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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Natural leaves-assisted synthesis of nitrogen-doped, carbon-rich nanodots-sensitized, Ag-loaded anatase TiO2 square nanosheets with dominant {001} facets and their enhanced catalytic applications
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Natural leaves-assisted synthesis of nitrogen-doped, carbon-rich nanodots-sensitized, Ag-loaded anatase TiO2 square nanosheets with dominant {001} facets and their enhanced catalytic applications

机译：具有主{001}面的自然叶辅助合成的氮掺杂，富碳纳米点敏感的，载银的锐钛矿型TiO2方形纳米片及其增强的催化应用

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摘要

Extending the UV response of anatase TiO2 photocatalysts into the visible light range can play a pivotal role in promoting the practical applications of these catalysts. Nitrogen and carbon co-doped, silver loaded anatase TiO2 (Ag@NC-TiO2) single-crystal nanosheets dominated by {001} facets were prepared for the first time using leaves as the nitrogen and carbon source by a facile, low cost method. The size of the Ag particles on NC-TiO2 nanosheets can be tuned from 1.5 nm to 15 nm using a photo-reduction strategy. The synthesized Ag@NC-TiO2 nanosheets show higher photocatalytic activity in the photodecomposition of organic pollutants compared to NC-TiO2, TiO2 and P25 under visible light irradiation. The enhanced photocatalytic efficiency was ascribed to a synergistic effect between N, C and Ag. In addition, the formed Ag@NC-TiO2 heteronanosheets are highly dispersible in aqueous solution and are capable of efficient catalysis for the reduction of p-nitrophenol. The present synthesis gives a promising method of forming non-metal co-doped, metal nanoparticles (NPs) loaded anatase TiO2 with dominant {001} facets and for broad applications in catalysis and photocatalysis.
机译：将锐钛矿型TiO2光催化剂的紫外线响应扩展到可见光范围内，可以在促进这些催化剂的实际应用中发挥关键作用。以树叶为氮和碳源，通过一种简便，低成本的方法，首次制备了氮和碳共掺杂的，以{001}面为主的载银锐钛矿型TiO2（Ag @ NC-TiO2）单晶纳米片。可以使用光还原策略将NC-TiO2纳米片上的Ag颗粒的尺寸从1.5 nm调整为15 nm。在可见光照射下，合成的Ag @ NC-TiO2纳米片材比NC-TiO2，TiO2和P25具有更高的光催化活性。增强的光催化效率归因于N，C和Ag之间的协同作用。另外，形成的Ag @ NC-TiO2杂纳米片材在水溶液中高度分散，并且能够有效催化还原对硝基苯酚。本发明合成提供了一种有前途的方法，该方法可以形成具有主要的{001}晶面的负载有锐钛矿型TiO 2的非金属共掺杂金属纳米颗粒（NPs），并广泛用于催化和光催化。

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