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Ag2S-Sensitized NiO-ZnO Heterostructures with Enhanced Visible Light Photocatalytic Activity and Acetone Sensing Property.
ACS Omega ( IF 3.7 ) Pub Date : 2019-07-31 , DOI: 10.1021/acsomega.9b01261 Adil Shafi 1 , Nafees Ahmad 1 , Saima Sultana 1 , Suhail Sabir 1 , Mohammad Zain Khan 1
ACS Omega ( IF 3.7 ) Pub Date : 2019-07-31 , DOI: 10.1021/acsomega.9b01261 Adil Shafi 1 , Nafees Ahmad 1 , Saima Sultana 1 , Suhail Sabir 1 , Mohammad Zain Khan 1
Affiliation
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Visible light-driven Ag2S-grafted NiO-ZnO ternary nanocomposites are synthesized using a facile and cost-effective homogeneous precipitation method. The structural, morphological, and optical properties were extensively studied, confirming the formation of ternary nanocomposites. The surface area of the synthesized nanocomposites was calculated by electrochemical double-layer capacitance (C dl). Ternary Ag2S/NiO-ZnO nanocomposites showed excellent visible light photocatalytic property which increases further with the concentration of Ag2S. The maximum photocatalytic activity was shown by 8% Ag2S/NiO-ZnO with a RhB degradation efficiency of 95%. Hydroxyl and superoxide radicals were found to be dominant species for photodegradation of RhB, confirmed by scavenging experiments. It is noteworthy that the recycling experiments demonstrated high stability and recyclable nature of the photocatalyst. Moreover, the electrochemical results indicated that the prepared nanocomposite exhibits remarkable activity toward detection of acetone. The fabricated nanocomposite sensor showed high sensitivity (4.0764 μA mmol L-1 cm-2) and a lower detection limit (0.06 mmol L-1) for the detection of acetone. The enhanced photocatalytic and the sensing property of Ag2S/NiO-ZnO can be attributed to the synergistic effects of strong visible light absorption, excellent charge separation, and remarkable surface properties.
中文翻译：
Ag2S 敏化 NiO-ZnO 异质结构具有增强的可见光光催化活性和丙酮传感性能。
采用简便且经济高效的均匀沉淀法合成了可见光驱动的 Ag2S 接枝 NiO-ZnO 三元纳米复合材料。对结构、形态和光学性质进行了广泛的研究，证实了三元纳米复合材料的形成。通过电化学双层电容（C dl）计算合成的纳米复合材料的表面积。三元Ag2S/NiO-ZnO纳米复合材料表现出优异的可见光光催化性能，并且随着Ag2S浓度的增加而进一步增强。8% Ag2S/NiO-ZnO 表现出最大的光催化活性，RhB 降解效率为 95%。清除实验证实，羟基和超氧自由基是 RhB 光降解的主要物质。值得注意的是，回收实验证明了光催化剂的高稳定性和可回收性。此外，电化学结果表明所制备的纳米复合材料对丙酮的检测表现出显着的活性。所制备的纳米复合传感器对丙酮的检测表现出高灵敏度（4.0764 μA mmol L-1 cm-2）和较低的检测限（0.06 mmol L-1）。Ag2S/NiO-ZnO 增强的光催化和传感性能可归因于强可见光吸收、优异的电荷分离和卓越的表面性能的协同效应。
更新日期：2019-07-31
中文翻译：
Ag2S 敏化 NiO-ZnO 异质结构具有增强的可见光光催化活性和丙酮传感性能。
采用简便且经济高效的均匀沉淀法合成了可见光驱动的 Ag2S 接枝 NiO-ZnO 三元纳米复合材料。对结构、形态和光学性质进行了广泛的研究，证实了三元纳米复合材料的形成。通过电化学双层电容（C dl）计算合成的纳米复合材料的表面积。三元Ag2S/NiO-ZnO纳米复合材料表现出优异的可见光光催化性能，并且随着Ag2S浓度的增加而进一步增强。8% Ag2S/NiO-ZnO 表现出最大的光催化活性，RhB 降解效率为 95%。清除实验证实，羟基和超氧自由基是 RhB 光降解的主要物质。值得注意的是，回收实验证明了光催化剂的高稳定性和可回收性。此外，电化学结果表明所制备的纳米复合材料对丙酮的检测表现出显着的活性。所制备的纳米复合传感器对丙酮的检测表现出高灵敏度（4.0764 μA mmol L-1 cm-2）和较低的检测限（0.06 mmol L-1）。Ag2S/NiO-ZnO 增强的光催化和传感性能可归因于强可见光吸收、优异的电荷分离和卓越的表面性能的协同效应。
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