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Facile synthesis and enhanced photocatalytic activity of single-crystalline nanohybrids for the removal of organic pollutants

机译：单晶纳米油脂的容易合成和增强的光催化活性去除有机污染物

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This study focused on the synthesis of alpha-MoO3/rGO (rGO, reduced graphene oxide). One-dimensional nanohybrids under mild conditions and a low temperature wet chemical route produced highly pure single-crystalline orthorhombic alpha-MoO3 on GO sheets. Four nanohybrids, labeled as GMO-0, GMO-1, GMO-2 and GMO-3, were synthesized with different mass chargings of GO (0 mg, 40 mg, 60 mg and 100 mg, respectively). The photocatalytic performance for reduction of organic pollutants was analyzed. The presence of different amounts of GO in the prepared metal oxide hybrids altered the performance of the material as elaborated by the Brunauer-Emmett-Teller surface area, UV-visible diffuse reflectance spectra and the resulting reduction of organic dyes depicted by photocatalytic experiments. GO as a support material and active co-catalyst decreased the band gap of alpha-MoO3 (2.82 eV) to lower values (2.51 eV), rendering the prepared hybrids usable for visible-light-induced photocatalysis. The large specific surface area (72 m(2) g(-1)) of the mesoporous alpha-MoO3/rGO nanohybrid made it an efficient photocatalyst for the elimination of azo dyes. Very fast reduction (100%) of Rhodamine B was observed in a few minutes, while Congo Red was degraded by 76% in 10 min, leading to the formation of stable intermediates that were completely neutralized in 12-14 h under light irradiation. The amount of GO loaded in the samples was limited to a point to achieve better results. After that, increasing the amount of GO decreased the extent of degradation due to the presence of a higher electron acceptor. Photocatalytic experiments revealed the synergistic effect, high selectivity of the prepared nanohybrids and degradation of azo dyes. The kinetics of the degradation reaction were studied and found to follow a pseudo first-order reaction.
机译：本研究重点是合成α-Moo3 / RGO（RGO，氧化石墨烯）的合成。温和条件下的一维纳米苞片和低温湿化学路线在去板上产生高纯纯的单晶正晶α-Moo3。标记为GMO-0，GMO-1，GMO-2和GMO-3的四种纳米冬次嗜含量，用GO（0mg，40mg，60mg和100mg）的不同质量充电合成。分析了用于减少有机污染物的光催化性能。在制备的金属氧化物杂种中存在不同量的去改变了由Brunauer-Emmett-exerse面积，UV可见漫射反射谱和由光催化实验所描绘的有机染料的所得有机染料的所得的材料的性能改变了材料的性能。作为支撑材料和活性助催化剂将α-MOO3（2.82eV）的带隙降低至较低的值（2.51eV），使制备的杂种可用于可见光诱导的光催化分析。中孔α-MOO3 / rgo纳米油的大的比表面积（72m（2）g（-1））使其成为消除偶氮染料的有效光催化剂。在几分钟内观察到非常快速的罗丹明B，而刚果红色在10分钟内降解76％，导致形成在12-14小时下在光照射中完全中和的稳定中间体。样品中加载的量限制为达到更好结果的点。之后，由于存在更高的电子受体，增加降低的降解量增加。光催化实验揭示了协同效应，制备的纳米胺的高选择性和偶氮染料的降解。研究了降解反应的动力学，发现并遵循伪第一阶反应。

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