Perspective of mineral reactivity from surfaces to crystal faces: A case study on the oxidation behavior differences among various crystal faces of pyrite

Hongping, He; Huang, Xian; Zhu, Jianxi; Wei, Tan Su; Liang, Xiaoliang; Chen, Meng

doi:10.18654/1000-0569/2019.01.09

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…The HRTEM images in Figure 2c,e show the presence of (210) and (200) crystal planes with a lattice spacing of 0.242 nm and 0.271 nm, respectively. He et al [31] pointed out that the (210) plane of pyrite is a sulfur-rich crystal plane, and in terms of surface structure properties, its oxidation rate is higher than the common (100) and (111) planes. Therefore, the exposure of more (210) planes promoted the activation of H 2 O 2 .…”

Section: Cs(nhmentioning

confidence: 99%

One-Pot Synthesis of Pyrite Nanoplates Supported on Chitosan Hydrochar as Fenton Catalysts for Organics Removal from Water

et al. 2022

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The Fenton reaction is a powerful method for removing refractory pollutants from water, yet it is restricted by shortcomings such as pH adjustments and generation of iron-containing sludge. In this study, a highly dispersed pyrite nanoplate supported on chitosan hydrochar was prepared through a simple one-pot hydrothermal method. The interactions between chitosan and Fe3+ suppressed the accumulation of FeS2 in the crystal growth period and led to the formation of pyrite nanoplates with many exposed (210) facets. Thus, it showed excellent Fenton-like activity and the removal efficiency of AR 73 reached 99.9% within 60 min. The catalyst could be used in a wide pH range of 3~10. Hydroxyl radicals are the main reactive oxygen species in this catalytic system. The self-reduction of generated Fe(III) species by sulfur via inner electron transfer promoted the Fe(II)/Fe(III) redox cycle, and the presence of graphene facilitated the adsorption of pollutants. This catalyst also showed good reuse performances as well as stability, which has promising prospects for practical use in wastewater treatment.

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Section: Cs(nhmentioning

confidence: 99%