Bio-inspired artificial functional photocatalyst: biomimetic enzyme-like TiO2/reduced graphene oxide nanocomposite with excellent molecular recognition ability
Bio-inspired artificial functional photocatalyst: biomimetic enzyme-like TiO2/reduced graphene oxide nanocomposite with excellent molecular recognition ability
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DOI：
10.1088/0957-4484/26/17/175706
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发表时间：
2015-04
期刊：
影响因子：
3.5
通讯作者：
Wentao Li;Xule Pei;Fang Deng;Xubiao Luo;Fengcong Li;Yongna Xiao
中科院分区：
文献类型：
--
作者：
Wentao Li;Xule Pei;Fang Deng;Xubiao Luo;Fengcong Li;Yongna Xiao
通过模拟酶与底物的几何和化学互补，制备了具有分子识别能力的酶样TiO2/还原氧化石墨烯（酶-TiO2/rGO）纳米复合物。锐钛矿型TiO2纳米晶体密集分布在氧化石墨烯纳米片上，界面接触紧密。酶-TiO2/rGO纳米复合材料对4-硝基苯酚（4.71 mg g−1）的吸附量是不具有酶样特征的对照TiO2/rGO （0.79 mg g−1）的6倍左右，相对选择性系数为7.24。此外，酶- tio2 /rGO表现出对特定污染物的分子识别光催化降解。结果表明，酶-底物识别为仿生和构建高选择性高效光催化剂提供了方便和有力的基础。
An enzyme-like TiO2/reduced graphene oxide (enzyme-TiO2/rGO) nanocomposite with molecular recognition ability was fabricated by biomimicking the geometrical and chemical complementation of the enzyme and substrate. The anatase TiO2 nanocrystals were densely dispersed on rGO nanosheets with close interfacial contacts. With geometrical and chemical matching of target molecules and memorized cavities, the adsorption capacity of enzyme-TiO2/rGO nanocomposites for 4-nitrophenol (4.71 mg g−1) is about six times that of control TiO2/rGO without the enzyme-like feature (0.79 mg g−1), and the enzyme-TiO2/rGO shows a relative selectivity coefficient of 7.24. Moreover, enzyme-TiO2/rGO exhibits molecular recognitive photocatalytic degradation for a particular contaminant. The results demonstrate that enzyme-substrate recognition provides a convenient and powerful basis on which to biomimic and construct efficient photocatalysts with high selectivity.