Fe(III)-Citrate-Complex-Induced Photooxidation of 3-Methylphenol in Aqueous Solution

Abstract

The photodegradation process of m-cresol (3-methylphenol), induced by Fe(III)-Cit complex, was investigated upon irradiation at 365 nm in natural water. The composition and photochemical properties of Fe(III)-Cit complex were studied by UV-Visible absorption spectrophotometer for optimizing the stoichiometry of the complex and photolysis under irradiation at 365 nm, respectively. A dark investigation of the system was performed before studying the photochemical behavior. The photooxidation efficiencies of m-cresol were dependent on the pH value, optimized at pH 2.86, oxygen, initial concentrations of Fe(III)-Cit complex, and m-cresol. Additionally, to look into the mechanism of m-cresol degradation using Fe(III)-Cit, tertiobutanol alcohol was used as scavenger for hydroxyl radicals and the result suggested that hydroxyl radical attack was the main pathway of m-cresol degradation. Besides, oxygen can enhance the photolysis of Fe(III)-Citrate complex by trapping the electron on the carbon centered radical formed after the photoredox process. Then O2•−formed reacts rapidly leading finally to formation of•OH radical. In absence of oxygen, less reactive species are formed; consequently the disappearance of m-cresol was strongly inhibited. Our work shows that the presence of Fe(III)-Citrate complex could have a considerable impact on the fate of organic pollutant in aquatic environment.

Metal Organic Frameworks: A New Generation Coordination Polymers for Visible Light Photocatalysis

“…Visible light photo response is impossible with zeolites or alumino silicates without impurities, as they do not absorb visible light with the inorganic semiconductor . NH 2 substitution in either of 1,4‐benzenedicarboxylic acid or aromatic Polycarboxylate helps to insert a fresh band in the visible region having the λ max at 400 nm . This is to be noted that same technique can be followed for the synthesis of both the un‐substituted or amine substituted MOF which are iso‐structural to each other.…”

“…[75] NH 2 substitution in either of 1,4-benzenedicarboxylic acid or aromatic Polycarboxylate helps to insert a fresh band in the visible region having the l max at 400 nm. [76] This is to be noted that same technique can be followed for the synthesis of both the un-substituted or amine substituted MOF which are iso-structural to each other. Visible light photo response is possible by choosing either porphyrin or polypyridyl as linker.…”

Creation of Hybrid Photoactive Inorganic/Organic Interface Assemblies of Cadmium Oxide mixtures (CdO2/CdO)/Poly-2,2-Bithiophene; Optical and Photoelectrochemical Investigations

“…et al 1993) except in the 2.2-2.7 eV photon energy range that matches the PBTh band gap. The contribution of the dopant to the charge transfer process was explained on a basis that the reaction between incident light and charges of the material will take place as a result of absorption of photon energy by the assembly (Seraghni N. et al, 2012). The presence of CdO 2 /CdO enhanced the process that leads to polarizing the charges of the material.…”

“…During its lifetime, this anion radical acted as a temporary molecular paramagnet (Seraghni N. et al 2012) that interfered with the applied a magnetic field and generated the recorded photocurrent outcome as shown in Figures 7-9. …”

A new atomic absorption-based method development for indirect determination of histamine in fish samples, dairy products, and alcoholic beverages by flame AAS

“…[35][36][37] Also, it was observed that Fe 3+ ions gave a stable complex with chlorphenamine, having a similar structure to histamine, at pH 6.0 (log b: 3.6 at ratio of 1 : 1). For this purpose, preliminary experiments were carried out with metal ions including Fe(III), Cu(II), and Sn(IV) at isomolar concentrations.…”