Studying the Effect of different Temperatures Synthesis of Fe 3 O 4 /MnO 2 Microrobots on Water Remediation

Abstract Industrial emissions of organic pollutants pose a serious threat to the water environment on which people depend. The effective combination of MnO 2 ‐based microrobots with Fe 3 O 4 nanoparticles offers a promising solution to this challenge. In this work, Fe 3 O 4 /MnO 2 microrobots were synthesised using a low‐cost and efficient one‐step hydrothermal method. It was found that the kinematic speed of the microrobots increased significantly with increasing synthesis temperature. In addition, the higher the synthesis temperature of Fe 3 O 4 /MnO 2 microrobots, the more effective they were in removing organic pollutants. The results showed that different structures of MnO 2 were produced at different temperatures and the effect of the synthesised microrobots at 80 °C, 100 °C and 130 °C on the catalytic performance and degradation effect was investigated. The Fe 3 O 4 /MnO 2 microrobots synthesised at 130° showed the most favourable effect on the catalytic performance and degradation. This finding provides a new strategy for future microrobots for water remediation.