Department of Chemical Engineering, SRM Institute of Science and Technology, Chennai, Tamil Nadu 603 203, India.
Department of Chemical Engineering, SRM Institute of Science and Technology, Chennai, Tamil Nadu 603 203, India.
Int J Biol Macromol. 2020 Oct 15;161:282-291. doi: 10.1016/j.ijbiomac.2020.05.204. Epub 2020 May 26.
Advancement in photocatalysis is focused on large-scale commercialization where the immobilization techniques gain attention with an aim to recover and reuse the catalyst for the redemption of pollutants. TiO will act as a potential catalyst and chitosan, a natural biopolymer is used to immobilize TiO. 2,4-Dicholorophenoxyacetic acid, a common broadleaf pesticide found in surface and groundwater is taken as a model pollutant. Thus, the objective is to study TiO/chitosan beads for the degradation of 2,4-dicholorophenoxyacetic acid. TiO/chitosan beads were prepared by the phase inversion method and studied for their morphological and physiological features. The beads were observed to be spherical in shape and X-ray diffraction analysis shows the incorporation of chitosan and TiO. The photocatalytic degradation of 2,4-dicholorophenoxyacetic acid showed 92 % degradation for TiO/chitosan beads in UV light. The results were also compared with bare TiO, and extended to the continuous photocatalytic mode of degradation. The kinetics and stability of the TiO/chitosan beads were monitored for their feasibility.
光催化的发展重点是大规模的商业化，其中固定化技术备受关注，旨在回收和再利用催化剂，以去除污染物。TiO 将作为一种潜在的催化剂，壳聚糖，一种天然的生物聚合物，被用来固定 TiO。2,4-二氯苯氧乙酸，一种常见的在地表水和地下水中的广谱农药，被作为模型污染物。因此，本研究的目的是研究 TiO/壳聚糖珠用于降解 2,4-二氯苯氧乙酸。TiO/壳聚糖珠通过相转化法制备，并对其形态和生理特征进行了研究。观察到珠呈球形，X 射线衍射分析表明壳聚糖和 TiO 的掺入。在紫外光下，TiO/壳聚糖珠对 2,4-二氯苯氧乙酸的光催化降解率达到 92%。结果还与裸露的 TiO 进行了比较，并扩展到连续的光催化降解模式。监测了 TiO/壳聚糖珠的动力学和稳定性，以评估其可行性。
