Preparation method of titanium dioxide supported oxidized cellulose

Abstract

The invention provides a preparation method of titanium dioxide supported oxidized cellulose and belongs to the field of material preparation. The preparation method is characterized by comprising thefollowing steps: a cellulose material is placed in a sodium periodate solution, subjected to ultrasonic treatment at room temperature, left to stand in a thermostatic water bath, then left to stand at 60 DEG C, washed, placed in a glycerol solution and washed, and a cellulose material containing aldehyde groups is obtained; the cellulose material is placed in a deionized water mixed solution andwashed sufficiently, a carboxyl cellulose material is obtained and placed in a titanium dioxide suspension, and a titanium dioxide supported cellulose material is obtained; the titanium dioxide supported cellulose material is washed sufficiently, soaked in a sodium copper chlorophyllin solution, washed sufficiently and naturally dried at room temperature, and the material is obtained. The preparedoxidized cellulose material has higher aldehyde group content, better flatness and higher yield. After sensitization of titanium dioxide, agglomeration is relieved, and titanium dioxide is uniformlydistributed on the oxidized fiber material.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of oxidized cellulose supported titanium dioxide. Background technique [0002] Titanium dioxide stands out among many semiconductor materials because of its large energy gap, stable performance, low price, and non-toxicity. However, the current titanium dioxide-based photocatalytic materials have a low utilization rate of visible light, so designing titanium dioxide-based photocatalytic materials that respond efficiently to visible light has important theoretical and practical application values. At present, titanium dioxide used as photocatalyst mostly adopts suspension phase, which has problems such as easy agglomeration and difficult recovery. For this reason, people load titanium dioxide on a certain carrier to prepare titanium dioxide composite materials. The cellulose material is a more suitable carrier because of its wide distribution, non-toxic,...

AI Technical Summary

Problems solved by technology

Titanium dioxide sensitized by sodium copper chlorophyllin can degrade some organic pollutants under visible light. At present, there are no related reports abroad. Most of them are about dye-sensitized solar cells abroad.

[0004] Sodium copper chlorophyllin sensitized titanium dioxide can increase the wavelength of titanium dioxide to respond to light, thereby improving the utilization rate of visible light. Titanium dioxide sensitized by sodium copper chlorophyllin can degrade some organic pollutants under visible light. battery, but there is no such related report

Whether it is titanium dioxide particles or sensitized titanium dioxide particles, the particles are very small, easy to lose and difficult to recycle, which is not conducive to improving the recycling rate