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Fenton‐Type Oxidative Degradation of N , N ‐Diethyl‐ p ‐phenylenediamine by a Mesoporous Wormhole Structured FeTUD‐1 Catalyst
Author(s) -
Pachamuthu Muthusamy Poomalai,
Karthikeyan Sekar,
Sekaran Ganesan,
Maheswari Rajamanickam,
Ramanathan Anand
Publication year - 2015
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300747
Subject(s) - catalysis , mesoporous material , chemistry , leaching (pedology) , scanning electron microscope , sorption , kinetics , degradation (telecommunications) , nuclear chemistry , heterogeneous catalysis , diffuse reflectance infrared fourier transform , fourier transform infrared spectroscopy , inorganic chemistry , chemical engineering , materials science , organic chemistry , photocatalysis , quantum mechanics , computer science , soil science , engineering , composite material , telecommunications , environmental science , physics , adsorption , soil water
ABSTACT Interconnected, amorphous three dimensional, iron‐containing TUD‐1 (FeTUD‐1, Si/Fe = 25) mesoporous silica was subjected as a catalyst for degradation of refractory organic compound. The catalyst was prepared by economical, eco‐friendly sol–gel method and characterized by various techniques, such as X‐ray diffraction, N 2 sorption studies, diffuse reflectance UV‐Vis, Fourier transform IR, inductively coupled plasma optical emission spectrometry, scanning electron microscopy and electron paramagnetic resonance to understand the morphology and nature of the Fe species. The catalytic activity was evaluated by the oxidation of N , N ‐diethyl‐ p ‐phenylenediamine (DPD) with H 2 O 2 and air. All degradation studies were analyzed by UV‐Vis spectroscopy, chemical oxygen demand, and total organic carbon measurements. The effect of time, pH, H 2 O 2 concentration, and amount of FeTUD‐1 catalyst on the DPD degradation were also examined. Heterogeneous FeTUD‐1 showed a good catalytic performance than homogeneous FeSO 4 Fenton oxidation process. Besides, leaching of Fe (∼12%) was observed at pH 2. The reaction kinetics of FeTUD‐1 catalyzed degradation illustrates a first‐order kinetics. Possible degradation mechanism and formed products are discussed.