In this study, the photocatalytic degradation of Methylene Blue was investigated using CdSe nanoparticles. CdSe nanoparticles were synthesized via a simple method and were characterized by FTIR, XRD, FESEM, BET, DRS and EDS techniques. The photocatalytic performance of the CdSe nanoparticles was optimized using Response Surface Methodology (RSM) under visible light. The independent variables involved initial pH, MB concentration, photocatalyst dosage, and irradiation time were evaluated and the optimum photodegradation efficiency of MB dye removal was achieved ˜ 92.80% at pH = 8, 20 mgL⁻¹ of MB concentration, 0.02 g 50 mL⁻¹ of CdSe dosage, and 20 min of irradiation time. Also, the photodegradation of MB by CdSe is obeyed pseudo-first-order kinetic model (k = 0.038 min⁻¹). The thermodynamic results revealed that the photocatalytic degradation of MB is spontaneous and endothermic. Also, the evaluation of various scavengers confirmed that the MB photodegradation was mainly done by photogenerated holes and hydroxyl radicals.

在这项研究中，使用 CdSe 纳米粒子研究了亚甲基蓝的光催化降解。通过简单的方法合成了 CdSe 纳米颗粒，并通过 FTIR、XRD、FESEM、BET、DRS 和 EDS 技术对其进行了表征。在可见光下使用响应面法 (RSM) 优化了 CdSe 纳米粒子的光催化性能。评估了涉及初始 pH、MB 浓度、光催化剂用量和辐照时间的自变量，在 pH = 8、20 mgL ^-1 MB 浓度、0.02 g 50 mL ^{- 1}的 CdSe 剂量，和 20 分钟的照射时间。此外，CdSe 对 MB 的光降解遵循准一级动力学模型（k = 0.038 min ^-1）。热力学结果表明，MB的光催化降解是自发的和吸热的。此外，对各种清除剂的评估证实，MB 的光降解主要是由光生空穴和羟基自由基完成的。