Abstract: The influence of the amount of catalyst,the initial concentration of Cr(Ⅵ) ion,pH value,reaction temperature and some inorganic salts on the photocatalytic reduction process were investigated under simulated sunlight.The results showed that Cr(Ⅵ) ion removal rate increased with increasing the amount of Cr(Ⅵ) ions.Cr(Ⅵ) removal rate decreased gradually with the increase of initial concentration.When the initial concentration reached 0.025g/L,the removal rate of Cr(Ⅵ) almost did not change with the prolonging of irradiation time.The state of Cr(Ⅵ) ion and the oxidation-reduction reaction were greatly affected by pH value of system.The removal rate of Cr(Ⅵ) increased with the decrease of pH value.The reaction temperature was 25℃.The reduction of Cr(Ⅵ) was the highest when the reaction temperature was 25℃.The photocatalytic reduction rate of Cr(Ⅵ) ions was enhanced by Na2SO3 solution,while K2S2O8 and NaCl solution had obvious inhibitory effect.
黄云镜, 于计生, 唐丽梅, 李青松. 太阳光下TiO2光催化还原Cr(Ⅵ)影响因素研究[J]. 化工新型材料, 2018, 46(8): 191-194.
Huang Yunjing, Yu Jisheng, Tang Limei, Li Qingsong. Study on the reduction of Cr(Ⅵ) by TiO2 catalyst under simulated sunlight irradiation. New Chemical Materials, 2018, 46(8): 191-194.
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