关键词: 氢氛还原, Fe₃O₄/膨润土, 催化活性

Abstract: Fe₃O₄/bentonite composite material was prepared by hydrogen atmosphere reduction method with bentonite and ferric nitrate as raw materials，and the Fe₃O₄/bentonite was characterized by XRD，SEM，and EDS.Results showed the optimum process conditions for preparation of Fe₃O₄/bentonite were as follows：n（OH^-）∶n（Fe³⁺）=1∶1，ratio of Fe to bentonite was 10 mmol/g，reduction temperature was 200 ℃，and reduction time was 30 min.Fe₃O₄/bentonite prepared by hydrogen atmosphere reduction method had good Fenton-like catalytic activity，stability，and magnetic separation performance.Iron compounds were effectively immobilized on bentonite and converted to Fe₃O₄ by hydrogen reduction during preparation process，and the prepared Fe₃O₄/bentonite was a catalytic composite material with decentralized structure，obvious pores and excellent morphology.

Key words: hydrogen atmosphere reduction, Fe₃O₄/bentonite, composite material