工业化,不断增长的人口,和人类活动(例如,家庭的液体废物,工业单位,和农业用地)是污染淡水资源的主要原因。为了克服这个问题,许多技术已应用于水净化和化学氧化是处理废水的有效方法之一称为高级氧化工艺(AOPs)。在本研究中,合成的磷酸银纳米颗粒被用作光催化高级氧化过程中的催化剂,用于降解各种染料(RhB,MB,MO,和OG)和药物(SMZ)。通过不同的分析工具对光催化剂进行了表征,例如,PXRD,FTIR,UV-VisDRS,DLS,FESEM,和HRTEM。还探索了染料分子与催化剂表面的化学行为或相互作用,以了解光降解反应的机理。所有有机染料和药物均表现出伪一级速率动力学,发现RhB染料和SMZ药物被光催化剂降解非常快。SMZ药物的最大光降解速率为0.0744min-1,RhB染料的最大光降解速率为0.0532min-1,分别。对于OG,观察到最小的染料降解为〜0.0036min-1,比RhB染料的降解率低约15倍。从染料降解的比较研究,发现有机污染物的光降解效率取决于光催化剂的表面电荷。光生反应性物种(空穴,超氧化物,和羟基自由基)也使用不同类型的清除剂进行了研究,这有助于了解光催化剂的光化学反应和机理。在光的存在下,还使用最好的光催化剂对纺织品流出物进行了实际样品分析。
The industrialization, growing population, and human activities (e.g., liquid waste of households, industrial units, and agricultural lands) are the main causes to contaminate fresh water sources. To overcome this issue, many techniques have been applied for water purification and chemical oxidation is one of the effective ways to treat the wastewater called as advanced oxidation process (AOPs). In the present
study, synthesized silver phosphate nanoparticles were employed as catalysts in the photocatalytic advanced oxidation process for the degradation of various dyes (RhB, MB, MO, and OG) and drug (SMZ). The photocatalyst was characterized through different analytical tools, e.g., PXRD, FTIR, UV-Vis DRS, DLS, FESEM, and HRTEM. The chemical behavior or interaction of dye molecule with catalyst surface has also been explored to understand the mechanism of photodegradation reaction. All the organic dyes and drugs showed pseudo first-order rate kinetics and it was found that RhB dye and SMZ drug degraded so fast by the photocatalyst. The maximum observed photodegradation rate was 0.0744 min-1 for SMZ drug and 0.0532 min-1 for RhB dye, respectively. The minimum dye degradation was observed ~ 0.0036 min-1 for OG, which is ~ 15 times lesser than the degradation rate of RhB dye. From the comparative dye degradation
study, it was found that the photodegradation efficiency of organic pollutants depends on the surface charge of the photocatalyst. The role of photogenerated reactive species (holes, superoxides, and hydroxyl free radicals) was also studied using different types of scavengers which helped to understand the photochemical reactions and mechanism by photocatalyst. The real sample analysis of textile effluent was also performed using the best photocatalyst in the presence of light.