A novel nanokaolinite photocatalyst for degradation of P-nitrophenol

2017 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) Pub Date : 2017-08-01 DOI:10.1109/3M-NANO.2017.8286281

S. El-Sheikh, A. Shawky, Sabrin M. Abdo, Thanaa I. El-Dosoqy, Mohamed Nageeb Rashad

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Abstract

Nanokaolinite photocatalyst was successfully prepared from bulk kaolinite by using simple intercalation-delamination method. The obtained nanokaolinite photocatalysts have been characterized by X-ray diffraction (XRD), FTIR analysis, transmission electron microscope (TEM), and UV-VIS diffuse reflectance spectroscopy (DRS). The XRD revealed that the layers of bulk kaolinite were exfoliated to form nanokaolinite with crystallite size ∼26–32 nm. FTIR spectra showed the presence of nitrogen species between nanokaolinite layers, which lead to decrease of band gap of as-prepared samples as estimated from DRS. The photocatalytic degradation of P-Nitrophenol (PNP) was investigated using the as-prepared nanokaolinite photocatalysts under UV irradiation. The optimum nanokaolinite sample using urea as intercalating agent shows a complete photodegradation of PNP within 30 minutes. This novel nanokaolinite photocatalyst represents an extraordinary alternate for oxide-based photocatalysts.

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一种新型纳米高岭石光催化剂降解对硝基苯酚

以大块高岭石为原料，采用简单的插层-分层法制备了纳米高岭石光催化剂。采用x射线衍射(XRD)、红外光谱(FTIR)、透射电子显微镜(TEM)和紫外-可见漫反射光谱(DRS)对制备的纳米高岭石光催化剂进行了表征。XRD分析表明，块状高岭石被剥离形成纳米高岭石，晶粒尺寸为~ 26 ~ 32 nm。FTIR光谱显示，纳米高岭石层间存在氮物质，使得制备样品的带隙减小。研究了制备的纳米高岭石光催化剂在紫外照射下对硝基苯酚(PNP)的光催化降解。以尿素为插层剂的最佳纳米高岭土样品在30分钟内可完全光降解PNP。这种新型纳米高岭石光催化剂代表了氧化物基光催化剂的非凡替代品。

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2017 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

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