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g-C3N4/MgO nanosheets: light-independent, metal-poisoning-free catalysts for the activation of hydrogen peroxide to degrade organics†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-07-30 00:00:00 , DOI: 10.1039/c8ta05488f Lifa Ge 1, 2, 3, 4 , Ziling Peng 4, 5, 6, 7, 8 , Wei Wang 1, 2, 3, 4 , Fatang Tan 1, 2, 3, 4 , Xinyun Wang 1, 2, 3, 4 , Bin Su 9, 10, 11, 12 , Xueliang Qiao 1, 2, 3, 4 , Po Keung Wong 4, 13, 14
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-07-30 00:00:00 , DOI: 10.1039/c8ta05488f Lifa Ge 1, 2, 3, 4 , Ziling Peng 4, 5, 6, 7, 8 , Wei Wang 1, 2, 3, 4 , Fatang Tan 1, 2, 3, 4 , Xinyun Wang 1, 2, 3, 4 , Bin Su 9, 10, 11, 12 , Xueliang Qiao 1, 2, 3, 4 , Po Keung Wong 4, 13, 14
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The huge amount of organic wastewater produced by dye manufacturing/consuming industries causes serious environmental pollution, which urges researchers to explore highly efficient and cost-effective Fenton-like catalysts. Herein, we report the synthesis of g-C3N4/MgO nanosheets through a simple two-step calcination method, exhibiting the excellent catalytic ability of activating hydrogen peroxide to degrade organic dyes in the dark. The results of this study indicate that the g-C3N4/MgO nanosheets are light-independent and metal-poisoning-free Fenton-like catalysts for enhanced degradation of organics. The efficient degradation performance is attributed to hydroxyl radical generation in the g-C3N4/MgO–H2O2 catalytic system. The bonding between the MgO and g-C3N4 parts of the g-C3N4/MgO nanosheets is considered to be a key role in activating H2O2 to produce a hydroxyl radical. This catalytic degradation process can be conducted in a wide pH range and at room temperature without external energy input. Additionally, the g-C3N4/MgO nanosheets are non-toxic, low-cost and easy to prepare. Therefore, it is reasonable to believe that g-C3N4/MgO nanosheets have a great potential in the catalytic degradation of organic contaminants and could be used in a wide range of environmental cleanup applications. Furthermore, this work provides an insight into exploiting novel Fenton-like catalysts without transition metal components or external energy excitation.
中文翻译：
gC 3 N 4 / MgO纳米片：不依赖光，无金属中毒的催化剂，用于活化过氧化氢以降解有机物†
染料制造/消费行业产生的大量有机废水导致严重的环境污染，这促使研究人员探索高效且具有成本效益的类Fenton催化剂。在这里，我们报告通过简单的两步煅烧方法合成gC 3 N 4 / MgO纳米片，表现出出色的催化活性，能够激活过氧化氢在黑暗中降解有机染料。这项研究的结果表明，gC 3 N 4 / MgO纳米片是不依赖光且无金属中毒的Fenton状催化剂，可增强有机物的降解。有效的降解性能归因于gC 3 N中的羟基自由基生成4 / MgO–H 2 O 2催化系统。gC 3 N 4 / MgO纳米片的MgO和gC 3 N 4部分之间的键合被认为是活化H 2 O 2产生羟基自由基的关键作用。该催化降解过程可在宽pH范围和室温下进行，而无需外部能量输入。另外，gC 3 N 4 / MgO纳米片无毒，低成本且易于制备。因此，有理由相信gC 3 N 4/ MgO纳米片在有机污染物的催化降解方面具有巨大潜力，可用于广泛的环境清洁应用中。此外，这项工作为开发新型Fenton类催化剂而无需过渡金属成分或外部能量激发提供了见识。
更新日期：2018-07-30
中文翻译：
gC 3 N 4 / MgO纳米片：不依赖光，无金属中毒的催化剂，用于活化过氧化氢以降解有机物†
染料制造/消费行业产生的大量有机废水导致严重的环境污染，这促使研究人员探索高效且具有成本效益的类Fenton催化剂。在这里，我们报告通过简单的两步煅烧方法合成gC 3 N 4 / MgO纳米片，表现出出色的催化活性，能够激活过氧化氢在黑暗中降解有机染料。这项研究的结果表明，gC 3 N 4 / MgO纳米片是不依赖光且无金属中毒的Fenton状催化剂，可增强有机物的降解。有效的降解性能归因于gC 3 N中的羟基自由基生成4 / MgO–H 2 O 2催化系统。gC 3 N 4 / MgO纳米片的MgO和gC 3 N 4部分之间的键合被认为是活化H 2 O 2产生羟基自由基的关键作用。该催化降解过程可在宽pH范围和室温下进行，而无需外部能量输入。另外，gC 3 N 4 / MgO纳米片无毒，低成本且易于制备。因此，有理由相信gC 3 N 4/ MgO纳米片在有机污染物的催化降解方面具有巨大潜力，可用于广泛的环境清洁应用中。此外，这项工作为开发新型Fenton类催化剂而无需过渡金属成分或外部能量激发提供了见识。
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