Enhanced visible light photodegradation of water pollutants over N-, S-doped titanium dioxide and n-titanium dioxide in the presence of inorganic anions

Joint Authors

al-Amudi, Muhammad S.
al-Asiri, Abd Allah M.
Bazaid, Salih A.
Adam, Abd al-Majid A.
al-Amiri, Khalid A.
Anandan, Sambandam

Source

Journal of Saudi Chemical Society

Issue

Vol. 18, Issue 2 (30 Apr. 2014), pp.155-163, 9 p.

Publisher

Saudi Chemical Society

Publication Date

2014-04-30

Country of Publication

Saudi Arabia

No. of Pages

9

Main Subjects

Chemistry

Topics

Abstract EN

The potential application of waste water treatment by photocatalysis is very likely to find its place in the near future.

We have studied the photocatalytic degradation of three dyes (Eosin B, Rhodamine 6G, Rhodamine B) in the presence of doped n-TiO2 in water and found that anchoring groups are favorable to the photodegradation of the pollutants.

Taking Rhodamine B as a model pollutant, this study points out an alternative route to enhance photodegradation in invisible light, which consumes energy to synthesize, but addition of 0.1 mM of I or S2O3 2 increases the discoloration by up to three folds.

For example, KI increased degradation to 36 % while Na2S2O3 enhanced it by 61 %, which was higher than that of pure n-TiO2 after sun light irradiation of 40 min.

The enhancement of degradation by I and S2O3 2 may be linked to the scavenging ofthe holes by the inorganic anions, thus inhibiting recombination between h+ / e after excitation of the semiconductor.

The degradation is more effective in the presence of S2O3 2 .

In the presence of 0.1 mM KI, the rate constant increased from 0.0231 s 1 to 0.0325 s 1.Peroxodisulphate increases degradation, however, this is attributed to the sulfate radicals.

American Psychological Association (APA)

al-Asiri, Abd Allah M.& al-Amudi, Muhammad S.& Bazaid, Salih A.& Adam, Abd al-Majid A.& al-Amiri, Khalid A.& Anandan, Sambandam. 2014. Enhanced visible light photodegradation of water pollutants over N-, S-doped titanium dioxide and n-titanium dioxide in the presence of inorganic anions. Journal of Saudi Chemical Society،Vol. 18, no. 2, pp.155-163.
https://search.emarefa.net/detail/BIM-363448

Modern Language Association (MLA)

al-Asiri, Abd Allah M.…[et al.]. Enhanced visible light photodegradation of water pollutants over N-, S-doped titanium dioxide and n-titanium dioxide in the presence of inorganic anions. Journal of Saudi Chemical Society Vol. 18, no. 2 (Apr. 2014), pp.155-163.
https://search.emarefa.net/detail/BIM-363448

American Medical Association (AMA)

al-Asiri, Abd Allah M.& al-Amudi, Muhammad S.& Bazaid, Salih A.& Adam, Abd al-Majid A.& al-Amiri, Khalid A.& Anandan, Sambandam. Enhanced visible light photodegradation of water pollutants over N-, S-doped titanium dioxide and n-titanium dioxide in the presence of inorganic anions. Journal of Saudi Chemical Society. 2014. Vol. 18, no. 2, pp.155-163.
https://search.emarefa.net/detail/BIM-363448

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references : p. 162-163

Record ID

BIM-363448