title: A new and environmentally friendly route for preparation of carbon microspheres from wheat straw.
abstract: The reactions were performed to synthesize carbon materials using wheat straw powder as raw material. The wheat straw powder was first hydrolyzed at the absence of a catalyst at 190 °C for 1 h, then the hydrolyzate solution was used as carbon source to prepare carbon materials via hydrothermal carbonization at 180 °C in the absence of a catalyst for 8 h. The influence of solid-liquid-ratio of wheat straw to water on the morphology of the product was investigated. The samples were examined by a scanning electron microscope and Fourier transform infrared spectroscopy. The results show that the product was carbon microspheres with a large number of O-H, CHO, and other functional groups, and the diameters of carbon microspheres noticeably depended on the solid-liquid ratio. When the solid-liquid ratio was 1 : 60, the diameters of carbon microspheres were in the range of 100 to 300 nm when the solid-liquid ratio was 1 : 40, carbon microspheres with larger and more uniform diameters mostly about 250 nm were obtained, and when the solid-liquid-ratio was 1 : 20, there were more larger carbon microspheres with diameters about 800 nm in the product and the surface of these carbon microspheres is smoother, whereas; the uniformity of the product deteriorates.
authors.affiliation: College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Leishan
authors.forename: Wang
authors.initials: W
authors.lastname: Cunjing
authors.forename: Miao
authors.initials: M
authors.lastname: Yu
authors.forename: Chen
authors.initials: C
authors.lastname: Gairong
mesh_terms: D002244:Carbon / Q000737:chemistry*; D006868:Hydrolysis; D008863:Microspheres; D014908:Triticum / Q000737:chemistry*
chemical_list: D002244:Carbon