Method for preparing Ag3PO4/GO/HAP composite photocatalyst by utilizing bovine bones

Abstract

The invention discloses a method for preparing an Ag3PO4/GO/HAP composite photocatalyst by utilizing bovine bones, graphene oxide and silver nitrate, and belongs to the field of high-value resource utilization of animal husbandry solid wastes, and phosphate in the bovine bones is used as a phosphorus source of a silver phosphate photocatalyst. The preparation method comprises the following steps:crushing bovine bones into small blocks, boiling the small blocks with deionized water for several hours, washing the small blocks for several times until grease and collagen are removed, then puttingthe small blocks into a muffle furnace for pyrolysis to prepare biomass hydroxyl calcium phosphate, carrying out ball milling on the biomass hydroxyl calcium phosphate, and carrying out reaction in darkon the milled biomass hydroxyl calcium phosphate and a silver nitrate solution in which graphene oxide is dispersed under an ultrasonic condition, and then, carrying out washing, centrifuging and drying in vacuum to obtain the Ag3PO4/GO/HAP composite photocatalyst. The biomass hydroxyl calcium phosphate is prepared from the bovine bones which are wide in source and low in price, and the prepared catalyst product is high in photocatalytic activity in a visible light region and good in photocatalytic stability and photocorrosion resistance, can be used for degrading organic pollutants in industrial, agricultural and domestic discharged wastewater, and has good economic benefits and environmental benefits.

Description

technical field [0001] The invention discloses a method of using phosphate in bovine bone as the phosphorus source of silver phosphate photocatalyst, and preparing Ag by using bovine bone, graphene oxide and silver nitrate 3 PO 4 The method of / GO / HAP composite photocatalyst belongs to the field of high-value resource utilization of animal husbandry solid waste. Background technique [0002] The scale of cattle herding and cattle raising in my country is huge. According to the National Economic and Social Development Statistical Bulletin of the National Bureau of Statistics in 2019, my country's beef output in 2019 was 6.67 million tons, and about 1.66 million tons of beef bones were produced. The high-value utilization of beef bones has considerable resource advantages. At present, bone products are mainly rough-processed products with low added value, which not only causes waste of resources but also causes environmental pollution. The bandgap width of silver phosphate ...

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Problems solved by technology

[0003] However, the photogenerated electrons generated by silver phosphate under light can easily reduce silver ions to form simple silver (4Ag 3 PO 4 +6H 2 O+12h + +12e - →12Ag+4H 3 PO 4 +3O 2 ), photocorrosion occurs, making the stability of silver phosphate relatively poor, resulting in a significant reduction in its photocatalytic ability, which greatly limits the application and development of silver phosphate photocatalysts

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