Metal-free porous phosphorus-doped g-C(3)N(4) photocatalyst achieving efficient synthesis of benzoin.
Metal-free porous phosphorus-doped g-C(3)N(4) photocatalyst achieving efficient synthesis of benzoin.
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无金属多孔磷掺杂g-C3N4光催化剂实现安息香的高效合成
DOI:
10.1039/d1ra00701g
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发表时间:
2021-03-29
期刊:
影响因子:
3.9
通讯作者:
Xu X
中科院分区:
文献类型:
--
作者:
Li Y;Wang S;Wu J;Wang Q;Ma C;Jiang D;Hu W;Zhu L;Xu X
Photocatalytic organic synthesis is mostly limited by the shortcomings of insufficient light absorption, high photogenerated electron–hole recombination rate and inadequate reactive sites of photocatalysts. To solve these problems, phosphorus-doped g-C3N4 with a porous structure was constructed. Benefiting from enhanced light absorption and electron–hole separation efficiency, PCNT has intensive oxygen activation ability to generate superoxide radicals, and is highly active in organic synthesis. In addition, PCNT has enhanced surface nucleophilicity, which is conducive to the carbon–carbon coupling process of the intermediate product benzaldehyde molecules and benzyl alcohol molecules in the benzoin condensation reaction. Metal-free PCNT is expected to replace the previously used highly toxic cyanide catalysts and provide a new way for the low-cost and efficient photocatalytic synthesis of benzoin. Porous phosphorus-doped g-C3N4 (PCNT) has intensive oxygen activation ability to generate superoxide radicals, and can efficiently catalyze synthesis of benzoin from benzyl alcohol, with conversion rate and selectivity near to 100%.
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