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Role of sorbent surface functionalities and microporosity in 2,2′,4,4′-tetrabromodiphenyl ether sorption onto biochars

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Journal of Environmental Sciences 2013年第7期25卷 1368-1378页

作者： Jia Xin Ruilong Liu Hubo Fan Meilan Wang Miao Li Xiang Liu School of Environment Tsinghua University

The study provides insight into the combined effect of sorbent surface functionalities and microporosity on2,2 ′,4,4 ′-tetrabromodiphenyl ether （BDE-47） sorption onto biochars. A series of biochars prepared underdifferent conditionswere used to test their sorption behaviorswith BDE-47. The extents of sorption behaviorswere parameterized in terms of the single-point adsorption equilibrium constant （Koc ） at three equilibrium concentration （C e ） levels （0.001Sw （solubility）, 0.005Sw , and 0.05Sw ）whichwasdetermined using the Freundlich model. To elucidate the concentration-dependentdominant mechanisms for BDE-47 sorption onto biochars, K ocwas correlatedwith four major parameters using multiple parameter linear analysis accompaniedwith significance testing. The results indicated that at low concentration （Ce = 0.001Sw ）, the surface microporosity term,which represented a pore-filling mechanism, contributed significantly to this relationship,while as concentrationwas increased to higher levels, surface functionality related to surface adsorption began to take thedominant role,whichwas further confirmed by the results of Polanyi-based modeling. Given the above results, adual mode model based on Dubinin-Radushkevich andde Boer-Zwikker equationswas adopted to quantitatively assess the changes of significance of surface adsorption aswell as that of pore fillingwith sorption processdevelopment. In addition, UV spectra of four typical aromatic compoundswhich represented the key structural fragments of biochars before and after interactionswith BDE-47were analyzed todetermine the active functional groups and supply complementary evidence for thedominant interaction force for surface adsorption, based onwhich π-π electron-donor-acceptor interactionwas proposed to contribute greatly to surface adsorption.

关键词： biochar polybrominateddiphenyl ethers (PBDEs) sorption surface functionality microporosity

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Laser surface functionalization to achieve extreme surface wetting conditions and resultant surface functionalities

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Journal of Central South University 2022年第10期29卷 3217-3247页

作者： WANG Qing-hua WANG Hui-xin School of Mechanical Engineering Southeast UniversityNanjing 211189China Jiangsu Key Laboratory for Design and Manufacture of Micro-nano Biomedical Instruments Nanjing 211189China Institute of Agricultural Facilities and Equipment Jiangsu Academy of Agricultural SciencesNanjing 210014China

Wetting condition of micro/nanostructured surface has received tremendous attention due to the potential applications in commercial,industrial,and military *** with extreme wetting properties,e.g.,superhydrophobic or superhydrophilic,are extensively employed due to their superior anti-icing,drag reduction,enhanced boiling heat transfer,self-cleaning,and anti-bacterial properties depending on solid-liquid interfacial ***-based techniques have gained popularity in recent years to create micro/nano-structured surface owing to their high flexibility,system precision,and ease for *** techniques create laser induced periodic surface structures(LIPSS)or hierarchical structures on substrate ***,micro/nanostructures alone cannot attain the desired *** modification of surface chemistry is essentially needed to achieve target extreme *** review paper aims to provide a comprehensive review for both laser texturing techniques and the following chemistry modification *** research progress and fundamental mechanisms of surface structure generation via different types of lasers and various chemistry modification methods are *** complex combination between the laser texturing and surface chemistry modification methods to decide the final wetting condition is *** importantly,surface functionalities of these surfaces with extreme wetting properties are ***,prospects for future research are proposed and discussed.

关键词： laser surface modification extreme wettability chemistry modification surface functionality

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Interfacial-interaction-induced fabrication of biomass-derived porous carbon with enhanced intrinsic active sites

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Chinese Journal of Catalysis 2022年第8期43卷 2231-2239页

作者： Wenjuan Zhang Pei Jing Juan Du Shujie Wu Wenfu Yan Gang Liu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103JilinChina

Carbon catalysis is an attractive metal-free catalytic transformation,and its performance is significantly dependent on the number of accessible active ***,owing to the inherent stability of the C-C linkage,only limited active sites at the edge defects of the basal plane can be obtained even after a harsh oxidation *** this study,the concept of interfacial interactions was adopted to propose an efficient strategy to develop highly active carbon *** alumina/carbon interface formed in situ acted as a cradle for the generation of oxygen-containing functional *** the absence of oxidation treatment,the concentration of oxygen-containing functional groups and the specific surface area can reach 1.27 mmol·g^(-1) and 2340 m^(2)·g^(-1),respectively,which are significantly higher than those of carbon prepared by traditional hard template *** active carbon shows a significant enhancement in catalytic performance in the oxidative coupling of amine to imine,about 22-fold higher than that of a well-known graphite oxide *** interfacial interaction strategies are based on sustainable carbon sources and can effectively tune the porous structure of carbon in the micro-and *** conceptual finding offers new opportunities for the development of high-performance carbon-based metal-free catalysts.

关键词： Interfacial interaction Porous carbon Biomass surface functionality Imines

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