Synthesis and Dye Degradation Properties of Cu2+ Complexes with Benzimidazole Derivatives

2013 ◽  
Vol 726-731 ◽  
pp. 2449-2452 ◽  
Author(s):  
Yin Zhi Jiang ◽  
Yong Qiang Shi ◽  
Lian Zhu Tian ◽  
Huo Ying Xu
Keyword(s):  
Methyl Orange ◽  
Ir Spectra ◽  
Dye Degradation ◽  
Degradation Products ◽  
Hplc Method ◽  
Uv Spectra ◽  
Benzimidazole Derivatives ◽  
Coordination Sites ◽  
Degradation Properties ◽  
Degradation Of Methyl Orange

Six benzimidazole derivatives were synthesized and charactrized by IR spectra, 1H-NMR spectra and MS spectra. The coordination reaction of the derivatives with CuCl2. And six novel Cu (II) complexes with the derivatives were prepared and characterized by UV spectra, IR spectra and elemental analysis. The catalytic degradation of methyl orange aqueous solution was investigated using the complexes as catalysis in presence H2O2 by HPLC method and Vis-spectrophotometry. The result of characterization showed that there are four coordination sites around Cu (II) in all complexes, which are respectively occupied by one sulfur atom (from the derivative), one nitrogen atom (from the derivative), one oxygen atom ( from the OH-) and one chlor atom (from the Cl-). The degradation of methyl orange indicated that all the complexes show the properties of enzyme activity. And the main degradation products determined were hydroquinone and maleic acid.

Photocatalytic Degradation of Methyl Orange Dye with Synthesized Chitosan/Fe2O3Nanocomposite and its Isotherm Studies.

2020 ◽  
Vol 16 ◽  
Author(s):  
Nimisha Jadon ◽  
Gulzar Ahmad Bhat ◽  
Manoharmayum Vishwanath Sharma ◽  
Harendra Kumar Sharma
Keyword(s):  
Methyl Orange ◽  
Dye Degradation ◽  
Dose Effect ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Vis Spectroscopy ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

Background: The study focuses on the synthesis of chitosan/ Fe2O3 nanocomposite, its characterization and application in methyl orange dye degradation. Methods: The synthesized chitosan/ Fe2O3 nanocomposite was characterized with Powder X-Ray Diffraction, Fourier Transformation Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM) and UV-Vis Spectroscopy. Results: The characterization showed that the Fe2O3nanoparticles were embedded in the polymer matrix of chitosan. The size of the Fe2O3nanoparticles were less than 10nm and the crystallite size was 1.22 nm.The synthesized chitosan/ Fe2O3nanocomposite was tested for methyl orange degradation using different parameters such as effect of contact time, effect of dose, effect of concentration and effect of pH for the degradation of methyl orange dye in aqueous solution.The Fruendlich, Langmuir and Temkin isotherm studies were also conducted for adsoption of methyl orange on Chitosan/ Fe2O3nanocomposite. Conclusion: The study indicated that the synthesized chitosan/Fe2O3 nanocomposite had the potential of degrading methyl orange dye up to 75.04% under the set condition in this experiment which indicate that Chitosan/ Fe2O3 nanocomposite is a viable option that can be used for the degradation of methyl orange dye.

Photosensitization of Nitrogen Doped TiO2 Nanoparticles with Na-Chlorophyllin Copper for Degradation of Methyl Orange

2011 ◽  
Vol 343-344 ◽  
pp. 216-221
Author(s):  
Jian Yu Gong ◽  
Chang Zhu Yang ◽  
Wen Hong Pu ◽  
Jing Dong Zhang
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Light Illumination ◽  
Nitrogen Doped ◽  
Photoelectrocatalytic Degradation ◽  
Visible Light Illumination ◽  
Doped Titanium Dioxide ◽  
Degradation Properties ◽  
Degradation Of Methyl Orange ◽  
Nitrogen Doped Titanium Dioxide

Nitrogen doped titanium dioxide nanoparticals (N-TiO2) were prepared by the sol-hydrothermal method using urea as N sources. SEM showed the sphericity of as-prepared nanoparticals. XRD indicated that N-TiO2 was anatase crystal after thermal treatment. While Na-chlorophyllin copper (Na-chl-Cu) was used as to sensitize the N-TiO2, the photocurrent of Na-chl-Cu/N-TiO2 was 50 ìA double than that of N-TiO2 under visible light illumination. Thus, the visible light photoelectrocatalytic degradation properties of Na-chl-Cu/N-TiO2 were investigated using methyl orange (MO) as the objective pollution. When 1.8 V anodic bias potential and visible light were simultaneously applied, the highest degradation efficiency of MO over the Na-chl-Cu/N-TiO2 was obtained.

