Optimization of Microwave Process Parameters in Preparation of Ni-Fe Hydrotalcite by Response Surface Methodology and Evaluation of Photocatalytic Degradation of Antibiotic Wastewater

Abstract

Using the response surface method (RSM), the temperature, time and nickel-iron ratio of the synthesis of NiFe-LDH photocatalyst were used as influencing factors, the removal rate of norfloxacin (NOR) was the response factor, the Sub-mathematical equation was structured. The optimized model predicts that the optimal synthesis temperature, time and nickel-iron ratio are: 127.1 °C, 36 min, 2.854:1, and the removal rate of NOR is 88.25%. The actual removal rate of NOR over NiFe-LDH prepared under the conditions was 89.14%, indicating that the model was successfully established. It provides a reference for the synthesis of hydrotalcite by microwave method.

Keywords:

• Response surface methodology
• NiFe-LDH
• photocatalytic degradation
• microwave hydrothermal method

Additional information

Funding

We thanks to the financially support from Natural Science Foundation of China (No.21978232, No.22072114, No.51979223), the Natural Science Foundation of Shaanxi (No.2022JM093), and Key R & D projects in Shaanxi Province（No.2020KW-070.