Academy of Scientific and Innovative Research, New Delhi, India.
Colloids and Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar-, 751 013, Odisha, India.
Chem Asian J. 2016 Feb 18;11(4):584-95. doi: 10.1002/asia.201501286. Epub 2016 Jan 8.
A visible light driven, direct Z-scheme reduced graphene oxide-Ag3PO4 (RGO-Ag3 PO4 ) heterostructure was synthesized by means of a simple one-pot photoreduction route by varying the amount of RGO under visible light illumination. The reduction of graphene oxide (GO) and growth of Ag3PO4 took place simultaneously. The effect of the amount of RGO on the textural properties and photocatalytic activity of the heterostructure was investigated under visible light illumination. Furthermore, total organic carbon (TOC) analysis confirmed 97.1 % mineralization of organic dyes over RGO-Ag3PO4 in just five minutes under visible-light illumination. The use of different quenchers in the photomineralization suggested the presence of hydroxyl radicals ((.)OH), superoxide radicals ((.)O2 (-)), and holes (h(+)), which play a significant role in the mineralization of organic dyes. In addition to that, clean hydrogen fuel generation was also observed with excellent reusability. The 4 RGO-Ag3PO4 heterostructure has a high H2 evolution rate of 3690 μmol h(-1) g(-1), which is 6.15 times higher than that of RGO.
一种可见光驱动的直接 Z 型还原氧化石墨烯- Ag3PO4（RGO-Ag3PO4）杂化结构是通过在可见光照射下通过改变 RGO 的用量，采用简单的一锅光还原法合成的。氧化石墨烯（GO）的还原和 Ag3PO4 的生长同时发生。研究了 RGO 用量对可见光照射下杂化结构的织构性质和光催化活性的影响。此外，TOC 分析证实，在可见光照射下，仅 5 分钟内，RGO-Ag3PO4 就可将有机染料完全矿化为无机物，矿化率达 97.1%。在光矿化过程中使用不同的猝灭剂表明存在羟基自由基((.)OH)、超氧自由基((.)O2(-))和空穴(h(+))，它们在有机染料的矿化过程中起着重要作用。此外，还观察到清洁的氢气燃料生成，且具有优异的可重复使用性。4RGO-Ag3PO4 杂化结构的 H2 释放速率高达 3690μmolh(-1)g(-1)，是 RGO 的 6.15 倍。
