A new porous structure with dispersed nano-TiO2 in a three-dimensional carbon skeleton for achieving high photocatalytic activity

被引：20

作者：

Jhang, Jia-Hao ^{[1
,2
]}

Chang, Shinn-Jen ^{[3
]}

Pedaballi, Sireesha ^{[1
,2
]}

Li, Chia-Chen ^{[1
,2
]}

机构：

[1] Natl Taipei Univ Technol, Inst Mat Sci & Engn, Taipei 10608, Taiwan

[2] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 10608, Taiwan

[3] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 30011, Taiwan

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2019年 / 276卷

关键词：

Porous microsphere; Nanopowder; Titania; Photocatalysis; METAL-OXIDE SEMICONDUCTORS; TIO2; PHOTOCATALYSIS; SOL-GEL; METHYLENE-BLUE; TITANIA; DEGRADATION; SIZE; MORPHOLOGY; FETIO3;

D O I：

10.1016/j.micromeso.2018.09.021

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A new photocatalyst is proposed that incorporates TiO2 nanopowder into a three-dimensional carbon skeleton to create a TiO2/C porous microsphere with adjustable pore size, and its photocatalytic activity is investigated and compared to that of a commercially available photocatalytic powder (P25). The photocatalytic efficiency of the proposed TiO2/C porous microsphere achieves a considerable improvement of more than 2-3 times that of P25 when irradiated by UV and visible lights. With the further incorporation of Fe, the TiO2/C/Fe porous microsphere exhibits maximum photodegradation efficiencies of 97% and 45% when low-power UV and visible lights are the energy sources, respectively; these are significantly higher than the 40% and 10% measured for P25. In addition, the major mechanism for this improvement in photocatalytic activity by the porous microsphere is identified by calculating band gap energies based on a modified Kubelka-Munk function.

引用

页码：62 / 67

页数：6

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