文献类型：期刊文献

中文题名：Efficient toluene degradation using Bacillus subtilis biofilm-supported Mn-Ce/zeolite catalysts

作者：Muhammad Zubair Mohsin[1];Ali Mohsin[1];Waqas Qamar Zaman[2];Xiaojuan Zhu[1];Xihua Zhao[3];Zain Abbas[4];Muhammad Hammad Hussain[1];Ali Shan[5];Salim-ur-Rehman[6];Muhammad Asif Nawaz[7];Rabia Omer[1];Yingping Zhuang[1];Meijin Guo[1];Jiaofang Huang[1,3]

机构：[1]State Key Laboratory of Bioreactor Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Institute of Environmental Sciences and Engineering,School of Civil and Environmental Engineering,National University of Sciences and Technology(NUST),Islamabad 44000,Pakistan;[3]College of Life Science,Jiangxi Normal University,Nanchang 330022,China;[4]School of Resources and Environmental Engineering,State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,East China University of Science and Technology,Shanghai 200237,China;[5]College of Materials Science and Engineering,Shenzhen Key Laboratory of Polymer Science and Technology,Guangdong Research Center for Interfacial Engineering of Functional Materials,Shenzhen University,Shenzhen 518055,China;[6]Department of Food Science and Technology,Riphah International University Faisalabad Campus,Faisalabad 44000,Pakistan;[7]Institute of Materials Science of Seville(ICMS),University of Seville,Seville 41092,Spain

年份：2025

卷号：6

期号：2

起止页码：128

中文期刊名：Green Synthesis and Catalysis

外文期刊名：绿色合成与催化(英文)

基金：supported by the National Key Research and Development Program of China(No.2020YFA0908900);the National Natural Science Foundation of China(No.22250410275);the Natural Science Foundation of Shanghai(No.22ZR1416000);the Fundamental Research Funds for the Central Universities.

语种：英文

中文关键词：Zeolite;Toluene oxidation;Engineered Bacillus subtilis biofilm;Metal nanoparticles;CO_(2)selectivity

摘要：This study investigated a new approach for synthesizing Bacillus subtilis biofilm-supported Mn-Ce/zeolite catalysts for the degradation of gaseous toluene.Four different metal oxide nano-catalysts(ZMn,ZMnCe-10%,ZMnCe-20%,and ZMnCe-30%)were synthesized with varying ratios of manganese(Mn)and cerium(Ce)on zeolite nanoparticles.TEM,SEM,XRD,BET,XPS,and EDX mapping were used to examine these four samples,as well as simple zeolite.Based on these analyses,the catalytic activity of the prepared samples ZMn,ZMnCe-10%,ZMnCe-20%,and ZMnCe-30%for the complete oxidation of toluene and toluene intermediate products were tested with Non-thermal plasma(NTP)technology in a dielectric barrier discharge(DBD)reactor.Among all,ZMnCe-20%showed the highest toluene degradation efficiency(89%)at low concentrations(200 ppm)and humidity(>50%).Later,highly efficient and hydrophobic nano-biocatalysts were prepared by combining B.subtilis biofilm wildtype(WT)and engineered B.subtilis biofilm EPS with ZMnCe-20%catalyst.EPS is the main component found in biofilm matrix and plays a key role in influencing properties such as biofilm stability,electron transfer,surface roughness and hydrophobicity.Compared to WT B.subtilis biofilm,EPS overexpressed B.subtilis biofilm showed stronger growth and development on ZMnCe-20%nanocatalyst.Moreover,the NTP system packed with ZMnCe-20%/biofilm(EPSt)nano-biocatalyst exhibited the highest toluene degradation activity(99%)with(83%)CO_(2)selectivity,(up to 50%)reduction in NOx concentration and complete ozone decomposition at(250 ppm)toluene concentrations and increased humidity(>90%).High-energy electrons generated in the NTP system break the C-H and C-C bond between the rings of the toluene molecule,forming several byproducts which are later reacted with active radical species such as O·,OH·,and O_(3)and further converted into final degradation products(CO_(2)and H_(2)O).The results demonstrated successful biofilm development and growth on the ZMnCe-20%catalyst with advanced features such as superhydrophobicity,H_(2)O resistance,improved surface roughness,and electron generation.In short,the study's approach combines bioengineering and material science to develop sustainable nanobiocatalysts for removing VOCs in industrial and environmental settings.