Water pollution by organic pollutants such as textile dyes is a serious problem that could be solved by advanced photocatalytic semiconductors. Here we synthesized a visible-light photocatalyst made of mesoporous graphitic carbon nitride using the surfactant Tween-40, and we compared the surfactant performance in degrading rhodamine B with graphitic carbon nitride prepared by conventional methods. The toxicity of the photocatalyst was evaluated using bioassays with Allium Cepa. Results show that 93.0% of the rhodamine B was degraded by the new catalyst after 60 min under visible-light irradiation, whereas bulk graphitic carbon nitride and mesoporous graphitic carbon nitride with Pluronic F127 degraded only 30.5 and 86.0% of rhodamine B, respectively. We also found no ecotoxicity of the new catalyst. Higher degradation performance of the photocatalyst is explained by synergistic effect of nitrogen vacancies combined with the higher number of structural defects and more active sites, and by a better separation and transport of photogenerated charges of the synthesized mesopore catalyst, thus inducing a better response under visible light.

有机污染物（例如纺织染料）对水的污染是一个严重的问题，可以通过先进的光催化半导体解决。在这里，我们使用表面活性剂Tween-40合成了由介孔石墨氮化碳制成的可见光光催化剂，并比较了用常规方法制备的若丹明B降解表面活性剂的性能与石墨氮化碳。光催化的毒性通过生物测定与葱属Cepa进行评估。结果表明，在可见光照射60分钟后，新催化剂降解了93.0％的若丹明B，而具有Pluronic F127的本体石墨氮化碳和中孔石墨氮化碳分别仅降解了30.5％和86.0％的若丹明B。我们还没有发现新催化剂的生态毒性。氮空位的协同效应结合更多的结构缺陷和更多的活性位点，以及合成的中孔催化剂的光生电荷得到更好的分离和传输，从而在可见光下引发了更好的响应，从而说明了光催化剂具有更高的降解性能。光。