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Kinetics studies on photodegradation of methyl orange in the presence of C-N-codoped TiO2 catalyst

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Last updated: 01 Jan 2025

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Tags

Environmental chemistry

Abstract

This work investigated the photodegradation of azo dye, methyl orange, without and with the addition of C-N-codoped TiO2 catalyst using a visible halogen-lamp as a light source. C-N-codoped TiO2 was prepared by free-organic solvent peroxo sol-gel method. The effects of initial dye concentration, catalyst dosage, and pH solution on the photodegradation of methyl orange were studied. Photodegradation process for methyl orange solution at acidic condition showed high removal percentage. 5 mg L-1 methyl orange achieved color removal until 94% for 180 min irradiation in photodegradation process with the presence of C-N-codoped TiO2 catalyst, and approximately 70% TOC removed as the results of mineralization process. The kinetics reaction rate of photodegradation of methyl orange dye with the addition of C-N-codoped TiO2 followed pseudo-first order represented by Langmuir-Hinshelwood model, the kinetics constant of photodegradation became higher by decreasing the initial concentration of methyl orange. Three organic byproducts of methyl orange formed during photodegradation process was identified by LC-MS/MS system then degradation pathway of methyl orange photodegradation in the presence of C-N-codoped TiO2 catalyst was proposed.

DOI

10.21608/ejchem.2019.14543.1883

Keywords

Methyl orange, Photodegradation, C-N-codoped TiO2, degradation-pathway

Authors

First Name

Reza

Last Name

Putri

MiddleName

Audina

Affiliation

Laboratory of Applied Analytical-Chemistry, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, Padang 25163, Indonesia

Email

rezaaudina002@gmail.com

City

Padang

Orcid

-

First Name

Safni

Last Name

Safni

MiddleName

-

Affiliation

Laboratory of Applied Analytical-Chemistry, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, Padang 25163, Indonesia

Email

safni@yahoo.com

City

-

Orcid

-

First Name

Novesar

Last Name

Jamarun

MiddleName

-

Affiliation

Laboratory of Material, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, Padang 25163, Indonesia

Email

novesar62@yahoo.com

City

-

Orcid

-

First Name

Upita

Last Name

Septiani

MiddleName

-

Affiliation

Laboratory of Material, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Andalas University, Padang 25163, Indonesia

Email

upitas@yahoo.com

City

-

Orcid

-

First Name

Moon-Kyung

Last Name

Kim

MiddleName

-

Affiliation

Institute of Health and Environment, Seoul National University, Seoul 08826, Korea

Email

sharom21@snu.ac.kr

City

-

Orcid

-

First Name

Kyung-duk

Last Name

Zoh

MiddleName

-

Affiliation

Institute of Health and Environment, Seoul National University, Seoul 08826, Korea

Email

zohkd@snu.ac.id

City

-

Orcid

-

Volume

62

Article Issue

Special Issue (Part 2) Innovation in Chemistry

Related Issue

10565

Issue Date

2019-12-01

Receive Date

2019-07-09

Publish Date

2019-12-01

Page Start

563

Page End

575

Print ISSN

0449-2285

Online ISSN

2357-0245

Article File

EJCHEM_Volume 62_Issue Special Issue (Part 2) Innovation in Chemistry_Pages 563-575.pdf

PDF . 1.8MB

Link

https://ejchem.journals.ekb.eg/article_53220.html

Detail API

https://ejchem.journals.ekb.eg/service?article_code=53220

Order

11

Type

Original Article

Type Code

297

Publication Type

Journal

Publication Title

Egyptian Journal of Chemistry

Publication Link

https://ejchem.journals.ekb.eg/

MainTitle

Kinetics studies on photodegradation of methyl orange in the presence of C-N-codoped TiO2 catalyst

Details

Type

Article

Created At

22 Jan 2023