CAJ | 학술논문

以H4SiW12O40及可溶性淀粉为起始原料，原位合成了H4SiW12O40@C 光催化剂，并采用SEM、EDS、XRD、FTIR、UV-vis、BET对其进行了表征。对 H4SiW12O40@C协同UV/H2O2降解罗丹明B废水工艺进行了研究，考察了不同因素对降解效果的影响及协同效应，并探讨了催化氧化反应机理。研究结果表明：UV-SiW20@C-H2O2体系能高效快速降解废水中的罗丹明 B，产生了明显的协同效应。在优化工艺条件下，即在250mL初始 pH值为3、质量浓度为100mg/L的罗丹明B废水中，SiW20@C催化剂0.15g、H2O2浓度14mmol/L、温度25℃、高压汞灯功率500W、紫外照射70min条件下，罗丹明B脱色率达到了95.78%。紫外可见光谱和HPLC结果显示，罗丹明B分子结构被破坏，分解成了含苯环结构等有机小分子。此外，SiW20@C催化剂还具有较好的重复使用性能。
이H4SiW12O40급가용성정분위기시원료，원위합성료H4SiW12O40@C 광최화제，병채용SEM、EDS、XRD、FTIR、UV-vis、BET대기진행료표정。대 H4SiW12O40@C협동UV/H2O2강해라단명B폐수공예진행료연구，고찰료불동인소대강해효과적영향급협동효응，병탐토료최화양화반응궤리。연구결과표명：UV-SiW20@C-H2O2체계능고효쾌속강해폐수중적라단명 B，산생료명현적협동효응。재우화공예조건하，즉재250mL초시 pH치위3、질량농도위100mg/L적라단명B폐수중，SiW20@C최화제0.15g、H2O2농도14mmol/L、온도25℃、고압홍등공솔500W、자외조사70min조건하，라단명B탈색솔체도료95.78%。자외가견광보화HPLC결과현시，라단명B분자결구피파배，분해성료함분배결구등유궤소분자。차외，SiW20@C최화제환구유교호적중복사용성능。
The H4SiW12O40@C photocatalysts synthesized in situ from silicadodecatungstic acid (SiW12) and soluble starch were studied and characterized by SEM,EDX,XRD,FTIR,UV-vis and BET in this research. The degradation of Rhodamine B (RhB) wastewater with H4SiW12O40@C photocatalysts and hydrogen peroxide was investigated under ultraviolet irradiation. The effects of different factors and synergetic effects on the degradation of RhB were investigated and the mechanism of catalytic oxidation of RhB was discussed. The results showed that the RhB was degraded efficiently. The decoloration efficiency of the RhB was up to 95.78% with the initial pH value of 3 and RhB concentration of 100mg/L under optimal reaction conditions (i.e. SiW20@C of 0.15g,dose of hydrogen peroxide concentration of 14mmol/L,reaction temperature of 25℃,the high pressure mercury lamp power of 500W,the radiation time of 70min). Degradation process of RhB wastewater by ultraviolet, hydrogen peroxide and SiW20@C had synergetic effects. UV-vis spectroscopy and HPLC results of the wastewater showed that the conjugating structure of RhB was destroyed,phenylcontained and small molecular compounds were included in the solution. In addition,the SiW20@C photocatalyst also showed good reusability.