Photocatalytic Performance of Polyoxometallate Intercalated Layered Double Hydroxide

2010 ◽  
Vol 663-665 ◽  
pp. 187-190 ◽  
Author(s):  
Yu Hui Zhang ◽  
Ji Xin Su ◽  
Xiao Peng Wang ◽  
Qi Pan ◽  
Wen Qu
Keyword(s):  
Methyl Orange ◽  
Ir Spectra ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation ◽  
Ft Ir ◽  
Double Hydroxide ◽  
Degradation Of Methyl Orange

Based on X-ray diffraction results, the gallery height of modified Mg3Al-LDH was expanded to 9.6Å from the original 4.8Å, indicating that the H3PW12O40 was indeed inserted into the hydroxide layers. Moreover, the results of FT-IR spectra proved the Keggin structure of PW11O397- species. The resulting material showed a high activity of degradation of methyl orange in the presence of H2O2 and UV light irradiation.

scholarly journals A Simple g-C3N4/TNTs Heterojunction for Improving the Photoelectrocatalytic Degradation of Methyl Orange

2021 ◽  
Author(s):  
Linsheng Zeng ◽  
Zichun He ◽  
Yongping Luo ◽  
Jitao Xu ◽  
Jiansheng Chen ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Carbon Nitride ◽  
Degradation Rate ◽  
Nanotube Arrays ◽  
Photoelectrocatalytic Degradation ◽  
Titanium Dioxide Nanotube Arrays ◽  
Anodic Oxidation Method ◽  
Degradation Properties ◽  
Degradation Of Methyl Orange ◽  
Effect Of Light

Abstract In this work, highly ordered titanium dioxide nanotube arrays (TNTs) were first prepared by anodic oxidation method. Then, g-C3N4/TNTs heterojunctions were prepared by ultrasonically loading graphitic carbon nitride (g-C3N4) onto the TNTs. The morphology and crystal structure of TNTs and g-C3N4/TNTs were characterized by SEM and XRD. The photoelectrocatalytic (PEC) degradation of methyl orange (MO) by TNTs and g-C3N4/TNTs was studied in a PEC degradation system. The photocatalytic (PC), electrocatalytic (EC), and PEC degradation properties were compared, and the effect of pollutant concentration on the degradation performance of the catalysts was analyzed. According to the experimental results, the degradation rate of MO with TNTs only reaches 65.1% after 120 min, while the degradation rate of MO with g-C3N4/TNTs reaches 84.6% in the same time. Due to the synergistic effect of light and electricity, the PEC degradation efficiency of the two catalysts is greater than the sum of PC and EC degradation, proving that g-C3N4/TNTs heterojunctions provide excellent PEC performance for the degradation of MO.

Adsorption and Photocatalytic Degradation of Methyl Orange on TiO2 and CuZSM-5 Mixture

2011 ◽  
Vol 48-49 ◽  
pp. 149-152
Author(s):  
Li Li Yang ◽  
Jin Lei Chen ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Pure Tio2 ◽  
Optimum Ratio ◽  
Experimental Conditions ◽  
Degradation Properties ◽  
Decoloration Rate ◽  
Degradation Of Methyl Orange

TiO2 and CuZSM-5 were mixed together as photocatalyst in dealing with photocatalytic degradation of methyl orange. Adsorption and photocatalytic degradation properties of the CuZSM-5 zeolite and mixture of TiO2 and CuZSM-5 were investigated. The CuZSM-5 zeolite has no photocatalytic activity under the experimental conditions. Methyl orange decoloration rate was 65.4%, which was 9.60% higher than that without using CuZSM-5, when TiO2 and CuZSM-5 were at the optimum ratio of 3.13:1. An optimum TiO2 concentration of 250 mg/l occurred when using pure TiO2. However, when using TiO2-CuZSM-5 mixture, the decoloration rate continuously increased with increasing photocatalyst concentration. After 70 min of irradiation, 98.4% of the initial methyl orange decoloration was found using TiO2-CuZSM-5 mixture at TiO2 concentration of 250 mg/l.

scholarly journals Photocatalytic Dye and Cr(VI) Degradation Using a Metal-Free Polymeric g-C3N4 Synthesized from Solvent-Treated Urea

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 182 ◽  
Author(s):  
Chechia Hu ◽  
Yi-Ching Chu ◽  
Yan-Ru Lin ◽  
Hung-Chun Yang ◽  
Ke-Hsuan Wang
Keyword(s):  
Methyl Orange ◽  
Hexavalent Chromium ◽  
Lattice Strain ◽  
Dye Degradation ◽  
First Order ◽  
Crystal Imperfection ◽  
Visible Light Driven ◽  
Small Lattice ◽  
Photocatalytic Dye Degradation ◽  
Degradation Of Methyl Orange

