▎ 摘　　要

NOVELTY - A colorimetric process involves preparing graphene oxide-platinum nickel nanocomposite by dispersing 0.2 ml graphene oxide into 3.8 ml ultrapure water, adding 62 mu l chloroplatinic acid and 20 mu l nickel chloride in which atomic ratio of platinum to nickel is 3:1, stirring mixture in ice-water bath for 5 minutes, adding sodium borohydride and water to one centrifuge tube to obtain sodium borohydride solution, and adding solution dropwise into mixture under vigorous stirring for 1 hour to obtain graphene oxide-platinum nickel nanocomposite. USE - A colorimetric process for detection of hydrogen peroxide. ADVANTAGE - Method has better stability in harsh environments, convenience to synthesize and flexibility of structure with low difficulty of modification. DETAILED DESCRIPTION - A colorimetric process involves preparing graphene oxide-platinum nickel nanocomposite by dispersing 0.2 ml graphene oxide into 3.8 ml ultrapure water, adding 62 mu l chloroplatinic acid and 20 mu l nickel chloride in which atomic ratio of platinum to nickel is 3:1, stirring mixture in ice-water bath for 5 minutes, adding sodium borohydride and water to one centrifuge tube to obtain sodium borohydride solution, and adding solution dropwise into mixture under vigorous stirring for 1 hour to obtain graphene oxide-platinum nickel nanocomposite in which detection of hydrogen peroxide is carried out by reacting 10 mg/ml graphene oxide-platinum nickel nanocomposite and 10 mu l hydrogen peroxide in 0.4 ml phosphate buffer with 10 mu l tetramethylbenzidine (TMB) substrate at 50 degrees C, incubating at 50 degrees C for 15 minutes and recording absorbance of mixture at 650 nm in which results indicate presence of hydrogen peroxide.