Silicon quantum dot aqueous phase preparation method

TLDR: In this paper, a silicon quantum dot aqueous phase preparation method is described, where a reduction agent and a coupling agent are obtained and dissolved in water under inertia gas protection, wherein the molar ratio of the coupling agent to the reduction agent is 1: 0.2-10.

Abstract: The invention discloses a silicon quantum dot aqueous phase preparation method. The method includes the following steps that firstly, a reduction agent and a silane coupling agent are obtained and dissolved in water under inertia gas protection, wherein the molar ratio of the silane coupling agent to the reduction agent is 1:(0.2-10); secondly, the mixed solution obtained in the first step is conveyed into a high-pressure reaction kettle to be heated to 140-220 DEG C, and a silicon quantum dot solution can be obtained after reaction; or the mixed solution obtained in the first step is conveyed into a microwave reaction kettle to be heated to 140-220 DEG C, and a silicon quantum dot solution can be obtained after reaction; thirdly, the silicon quantum dot solution obtained in the second step is mixed with an organic solvent, centrifugation is conducted, supernate is removed, drying is conducted, and solid silicon quantum dots are obtained, wherein the reaction agent is a mixture composed of two or more of citric acid, sodium sulfite, sodium borohydride, sodium citrate, ascorbic acid, urea, thiourea, hydrazine hydrate, L-cysteine, bovine serum albumin or modified ovine serum albumin.