Microwave-Assisted Fabrication of Pd, Co and Ni Nanoparticles Modified-SiO2; as Catalysts in the Reduction Reaction of Organic Pollutants

Sevtap Çağlar Yavuz, Emre Yavuz, Serkan Dayan
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Abstract

Nanomaterials have been used in catalytic degradation of organic pollutants also act as catalysts in for many years. Due to excellent catalytic performances of metal-based nanoparticles, these materials have been used extensively in various hybrid catalyst synthesis. The main subject of this study, heterogeneous catalysis is a low cost and multi-purpose process for many pollutants. Catalytic degradation of organic pollutants such as; 2-Nitrophenol, Quinolin Yellow and Rhodamine B was investigated by using Ni, Co, Pd nanoparticles modified SiO2 based nanomaterials. The co-doping effect on the prepared nanomaterials has been investigated with different characterization methods in terms of structural and morphological features: scanning electron microscopy, UV/Vis absorption spectroscopy, energy-dispersive X-ray spectroscopy and foruier-transform infrared spectroscopy. The highest catalytic reduction efficiencies (97.6% and 97.5%) for 2-nitrophenol and Rhodamine B was obtained by Pd-PEG-AP@SiO2 respectively. The synthesized Co-PEG-AP@SiO2 illustrated higher catalytic reduction efficiency for Quinolin Yellow (70.1%) at the end of 60s. The prepared M-PEG-AP@SiO2 nanomaterial (M: Pd,Co,Ni) can be able to utilized degradation of organic contaminants effectively.
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微波辅助制备钯、钴和镍纳米颗粒修饰的二氧化硅;作为有机污染物还原反应的催化剂
多年来,纳米材料一直被用作催化降解有机污染物的催化剂。由于金属基纳米颗粒具有出色的催化性能,这些材料已被广泛用于各种混合催化剂合成。本研究的主要课题--异相催化是一种针对多种污染物的低成本、多用途工艺。通过使用镍、钴、钯纳米颗粒修饰的二氧化硅纳米材料,研究了 2-硝基苯酚、喹啉黄和罗丹明 B 等有机污染物的催化降解。通过扫描电子显微镜、紫外/可见吸收光谱、能量色散 X 射线光谱和傅立叶变换红外光谱等不同的表征方法,研究了共掺杂对所制备纳米材料结构和形态特征的影响。Pd-PEG-AP@SiO2 对 2-硝基苯酚和罗丹明 B 的催化还原效率最高(分别为 97.6% 和 97.5%)。合成的 Co-PEG-AP@SiO2 在 60 秒结束时对喹啉黄的催化还原效率更高(70.1%)。所制备的 M-PEG-AP@SiO2 纳米材料(M:Pd、Co、Ni)能够有效地降解有机污染物。
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