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Strong base g-C3N4 with perfect structure for photocatalytically eliminating formaldehyde under visible-light irradiation
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2018-01-08 , DOI: 10.1016/j.apcatb.2018.01.014
Shaoqing Song , Changhai Lu , Xi Wu , Shujuan Jiang , Chuanzhi Sun , Zhanggao Le

Solid strong base systems of g-C3N4 by inducing potassium (KC3N4) were constructed for photocatalytically decomposing HCHO. Characterization and theoretical calculation revealed that the formation of K-C and K-N perfected the π-conjugated structure of g-C3N4, which greatly enhanced the basicity, improve optical and electrical properties of g-C3N4. In the photocatalytic process, K-improved π-conjugated structure promoted HCHO adsorption, activation, completely oxidative decomposition under visible-light irradiation. Therefore, KC3N4 photocatalysts presented high efficiency in photocatalytic elimination of HCHO, and the optimal apparent rate reached 0.21 mol−0.17 L0.17 min−1 with 1.17 reaction order by promoting the reaction between active oxygen (OH and OH) and formate species under visible-light irradiation, which was 30 times of that (0.007 mol−0.17 L0.17 min−1) over pristine g-C3N4. These results may suggest a new way for probing the advanced solid strong base photocatalysts for eliminating volatile organic compounds.



中文翻译:

具有良好结构的强碱gC 3 N 4,可在可见光照射下光催化消除甲醛

构建了通过诱导钾(KC 3 N 4)生成的gC 3 N 4固体强碱体系,用于光催化分解HCHO。表征和理论计算表明,KC和KN的形成完善GC的π共轭结构3 Ñ 4,这大大提高了碱性,提高GC的光学和电学性质3 Ñ 4。在光催化过程中,K改进的π共轭结构促进了HCHO在可见光照射下的吸附,活化和完全氧化分解。因此,KC 3 N 4光催化剂具有高效去除HCHO的效率,通过促进活性氧(OH和OH)与甲酸盐类物质在可见光下的反应,最佳表观速率达到0.21 mol -0.17  L 0.17  min -1,反应顺序为1.17 ,这是原始gC 3 N 4的30倍(0.007 mol -0.17  L 0.17  min -1)。这些结果可能为探测先进的固态强碱光催化剂消除挥发性有机化合物提供了一种新途径。

更新日期:2018-01-08
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