Due to concerns about the accessibility of clean water and the quality of treated wastewater, developing a suitable solution to enhance the water quality is critical. Thus, the current study focused on the synthesis of cadmium-doped CdIn₂S₄ incorporated in chitosan, forming Cd/CdIn₂S₄@Ch quantum dots using a solvothermal technique for the efficient photodegradation of hazardous pollutants like ofloxacin and para-nitrophenol through H₂O₂-mediated AOP. Cd/CdIn₂S₄@Ch quantum dots were characterized by several advanced methods, including XRD, PL, UV-DRS, FTIR, SEM, HR-TEM, XPS, DSC, TGA, EDX, and Elemental mapping analysis. The influence of varying reaction parameters, such as the effect of organic compounds, inorganic ions, and water matrices, was also investigated. The prepared composite showed outstanding photodegradation efficiency of 85.51 ± 1.35% and 96.70 ± 1.31%, with a rate constant of 0.02334 and 0.15134 min⁻¹, which is about 1.24 and 2.07 times higher than pristine CdIn₂S₄ for ofloxacin and para-nitrophenol, respectively. The COD values were reduced to 80.67 ± 1.67% for ofloxacin and 88.36 ± 1.43% for para-nitrophenol, whereas the TOC values reduced to 73.49% and 86.34%, respectively, from their initial values. The improved performance is ascribed to the encapsulation of CdIn₂S₄ by chitosan, leading to the self-doping of cadmium into the photocatalyst, as the incorporated cadmium doping site can generate a local electron accumulation point, improving the charge separation efficacy and surface charge mitigation capability of chitosan nanosheets even further. The scavenger experiments showed that hydroxyl and superoxide radicals played a significant part in the photodegradation of contaminants. Additionally, the quantum dots showed excellent constancy and were recyclable up to six times, suggesting exceptional stability and reusability of the manufactured photocatalyst. The fabricated Cd/CdIn₂S₄@Ch quantum dots could be an excellent photocatalyst for removing organic pollutants from wastewater in the near future.

由于对清洁水的获取和处理后废水的质量的担忧，开发合适的解决方案来提高水质至关重要。因此，当前的研究重点是合成掺入壳聚糖的镉掺杂CdIn ₂ S _{4 ，利用溶剂热技术形成Cd/CdIn 2} S ₄ @Ch量子点，通过光催化技术有效光降解氧氟沙星和对硝基苯酚等有害污染物。 H ₂ O ₂介导的AOP。Cd/CdIn ₂ S ₄ @Ch 量子点通过多种先进方法进行表征，包括 XRD、PL、UV-DRS、FTIR、SEM、HR-TEM、XPS、DSC、TGA、EDX 和元素图谱分析。还研究了不同反应参数的影响，例如有机化合物、无机离子和水基质的影响。所制备的复合材料对氧氟沙星和对硝基苯酚表现出出色的光降解效率，分别为85.51 ± 1.35%和96.70 ± 1.31%，速率常数分别为0.02334和0.15134 min ^{-1 ，分别比原始CdIn} ₂ S ₄高约1.24和2.07倍。， 分别。氧氟沙星的 COD 值降低至 80.67 ± 1.67%，对硝基苯酚降低至 88.36 ± 1.43%，而 TOC 值则分别从初始值降低至 73.49% 和 86.34%。性能的提高归因于壳聚糖对CdIn 2 S 4 的封装，导致镉自掺杂到光催化剂中，因为掺入的镉掺杂位点可以产生局部电子积累点，从而提高了电荷分离_效率和_表面电荷壳聚糖纳米片的缓解能力进一步增强。清除剂实验表明，羟基和超氧自由基在污染物的光降解中发挥着重要作用。此外，量子点表现出优异的稳定性，并且可回收多达六次，这表明所制造的光催化剂具有出色的稳定性和可重复使用性。所制备的Cd/CdIn ₂ S ₄ @Ch量子点在不久的将来可能成为一种出色的光催化剂，用于去除废水中的有机污染物。