▎ 摘　　要

NOVELTY - Catalyst is claimed. The catalyst is obtained by taking straw-graphene hybrid as carrier and loading nano-zero-valent copper particles on the straw-graphene hybrid under in situ conditions. The loading amount of nano-zero-valent copper is 0.5-3 wt.%. USE - The catalyst is useful in catalytic reduction of p-nitrophenol to p-aminophenol (claimed). ADVANTAGE - The catalyst: has low cost, fast catalytic rate, high conversion rate, reusability and strong stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing catalyst comprising (i) washing the straw, drying, grinding, sieving to obtain straw powder, adding straw powder into graphene oxide solution, and breaking cells to obtain mixed solution containing straw-graphene hybrid, (ii) adding divalent copper salt solution into the mixed solution containing straw-graphene hybrid, sonicating, then adding urea and mixing, and (iii) transferring and sealing the solution obtained in step (ii) into polytetrafluoroethylene reactor, performing hydrothermal treatment, cooling, filtering and washing the obtained sample, freeze-drying and grinding to obtain final product; and (2) use method of catalyst in catalytic reduction of p-nitrophenol to p-aminophenol comprising adding 0.2270 g sodium borohydride into 200 ml 0.1 mmol/l p-nitrophenol solution, where molar ratio between sodium borohydride and p-nitrophenol solution is 300:1, and then adding 10 mg catalyst into fully mixed solution under continuous magnetic stirring to complete the catalytic reduction of p-nitrophenol.