ABSTRACT

The graphitic carbon nitride/copper hydroxide photocatalyst, which achieved ∼15.8-fold enhanced visible-light photocatalytic performance for pollutant degradation compared to origin g-C₃N₄, was synthesised by chemical deposition strategy. The experimental results show that Cu²⁺ ions in Cu(OH)₂ interact with electron-rich N atoms in g-C₃N₄. The stronger interaction promotes the change of the local electric field in g-C₃N₄/Cu(OH)₂ to obtain a more positive valence band, which can generate strongly oxidised photogenerated holes. This photogenerated holes played a dominant role in pollutant degradation. The present work may provide a promising approach to the fabrication of other efficient photocatalyst.

摘要

通过化学沉积策略合成了石墨氮化碳/氢氧化铜光催化剂，其对污染物降解的可见光光催化性能比原始 gC ₃ N _{4提高了 15.8 倍。}实验结果表明，Cu(OH) _2中的Cu ^{2+离子与gC} ₃ N ₄中的富电子N原子相互作用。_{更强的相互作用促进了gC 3} N ₄ /Cu(OH) ₂中局部电场的变化获得更正的价带，可以产生强氧化的光生空穴。这种光生空穴在污染物降解中起主导作用。目前的工作可能为制造其他高效光催化剂提供一种有前景的方法。