▎ 摘　　要

NOVELTY - Preparing composite material of the multi-walled carbon nanotube (MWCNTs)-graphene oxide nanoribbon (GONRs) involves magnetically stirring concentrated sulfuric acid, dispersing 150 mg MWCNTs in 20 mL of solution of concentrated sulfuric acid (98 wt.%), and stirring for 1 hour at room temperature through magnetic force, where the sulfuric acid condition is favorable for cracking the MWCNTs and then forming a graphene oxide nanoribbon in the stirring process. Phosphoric acid is added with stirring and the addition of (85 wt.%, 2 mL) phosphoric acid in the stirring process, improves the selectivity of oxidative cracking, and in the oxidation process, in-situ protection of vicinal diol is formed on the basal plane of graphene, so that excessive oxidation of the multiwalled carbon nanotube-graphene oxide nanoribbons and subsequent generation of holes are prevented. USE - Method for preparing composite material of the multi-walled carbon nanotube-graphene oxide nanoribbon for detection of methyl parathion (claimed). ADVANTAGE - The method enables to prepare composite material of multi-wall carbon nano tube-graphene oxide nano-ribbon, which has good electrochemical response to methyl parathion, and provides a path for fast electronic transmission, and also provides active sites, at the same time, because the composite material edge has a large amount of active oxygen-containing group, it improves the dispersibility of the material. DETAILED DESCRIPTION - Preparing composite material of the multi-walled carbon nanotube (MWCNTs)-graphene oxide nanoribbon (GONRs) involves magnetically stirring concentrated sulfuric acid, dispersing 150 mg MWCNTs in 20 mL of solution of concentrated sulfuric acid (98 wt.%), and stirring for 1 hour at room temperature through magnetic force, where the sulfuric acid condition is favorable for cracking the MWCNTs and then forming a graphene oxide nanoribbon in the stirring process. Phosphoric acid is added with stirring and the addition of (85 wt.%, 2 mL) phosphoric acid in the stirring process, improves the selectivity of oxidative cracking, and in the oxidation process, in-situ protection of vicinal diol is formed on the basal plane of graphene, so that excessive oxidation of the multiwalled carbon nanotube-graphene oxide nanoribbons and subsequent generation of holes are prevented. Potassium permanganate is added, stirred, and after the mixture is continuously stirred for 15 minutes, 300 mg potassium permanganate is further added and stirred again. The reaction temperature is controlled to 65degrees Celsius, stirred for 2 hours and then the mixture is poured into ice water containing 6 mL hydrogen peroxide for terminating the reaction. The reaction mixture is filtered under suction and washed with 20 vol.% hydrochloric acid solution. The obtained solid is ultrasonicated in water for 2 hours, and 30 mL 85% hydrochloric acid is added to solidify the product. The solid product is washed and dispersed in ethanol by performing ultrasonication for 2 hours. The suspension is filtered, washed, and with anhydrous diethyl ether is added to solidify. The solid product is filtered out, washed, and dried in vacuum at 60degrees Celsius overnight to obtain the composite material of the multi-walled carbon nanotube-graphene oxide nanoribbon. INDEPENDENT CLAIMS are included for: i. composite material of the multi-walled carbon nanotube-graphene oxide nanoribbon; and ii. a method for detection of methyl parathion by using composite material of the multi-walled carbon nanotube-graphene oxide nanoribbon, which involves: a. preparing a composite material of a multi-walled carbon nanotube-graphene oxide nanoribbon; b. preparing a modified electrode based on composite material of a multi-walled carbon nanotube-graphene oxide nanoribbon; c. determining the electrochemical behavior of methyl parathion on glassy carbon electrodes (GCEs), MWCNT/GCE and MWCNTs/GONRs/GCE; d. determining a mass transfer mechanism of the reaction process of the methyl parathion on the modified electrode; e. optimizing experimental conditions; and f. carrying out electrochemical quantitative detection on methyl parathion.