Abstract
Formaldehyde is a common pollutant emitted from household products, exhaust gas, cigarette smoke and many other medical and industrial products. Formaldehyde has caused serious environmental problems and become the main indoor pollutant. In this research, we report the polypyrrole-immobilized organo iridium for formaldehyde decomposition. The Cp*IrCl2(ppy) contains the polypyrrole carrier and organo iridium, which could achieve high iridium utilization. It is a heterogeneous catalyst due to the insoluble polymer carrier, and has high catalytic activity for formaldehyde decomposition like homogeneous organometallic catalyst. Due to excellent formaldehyde adsorbability of polypyrrole and high activity of organo iridium, it could achieve 90 % conversion for low concentration formaldehyde oxidation in the air at 20℃. We also confirm the main oxidation products of formaldehyde is CO2. The Cp*IrCl2(ppy) could also catalyze the formaldehyde disproportionation in water, the TOF is up to 5570 h−1 at 343 K. We propose the catalytic mechanism of the formaldehyde decomposition both in the air and water. The catalyst will have great practical significance for treating formaldehyde pollution.
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