environmental Sciences,Shanghai Normal University,Shanghai 200234,China;[4]University of Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2020年第31卷第6期,共6页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Nos.51822202 and 51772050);Shanghai Rising-Star Program(No.18QA1400100);Youth Top-notch Talent Support Program of Shanghai,the Shanghai Committee of Science and Technology,China(No.19520713200);Key Research Program of Frontier Sciences of Chinese Academy of Sciences(No.QYZDJSSW-JSC001);DHU Distinguished Young Professor Program and Fundamental Research Funds for the Central Universities;support of the Youth Innovation Promotion Association CAS(No.2016213)。 摘　　要：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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