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High-dispersive FeS2 on graphene oxide for effective degradation of 4-chlorophenol

机译：氧化石墨烯上的高分散FeS2可有效降解4-氯苯酚

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A high-dispersive FeS2 micro-cube crystal on graphene oxide (FeS2@ GO) was fabricated by a one-pot hydrothermal method. The catalytic degradation of 4-chlorophenol (4-CP) and its mechanism in a FeS2@ GO-based Fenton system was investigated. Under acidic to slight alkaline conditions, FeS2@GO demonstrated an excellent capacity to remove 4-CP. More than 97% of 4-CP was eliminated within 60 min in pH 7.0 reaction solutions initially containing 0.2 g L-1 FeS2@GO, 128.6 mg L-1 4-CP and 100 mM H2O2 at 25 +/- 1 degrees C, and the removal of 4-CP was further enhanced with increasing FeS2@GO loadings. In the meantime, the FeS2@ GO also achieved lower iron leaching and a more complete TOC removal compared with pure synthetic FeS2 without graphene oxide. Furthermore, acetic acid and oxalic acid were identified as the primary products. The remarkable capacity of the FeS2@ GO-based Fenton system in removing 4-CP displays its potential application in the treatment of organic compoundcontaminated water.
机译：通过一锅水热法在氧化石墨烯（FeS2GO）上制备了高分散的FeS2微立方体晶体。研究了FeS2 @ GO基Fenton体系中4-氯苯酚（4-CP）的催化降解及其机理。在酸性至弱碱性条件下，FeS2 @ GO表现出优异的去除4-CP的能力。在pH 7.0反应溶液中在60分钟内消除了97％以上的4-CP，该溶液最初在25 +/- 1摄氏度下含有0.2 g L-1 FeS2 @ GO，128.6 mg L-1 4-CP和100 mM H2O2，随着FeS2 @ GO负载量的增加，4-CP的去除进一步增强。同时，与不含氧化石墨烯的纯合成FeS2相比，FeS2 @ GO还实现了更低的铁浸出和更完全的TOC去除。此外，乙酸和草酸被鉴定为主要产物。基于FeS2 @ GO的Fenton系统具有去除4-CP的出色能力，显示了其在处理有机化合物污染的水中的潜在应用。

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