Huge consumption of rigid polyurethane foam (RPUF) brings about two serious challenges for our society: fire hazards and environmental pollution. To address these issues, metal oxides and bimetallic oxides used for reducing smoke toxicity was successfully synthesized. The structures and morphologies were confirmed and thermogravimetric analysis indicated that incorporation of 2 wt% NiO conspicuously increased the residual yield of RPUF nanocomposites by 63.8% due to its catalytic coupling effect. Additionally, through the thorough analysis of volatile and condensed products, the smoke toxicity suppression mechanism in the pyrolysis and combustion of RPUF was investigated so as to find out the conversion of CO to CO₂ through a redox cycle, involving the reduction of Ni⁺-Ni⁰ by CO and the oxidation of Ni⁰-Ni⁺ by O₂. Among all the additives, nickel molybdate is the best catalyst which facilitates the migration of fuel-N in RPUF into the pollution-free gas in pyrolysis and combustion process.

硬质聚氨酯泡沫（RPUF）的大量消费给我们的社会带来了两个严重的挑战：火灾隐患和环境污染。为了解决这些问题，成功地合成了用于减少烟气毒性的金属氧化物和双金属氧化物。确认了结构和形态，热重分析表明，由于其催化偶联作用，掺入2 wt％的NiO可以显着提高RPUF纳米复合材料的残留产率63.8％。另外，通过对挥发物和冷凝物的透彻分析，研究了RPUF热解和燃烧过程中烟气的抑制机理，从而发现了氧化还原循环中CO转化为CO ₂的过程，其中涉及Ni ⁺ -的还原。你⁰由Co和Ni的氧化⁰ -Ni ⁺被O ₂。在所有添加剂中，钼酸镍是最好的催化剂，可促进热解和燃烧过程中RPUF中的燃料N迁移到无污染的气体中。