In2O3 nanoporous nanosphere: A highly efficient photocatalyst for decomposition of perfluorooctanoic acid
In2O3 nanoporous nanosphere: A highly efficient photocatalyst for decomposition of perfluorooctanoic acid
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In2O3纳米多孔纳米球：一种高效分解全氟辛酸的光催化剂
DOI：
10.1016/j.apcatb.2012.06.017
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发表时间：
2012-08-21
影响因子：
22.1
通讯作者：
Li, Xiaoyun
中科院分区：
文献类型：
--
作者：
Li, Zhenmin;Zhang, Pengyi;Li, Xiaoyun
全氟辛酸（PFOA）是一种新兴的持久性有机污染物，由于其在全球范围内的存在和大多数常规分解方法的抗性，越来越受到关注。通过煅烧InOOO/In（OH）（3）纳米多孔微球，制备了尺寸均匀（约100 nm）的In 2 O3纳米多孔微球（NPNS），并对其光催化降解PFOA的活性进行了评价。在乙二胺辅助的醇热体系中，InOOH/In（OH）（3）前驱体由纳米片（约2 nm）自组装而成。In_2O_3纳米粒子具有较高的比表面积（39.0m_2·g ~（-1））和大量的纳米孔（约6 nm）。与商用In 2 O3纳米晶（NC）和TiO 2（Degussa P25）相比，In 2 O3 NPNSs对PFOA的光催化降解具有显著的光催化活性，半衰期为7.1 min，一级反应速率常数分别是In 2 O3 NC和TiO 2的近9倍和54.6倍。In（2）O3 NPNSs对PFOA的上级分解活性主要归因于其纳米孔结构、大的比表面积以及光生空穴与PFOA之间的直接反应。(C)2012爱思唯尔有限公司版权所有。
Perfluorooctanoic acid (PFOA) is an emerging persistent organic pollutant and receives increasing concerns due to its global occurrence and resistance to most conventional decomposition methods. In2O3 nanoporous nanospheres (NPNSs) with uniform size (similar to 100 nm) were obtained by calcining nanoporous InOOO/In(OH)(3) nanospheres and its photocatalytic activity for PFOA decomposition were evaluated. The InOOH/In(OH)(3) precursor was self-assembled from ultrathin nanoplates (similar to 2 nm) in an ethylenediamine-assisted alcohol-thermal system. The In2O3 NPNSs possessed a high value of specific surface area (39.0 m(2) g(-1)) and a large number of nanopores (similar to 6 nm). Compared with commercial In2O3 nanocrystals (NCs) and TiO2 (Degussa P25), In2O3 NPNSs showed a remarkable photocatalytic activity to decompose PFOA with the half-life of 7.1 min. The first-order rate constant of PFOA by In2O3 NPNSs was nearly 9 and 54.6 times higher than that by In2O3 NCs and TiO2 respectively. The superior activity of In(2)O3 NPNSs for PFOA decomposition can be attributed to its nanoporous structure, large specific surface area, and direct reaction between the photogenerated hole and PFOA. (C) 2012 Elsevier B.V. All rights reserved.