BTZ-copolymer loaded graphene aerogel as new type Green and metal-free visible light photocatalyst
BTZ-copolymer loaded graphene aerogel as new type Green and metal-free visible light photocatalyst
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DOI：
10.1016/j.apcatb.2018.08.068
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
C. Tsang;J. Tobin;J. Xuan;F. Vilela;Haibao Huang;D. Leung
中科院分区：
文献类型：
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作者：
C. Tsang;J. Tobin;J. Xuan;F. Vilela;Haibao Huang;D. Leung
本文报道了一种新型高效、绿色、无金属的可见光催化剂，该催化剂由石墨烯气凝胶（GA）掺杂共轭多孔聚合物（CMPs）制成。因此，我们报道了一种基于苯并噻二唑（BTZ）的CMP的合成，该CMP在二维氧化石墨烯（GO）和CMP之间通过绿色工艺和温和条件一步水热反应进行。制备的GA在紫外-可见衍射反射光谱（DRS）吸收边沿上出现了向628.5 nm的色移，表明其具有可见光吸收能力。SEM， TEM， XPS， EDX图谱结果进一步表明btz基CMP在GA阵列上的成功加载。合成的GA作为三维结构光催化剂用于甲基橙（MO）的可见光驱动光分解，效率为89.2% （5 wt% CMP）。与纯CMP（86.9%）相比，观察到效率有相当但很小的提高。这是由于在整个温和的水热反应过程中，氧化石墨烯和负载在GA阵列中的聚合物通过BTZ-Py和GO之间的化学相互作用产生了协同作用，形成了CMPGA杂化结构，并且与20 mg纯聚合物相比，1 mg等效聚合物在CMPGA2杂化结构中表现出增强的光催化活性。重复使用后，光催化活性的衰减很低，在3个循环中下降<5%。这些结果表明，负载cmp的GA是一种高效的无金属光催化剂，具有进一步研究其他光催化应用的前景。
This paper reports a new class of efficient, green and metal-free visible-light photocatalyst made from graphene aerogel (GA) doped with a conjugated porous polymer (CMPs). Hence, we report the synthesis of a benzothiadiazole (BTZ)-based CMP loaded into GAviaa one-step hydrothermal reaction between 2D graphene oxide (GO) and the CMP, performed through a green process and under mild conditions. The as-prepared GA showed a bathochromic shift in the UV–vis diffraction reflectance spectroscopy (DRS) absorption edge to 628.5 nm, demonstrating its ability to absorb light in the visible region. SEM, TEM, XPS, EDX mapping results further showed the successful loading of the BTZ-based CMP in the GA array. The synthesized GA was used as a 3D structured photocatalyst for the visible-light-driven photodecomposition of methyl orange (MO) with an efficiency of 89.2% (5 wt% CMP). When compared to that of the pure CMP (86.9%), a comparable yet small increase in the efficiency was observed. This is due to a synergistic effect between GO and loaded polymer in GA array upon the formation of CMPGA hybrid structure via chemical interaction between BTZ-Py and GO throughout the mild hydrothermal reaction, and the enhanced photocatalytic activity exhibited from 1 mg equivalent polymer in the CMPGA2 hybrid when compared to the 20 mg pure polymer. Upon repeated use, the depreciation in photocatalytic activity was low with a <5% drop over 3 cycles. These results showed the CMP-loaded GA as an efficient metal-free photocatalyst and a promising material for further investigation into other photocatalytic applications.