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首页> 外文期刊>Catalysis science & technology >Silver cyanamide nanoparticles decorated ultrathin graphitic carbon nitride nanosheets for enhanced visible-light-driven photocatalysis
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Silver cyanamide nanoparticles decorated ultrathin graphitic carbon nitride nanosheets for enhanced visible-light-driven photocatalysis

机译：银氨腈纳米超薄装饰石墨碳氮化nanosheets增强visible-light-driven光催化

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摘要

Metal cyanamide compounds are an emerging class of photoactive materials for solar energy applications. Although silver cyanamide (Ag2NCN) applied in visible-light-driven photocatalysis has been demonstrated, the photocatalytic performance is unsatisfactory. Herein, a composite of Ag2NCN nanoparticles supported on ultrathin carbon nitride (g-C3N4) nanosheets is synthesized by combining thermal annealing and an in situ precipitation method. Due to the band alignment between Ag2NCN and g-C3N4, a type-II semiconductor heterojunction is built up to improve the photocatalytic activity of pristine Ag2NCN. The as-prepared nanocomposites exhibit enhanced photocatalytic activity for organic dye decolorization under visible light irradiation compared with pure Ag2NCN and pristine g-C3N4 nanosheets. The enhancement of photocatalytic performance can be ascribed to the synergistic effects between Ag2NCN and g-C3N4, which include improved light absorption, superior charge separation, uniform dispersion and smaller size of Ag2NCN loaded on high surface area g-C3N4 nanosheets. The kinetics model and degradation mechanism of the nanocomposites are also proposed.
机译：金属氨腈化合物是一个新兴的一类光敏材料太阳能应用程序。应用于visible-light-driven光催化已经证明,光催化性能不理想。复合Ag2NCN纳米粒子的支持超薄氮化碳(g-C3N4) nanosheets合成结合热退火和一个原位沉淀的方法。一致性Ag2NCN g-C3N4,ⅱ型半导体异质结了提高光催化活性的原始Ag2NCN。对有机染料的光催化活性增加可见光照射下脱色与纯Ag2NCN和原始g-C3N4相比nanosheets。性能可以归因于协同影响Ag2NCN和g-C3N4之间,包括改进的光吸收,优越分离,均匀分散和较小的尺寸高表面积g-C3N4 Ag2NCN加载nanosheets。机制的纳米复合材料建议。

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