Light-tuned selective photosynthesis of azo- and azoxy-aromatics using graphitic C3N4

被引:394
作者
Dai, Yitao [1 ,2 ]
Li, Chao [2 ]
Shen, Yanbin [2 ,6 ]
Lim, Tingbin [2 ]
Xu, Jian [2 ]
Li, Yongwang [2 ]
Niemantsverdriet, Hans [2 ,3 ]
Besenbacher, Flemming [1 ]
Lock, Nina [4 ,5 ]
Su, Ren [2 ]
机构
[1] Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
[2] Synfuels China Technol Co Ltd, SynCat Beijing, Leyuan South St 2,1 Yanqi Econ Dev Zone C, Beijing 101407, Peoples R China
[3] SynCat DIFFER, NL-6336 HH Eindhoven, Netherlands
[4] Aarhus Univ, Carbon Dioxide Activat Ctr, Interdisciplinary Nanosci Ctr iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
[5] Aarhus Univ, Dept Chem, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
[6] Suzhou Inst Nanotech & Nanobion SINANO, 398 Ruoshui Rd,Suzhou Ind Pk, Suzhou 215123, Jiangsu, Peoples R China
基金
新加坡国家研究基金会;
关键词
PHOTOCATALYTIC REDUCTION; HIGHLY EFFICIENT; CARBON NITRIDES; NANOPARTICLES; CATALYST; NITROAROMATICS; NITROBENZENE; AZOXYBENZENE; IRRADIATION; ANILINE;
D O I
10.1038/s41467-017-02527-8
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Solar-driven photocatalysis has attracted significant attention in water splitting, CO2 reduction and organic synthesis. The syntheses of valuable azo- and azoxyaromatic dyes via selective photoreduction of nitroaromatic compounds have been realised using supported plasmonic metal nanoparticles at elevated temperatures (>= 90 degrees C); however, the high cost, low efficiency and poor selectivity of such catalyst systems at room temperature limit their application. Here we demonstrate that the inexpensive graphitic C3N4 is an efficient photocatalyst for selective syntheses of a series of azo- and azoxy-aromatic compounds from their corresponding nitroaromatics under either purple (410 nm) or blue light (450 nm) excitation. The high efficiency and high selectivity towards azo-and azoxy-aromatic compounds can be attributed to the weakly bound photogenerated surface adsorbed H-atoms and a favourable N-N coupling reaction. The results reveal financial and environmental potential of photocatalysis for mass production of valuable chemicals.
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页数:7
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