▎ 摘　　要

NOVELTY - Preparing chemically grafted-surface graphene oxide loaded molybdenum catalyst, comprises ionic bonding amino-functionalized graphene oxide as carrier with phosphomolybdic acid, and carrying out electrostatic interaction to obtain final product. USE - The catalyst is useful in catalytic epoxidation of olefins and selective oxidation of thioether (claimed). ADVANTAGE - The catalyst has strong catalytic activity, strong chemical stability; has no obvious change on the catalytic performance, appearance and metal content and distribution after circulating catalysis; and meets the current advogance of green idea. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) chemically grafted-surface graphene oxide loaded molybdenum catalyst prepared by above method, where the black granular surface chemically grafted graphene oxide supported molybdenum heterogeneous catalyst; and (2) either method for catalyzing epoxidation of non-functionalized olefins, comprising using the catalyst to catalyze epoxidation of non-functionalized olefins, comprising reacting olefin compound of formula (I) to obtain 2-phenyloxirane compound of formula (II), where the non-functionalized olefin is 3-8C chain aliphatic olefin or 3-8C cyclic aliphatic olefin, or method for catalyzing selective oxidation of aryl sulfide, comprising catalyzing the selective oxidation of aryl sulfide of formula (III) using the catalyst to obtain methylsulfonylbenzene compound of formula (IV). R1 = H, 1-8C alkyl, aryl; R2 = H, halo, 1-8C alkyl, 1-8C alkoxy; R1 = H, cyclopropyl, 1-8C alkyl or aryl; and R2 = H, hydroxy, halo, nitro, 1-8C alkyl, 1-8C alkoxy, or 1-2C acyl.