Topic
Benzoic acid
About: Benzoic acid is a research topic. Over the lifetime, 11832 publications have been published within this topic receiving 167127 citations. The topic is also known as: Retardex & E210.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the photocatalytic degradation of 4-methylbenzoic acid (MBA) and 2-chloro-5-nitro benzoic acids (CNBA) as aqueous solution mixture was studied using ZnO-SnO 2 /nano-clinoptilolite under UV irradiation.
Abstract: The photocatalytic degradation of 4-methylbenzoic acid (MBA) and 2-chloro-5-nitro benzoic acid (CNBA) as aqueous solution mixture was studied using ZnO–SnO 2 /nano-clinoptilolite under UV irradiation. The clinoptilolite nano-particles (CNP) were obtained via ball-mill method and ion exchanged in Zn 2+ –Sn 4+ aqueous solutions with different concentrations. The ion exchanged samples (Zn(II)–Sn(IV)/CNP) were calcined at 450 °C for 12 h to obtain ZnO–SnO 2 /CNP catalysts. XRD, DRS, FT-IR and TEM techniques were applied for characterization of samples. The experimental parameters which influenced degradation process were optimized and the optimum values were obtained as: 1 g L −1 of the photocatalyst, pH 5 and 5 mg L −1 of MBA and CNBA in the mixture. The degradation/ mineralization extents were confirmed by COD and HPLC.
107 citations
TL;DR: Addition d'acides acetique ou benzoique sur les diphenyl-1,2 and phenyl-acetylenes as discussed by the authors, ou des acetates d'α-and β-phenyl styryle
106 citations
TL;DR: In this paper, the antioxidant properties of 14 different benzoic acid derivatives against superoxide radical were determined by Beauchamp and Fridovich methods, and the relationship between structure and antioxidant activity of the compounds was studied.
106 citations
TL;DR: One prenylated benzoic acid derivative, 3-prenyl-4-O-β-d-glucopyranosyloxy 4-hydroxylbenzoic acids, and three known constituents, catechin, protocatechuic acid, and ursolic acid, have been isolated from the hulls of almond (Prunus amygdalus) as mentioned in this paper.
Abstract: One new prenylated benzoic acid derivative, 3-prenyl-4-O-β-d-glucopyranosyloxy-4-hydroxylbenzoic acid, and three known constituents, catechin, protocatechuic acid, and ursolic acid, have been isolated from the hulls of almond (Prunus amygdalus) Complete assignments of the proton and carbon chemical shifts for the new prenylated benzoic acid derivative were accomplished on the basis of high-resolution 1D and 2D nuclear magnetic resonance data All of these compounds except ursolic acid are being reported from almond hulls (P amygdalus) for the first time Keywords: Almond hulls; Prunus amygdalus; prenylated benzoic acid derivative
105 citations
TL;DR: The first time the whole MG photodegradation processes have been reported, including the N-demethylation process, adduct products of the hydroxyl radical, the breakdown of chromophores such as destruction of the conjugated structure intermediate, removal of benzene, and an open-ring reaction are reported.
Abstract: Microwave-assisted photocatalytic (MPC) degradation of malachite green (MG) in aqueous TiO2 suspensions was investigated. A 20 mg/L sample of MG was rapidly and completely decomposed in 3 min with the corresponding TOC removal efficiency of about 85%. To gain insight into the degradation mechanism, both GC-MS and LC-ESI-MS/MS techniques were employed to identify the major intermediates of MG degradation, including N-demethylation intermediates [(p-dimethylaminophenyl)(p-methylaminophenyl)phenylmethylium (DM-PM), (p-methylaminophenyl)(p-methylaminophenyl)phenylmethylium (MM-PM), (p-methylaminophenyl)(p-aminophenyl)phenylmethylium (M-PM)]; a decomposition compound of the conjugated structure (4-dimethylaminobenzophenone (DLBP)); products resulting from the adduct reaction of hydroxyl radical; products of benzene removal; and other open-ring intermediates such as phenol, terephthalic acid, adipic acid, benzoic acid, etc. The possible degradation mechanism of MG included five processes: the N-demethylation process, adduct products of the hydroxyl radical, the breakdown of chromophores such as destruction of the conjugated structure intermediate, removal of benzene, and an open-ring reaction. To the best of our knowledge, it is the first time the whole MG photodegradation processes have been reported.
105 citations