Catalystic Performance And Hydrophobic Propertes Of Biomass Carbon Material

Carbon materials have attracted wide attention from scholars because of their outstanding characteristics and wide application prospects.Biomass as a low-cost,environmentally friendly and renewable carbon resource,the development of carbon-based materials with controllable structure based on biomass,to achieve high value-added disposal of biomass,has important research significance.In this thesis,we chose wheat straw as precursor of carbon material and prepared different carbon material with catalytic performance and hydrophobic performance.The main contents and conclusions were given as follows:1.Using wheat straw as carbon source and P₂O₅ as phosphorus source,phosphorus-doped biomass carbon catalyst was successfully prepared by anaerobic pyrolysis and high temperature calcination.As a result,under water as a solvent and oxygen conditions,the catalyst exhibits good catalytic performance for the reaction of oxidative dehydrogenation of tetrahydroquinoline derivatives to quinolone.In addition,up to 97%yield of quinolone was obtained.At the same time,the surface morphology,surface functional group and graphitization degree of the catalyst were systematically studied by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and Fourier transform infrared spectroscopy（FT-IR）.The effects of different carbonization temperature and carbonization time on the functional groups,morphology and pore structure of carbon surface were investigated.Then,the conditions of catalytic oxidative dehydrogenation were optimized;The catalytic study of tetrahydroisoquinoline derivative,tetrahydroquinoxaline derivative and indoline derivative was carried out systematically.2.Using wheat straw as raw material,a super-hydrophobic carbon material with conductivity was successfully prepared by controlled anaerobic high-temperature calcination carbonization.Using it as a matrix and polydimethylsiloxane as a binder,a superhydrophobic coating was prepared on different substrates,and the contact angle for water was tested to be above 160^o.The coating on the glass substrate was conductive.The rate reaches 240s/m.The morphology and structure of the super-hydrophobic carbon material have been characterized by FT-IR,Raman spectrum,SEM,XRD,elemental analysis（EA）and X-ray photoelectron spectroscopy（XPS）.As a result,the surface has a nano-bump structure similar to Mosquito’s compound eyes,with an average diameter of 42.67 nm and an average spacing of 110nm.The principle of the surface formation of carbon material with micro/nano structure is proposed.Finally,the thermal stability,UV aging resistance and acid resistance/alkalinity of the coating was studied in-depth.