CAJ | 학술논문

采用溶胶凝胶法合成纳米二氧化钛光催化剂,X衍射及红外表征显示银已进入催化剂晶胞中.以汞灯模拟紫外光,氙灯模拟自然条件下太阳光催化降解酸性红B染料,结果表明1%和2%银掺入提高了纳米二氧化钛的可见光催化效能,使得催化剂的吸光波长范围红移,X衍射表征及催化剂筛选实验表明2%Ag-TiO2为锐钛矿晶型,具有较高催化活性,常温常压500 w氙灯照射下,催化剂用量为1.5 g/L、模拟废水pH =4、光照150 min、模拟废水浓度为50 mg/L时,酸性红B染料模拟废水的脱色率达90%,矿化率达60%.
채용용효응효법합성납미이양화태광최화제,X연사급홍외표정현시은이진입최화제정포중.이홍등모의자외광,선등모의자연조건하태양광최화강해산성홍B염료,결과표명1%화2%은참입제고료납미이양화태적가견광최화효능,사득최화제적흡광파장범위홍이,X연사표정급최화제사선실험표명2%Ag-TiO2위예태광정형,구유교고최화활성,상온상압500 w선등조사하,최화제용량위1.5 g/L、모의폐수pH =4、광조150 min、모의폐수농도위50 mg/L시,산성홍B염료모의폐수적탈색솔체90%,광화솔체60%.
Nano Ag-loaded TiO2 was synthesized via a sol-gel method and characterized by X-ray powder diffraction and FTIR. The characterization data showed that Ag+ had probably gotten into the crystal of Nano TiO2,the 2%Ag-TiO2 was anatase crystal. Visible and ultraviolet light were respectively simulated by xenon and mercury lamps. Catalytic degradation of Acid Red B simulated wastewater was investigated under the lamps. The results indicated that the catalytic efficiency had been increased and the absorbed wavelength had been shifted to infrared area when Ag+doping amounts were 1%and 2%.The results of catalysts selected experiments show ed that the 2%Ag-TiO2 had better catalytic activity. The results of catalytic degradation of Acid Red B experiment showed that the decolorization and mineralization rate of Acid Red B (50mg/L) respectively reached 90%and 60%under the xenon lamp in the presence of 2%Ag-loaded TiO2 (1.5g/L) at pH value 4 after 150 minutes under normal temperature and pressure.