The development of visible-light-driven polymeric g-C3N4 is in response to an emerging demand for the photocatalytic dye degradation and reduction of hexavalent chromium ions. We report the synthesis of g-C3N4 from urea treated with various solvents such as methanol, ethanol, and ethylene glycol. The samples were characterized and the Williamson–Hall method was applied to investigate the lattice strain of the samples. The activity of the samples was evaluated by observing the degradation of methyl orange and K2Cr2O7 solution under light irradiation. Photocatalytic reaction kinetics were determined as pseudo-first-order and zero-order for the degradation of methyl orange and reduction of hexavalent chromium, respectively. Due to the inhibited charge separation resulting from the small lattice strain, reduced crystal imperfection, and sheet-like structure, g-C3N4 obtained from ethanol-treated urea exhibited the highest activity among the evaluated samples.

Synthesis and Characterization of Potential and Degraded Impurities of Regadenoson

2020 ◽  
Vol 16 (8) ◽  
pp. 1130-1139
Author(s):  
Singaram Sathiyanarayanan ◽  
Chidambaram Subramanian Venkatesan ◽  
Senthamaraikannan Kabilan
Keyword(s):  
Mass Spectra ◽  
Degradation Products ◽  
Hplc Method ◽  
Forced Degradation ◽  
Spectroscopic Techniques ◽  
A2a Adenosine Receptor ◽  
Degradation Study ◽  
Related Substances ◽  
Adenosine Receptor Agonist

Background: Regadenoson is an A2A adenosine receptor agonist that is a coronary vasodilator and commonly used as a pharmacologic cardiac stressing agents. Methods: HPLC method was used for the analysis of related substances. The degraded impurities during the process were isolated and characterized by IR, Mass and NMR spectral analysis. Results: Forced degradation study of regadenoson under conditions of hydrolysis (neutral, acidic and alkaline) and oxidations suggested in the ICH Q1A(R2) was accomplished. The drug showed significant degradation under all the above conditions. On the whole, five novel degradation products were found under diverse conditions along with process related impurities which were not reported earlier. Conclusion: All the degradation products were well characterized by using advanced spectroscopic techniques like IR, 1H NMR, 13C NMR and Mass spectra. The identification of these impurities will be productive for the quality control during the production and stability behavior of the regadenoson drug substance.

scholarly journals Development and Validation of Stability-Indicating RP-HPLC Method for the Estimation of Lenalidomide and its Impurities in Oral Solid Dosage Form

2019 ◽  
Vol 35 (1) ◽  
pp. 140-149 ◽  
Author(s):  
Somana Siva Prasad ◽  
G. V. Krishna Mohan ◽  
A. Naga Babu
Keyword(s):  
Limit Of Detection ◽  
Degradation Products ◽  
Pharmaceutical Formulations ◽  
Hplc Method ◽  
Stability Robustness ◽  
Rp Hplc ◽  
Mobile Phases ◽  
Limit Of Quantitation ◽  
Successful Separation ◽  
Quality By Design Approach

In this study, a novel, simple and precise RP-HPLC method has been developed for the quantitative analysis of Lenalidomide (LLM) in pharmaceutical formulations using analytical quality by design approach. An X-bridge-C18 column (150 mm × 4.6 mm × 3.5 µ) with mobile phases containing a Potassium dihydrogen orthophosphate anhydrous buffer and methanol in the ratio of (90:10 v/v) and (35:65 v/v) are used for the estimation of LLM and its degradation products. The flow rate of 0.8 mL/min is maintained and all degradation studies are performed at 210 nm using photodiode array (PDA) detector. Method Validation is carried out according to International Council for Harmonisation (ICH) guidelines and the parameters namely; precision, accuracy, specificity, stability, robustness, linearity, limit of quantitation (LOQ) and limit of detection (LOD) are evaluated. The present developed RP-HPLC method shows the purity angle of peaks is less than their threshold angle, signifying that it to be suitable for stability studies. Hence, the developed method can be used for the successful separation of LLM and its impurities in the pharmaceutical dosage formulations.

Degradation of methyl orange by a new catalyst glyphosate ferrous

2019 ◽  
Vol 95 ◽  
pp. 105933
Author(s):  
Guohui Wang ◽  
Ruiqi Huang ◽  
Annan Zhou ◽  
Qinghong Xu
Keyword(s):  
Methyl Orange ◽  
Degradation Of Methyl Orange
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