School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
Department of Electronics and Communication Engineering, Sri Sivasubramaniya Nadar College of Engineering, Tamil Nadu, Kalavakkam, 603 110, India.
Sci Rep. 2022 Jul 7;12(1):11572. doi: 10.1038/s41598-022-15799-y.
In recent years, there has been an increase in demand for inexpensive biowaste-derived photocatalysts for the degradation of hazardous dyes and pharmacological drugs. Here, we developed eggshell derived hydroxyapatite nanoparticles entrenched on two-dimensional g-CN nanosheets. The structural, morphological and photophysical behavior of the materials is confirmed through various analytical techniques. The photocatalytic performance of the highly efficient HAp/gCN photocatalyst is evaluated against methylene blue (MB) and doxycycline drug contaminates under UV-visible light exposure. The HAp/gCN photocatalyst exhibit excellent photocatalytic performance for MB dye (93.69%) and doxycycline drug (83.08%) compared to bare HAp and g-CN nanosheets. The ultimate point to note is that the HAp/gCN photocatalyst was recycled in four consecutive cycles without any degradation performance. Superoxide radicals play an important role in degradation performance, which has been confirmed by scavenger experiments. Therefore, the biowaste-derived HAp combined with gCN nanosheets is a promising photocatalyst for the degradation of hazardous dyes and pharmacological drug wastes.
近年来，人们对廉价的生物源光催化剂的需求不断增加，以用于降解危险染料和药物。在这里，我们开发了一种基于蛋壳衍生的羟基磷灰石纳米粒子嵌入二维 g-CN 纳米片的复合材料。通过各种分析技术证实了材料的结构、形态和光物理行为。在紫外可见光照射下，评估了高效 HAp/gCN 光催化剂对亚甲基蓝（MB）和强力霉素药物污染物的光催化性能。与纯 HAp 和 g-CN 纳米片相比，HAp/gCN 光催化剂对 MB 染料（93.69%）和强力霉素药物（83.08%）表现出优异的光催化性能。值得注意的是，HAp/gCN 光催化剂在没有任何降解性能损失的情况下，在四个连续循环中进行了回收。超氧自由基在降解性能中起着重要作用，这已通过清除实验得到证实。因此，基于生物废弃物的 HAp 与 gCN 纳米片相结合是一种很有前途的用于降解危险染料和药物废物的光催化剂。
