Considering the threat of H₂O₂ to human health and environmental security, it is of great significance to develop rapid, accurate and sensitive analytical methods for H₂O₂ detection. In this work, porous regular hexagonal-shaped FeS₂ nanosheets (NSs) with a side length of about 1 μm are employed as a peroxidase mimic to detect H₂O₂. The K_m of the FeS₂ NSs for H₂O₂ (0.00342 mM) is much lower than actual enzyme HRP (3.7 mM). The FeS₂ NSs exhibit high sensitivity in linear range of 0.02–4.00 μM of H₂O₂ with a limit of detection (LOD) of 7.60 nM (S/N = 3). The Fe ion in the FeS₂ NSs is the active site. No obvious effect on the determination was found when K⁺, NH₄⁺, Ni²⁺, Mn²⁺, Cu²⁺, Zn²⁺, Al³⁺, Ba²⁺, Ca²⁺, NO₃⁻, glucose and sucrose were added in the solution, respectively. The FeS₂ NSs were also applied to rapidly detect H₂O₂ concentrations in different actual samples, such as lens solution, beer and disinfectant.

考虑到H ₂ O ₂对人类健康和环境安全的威胁，开发快速，准确和灵敏的H ₂ O ₂检测分析方法具有重要意义。在这项工作中，边长约为1μm的多孔正六边形FeS ₂纳米薄片（NSs）被用作过氧化物酶模拟物来检测H ₂ O ₂。H ₂ O ₂的FeS ₂ NS的K _m（0.00342 mM）比实际的酶HRP（3.7 mM）低得多。FeS ₂ NS在0.02–4.00μMH _2的线性范围内表现出高灵敏度O ₂的检出限（LOD）为7.60 nM（S / N = 3）。FeS ₂ NSs中的Fe离子是活性位点。对测定没有明显的影响，发现当K ⁺，NH ₄ ⁺，镍²⁺，锰²⁺，铜²⁺，锌²⁺，铝³⁺，钡²⁺，钙²⁺，NO ₃ ^- ，葡萄糖和在溶液中分别加入蔗糖。FeS ₂ NS还用于快速检测不同实际样品（例如镜片溶液，啤酒和消毒剂）中的H ₂ O ₂浓度。