Preparation method of tin-doped bismuth oxychloride visible light photocatalyst

Abstract

The invention discloses a preparation method of a tin-doped bismuth oxychloride visible light photocatalyst. The method concretely comprises the following steps: 1, dissolving 1mmol of Bi(NO3)3.5H2O in 10mL of a hydrochloric acid solution with the molar concentration of 1mol / L to prepare a solution X; 2, dissolving 1mmol of SnCl2.2H2O in 40mL of the hydrochloric acid solution with the molar concentration of 1mol / L under stirring and heating conditions to obtain a transparent and clear solution Y; 3, adding the solution X to the solution y in a dropwise manner under stirring, continuously stirring the obtained solution for 30min, and adjusting the pH value of the obtained mixed system to 1-9 by using a sodium hydroxide solution with the molar concentration of 2mol / L; and 4, continuously stirring the mixed system for 2h after the pH value is stable, filtering and separating the obtained mixture, respectively washing the obtained solid with water and ethanol 3 times, and drying the washed solid in a constant temperature drying box at 60DEG C for 5h to prepare the tin-doped bismuth oxychloride visible light photocatalyst. The tin-doped bismuth oxychloride visible light photocatalyst prepared in the invention has the advantages of wide absorption spectrum range, stable performances, no toxicity, high efficiency and low cost, can be applied in degradation of difficult-biodegradation dye wastewater, and has strong market application prospect.

Description

technical field [0001] The invention belongs to the technical field of synthesis of visible light catalytic materials, and in particular relates to a preparation method of a tin-doped bismuth oxychloride visible light catalyst. Background technique [0002] Organic dye wastewater mainly comes from the textile printing and dyeing industry. Due to the long production process, the wastewater contains a large amount of organic matter, which has high alkalinity, deep color, difficult biodegradation, strong odor, and relatively high COD value. In order to solve the difficulty of wastewater treatment, most of the dyes are aromatic halides, aromatic nitro compounds, aromatic amine chemicals, and combined Benzene and other polyphenyl ring-substituted compounds have high biological toxicity, can cause cancer, teratogenesis and mutagenesis, and seriously pollute the environment, and the removal effect of conventional biological treatment is not ideal. Since the 1990s, countries began ...

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Problems solved by technology

[0002] Organic dye wastewater mainly comes from the textile printing and dyeing industry. Due to the long production process, the wastewater contains a large amount of organic matter, which has high alkalinity, deep color, difficult biodegradation, strong odor, and relatively high COD value. In order to solve the difficulty of wastewater treatment, most of the dyes are aromatic halides, aromatic nitro compounds, aromatic amine chemicals, and combined Benzene and other polyphenyl ring-substituted compounds have high biological toxicity, can cause cancer, teratogenesis and mutagenesis, seriously pollute the environment, and the removal effect of conventional biological treatment is not ideal.