High-yield and low-cost method to synthesize large-area porous g-C3N4 nanosheets with improved photocatalytic activity for gaseous nitric oxide and 2-propanol photodegradation

被引:52
作者
Han, Dongyuan [1 ]
Liu, Jing [1 ]
Cai, He [1 ]
Zhou, Xue [1 ]
Kong, Lingru [1 ]
Wang, Jiwei [1 ,3 ]
Shi, Haifeng [4 ]
Guo, Qiang [2 ]
Fan, Xiaoxing [1 ,2 ,3 ]
机构
[1] Liaoning Univ, Sch Phys, Shenyang 110036, Liaoning, Peoples R China
[2] Liaoning Univ, Lvyuan Inst Energy & Environm Sci & Technol, Shenyang 110036, Liaoning, Peoples R China
[3] Liaoning Univ, Liaoning Key Lab Semicond Light Emitting & Photoc, Shenyang 110036, Liaoning, Peoples R China
[4] Jiangnan Univ, Sch Sci, Wuxi 214122, Peoples R China
基金
中国国家自然科学基金;
关键词
g-C3N4; Porous sheet; Glyoxal; Photocatalysis; Nitric oxide removal; GRAPHITIC CARBON NITRIDE; NO OXIDATION; DOPED G-C3N4; PERFORMANCE; WATER; ACID; C3N4;
D O I
10.1016/j.apsusc.2018.09.108
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A high-yield and low-cost method was developed for preparing graphitic carbon nitride (g-C3N4) with high photocatalytic activity. A trace amount of glyoxal-treated melamine was used as the precursor for g-C3N4. Glyoxal played a remarkable role in the thermal condensation of g-C3N4 as it improved the yield, inhibited the grain growth, and increased the specific surface area (up to 119 m(2) g(-1)). The yield of g-C3N4 obtained with this method was 10 times higher than that in the traditional method. SEM, TEM, and EPR results showed that the prepared photocatalysts have a porous nanosheet structure with nitrogen vacancy defects. The photocatalytic activity of the obtained g-C3N4 was estimated by using it for the photodegradation of gaseous nitric oxide (NO) and isopropyl alcohol (IPA) under visible light (lambda > 420 nm). The photocatalytic activity of the porous g-C3N4 nanosheets was well improved as compared with that of bulk g-C3N4. The addition of trace amounts of glyoxal improved the photocatalytic activity remarkably, so this method could open up a new channel for the development of low-cost, high-activity g-C3N4 photocatalysts for green chemistry.
引用
收藏
页码:577 / 585
页数:9
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