Mn2+ Doped Cobalt Oxide and Its Composite with Carbon Nanotubes for Adsorption-Assisted Photocatalytic Applications

被引：5

作者：

Fida, Muhammad ^{[1
]}

Iqbal, Shahid ^{[2
]}

Shah, Mazloom ^{[3
]}

Fazal, Tanzeela ^{[3
]}

Ismail, Bushra ^{[1
]}

Rehman, Hafiz Ur ^{[4
]}

Al-Fawzan, Foziah F. ^{[5
]}

Elkaeed, Eslam B. ^{[6
]}

Pashameah, Rami Adel ^{[7
]}

Alzahrani, Eman ^{[8
]}

Farouk, Abd-ElAziem ^{[9
]}

机构：

[1] COMSATS Univ Islamabad CUI, Dept Chem, Abbottabad Campus, Khyber Pakhtunkhwa 22010, Pakistan

[2] Natl Univ Sci & Technol NUST, Sch Nat Sci SNS, Dept Chem, H-12, Islamabad 46000, Pakistan

[3] Abbottabad Univ Sci & Technol, Dept Chem, Abbottabad 22010, Pakistan

[4] Quaid I Azam Univ, Dept Chem, Islamabad 15320, Pakistan

[5] Princess Nourah Bint Abdulrahman Univ, Coll Sci, Dept Chem, POB 84428, Riyadh 11671, Saudi Arabia

[6] AlMaarefa Univ, Coll Pharm, Dept Pharmaceut Sci, Riyadh 13713, Saudi Arabia

[7] Umm Al Qura Univ, Fac Appl Sci, Dept Chem, Mecca 24230, Saudi Arabia

[8] Taif Univ, Coll Sci, Dept Chem, POB 11099, Taif 21944, Saudi Arabia

[9] Taif Univ, Coll Sci, Dept Biotechnol, POB 11099, Taif 21944, Saudi Arabia

来源：

SUSTAINABILITY | 2022年 / 14卷 / 24期

关键词：

cobalt oxide; carbon nanotubes; photocatalysis; nanocomposite; water treatment; CONGO-RED; DEGRADATION; DYE; REMOVAL; DIOXIDE; TIO2; PHOTODEGRADATION; NANOPARTICLES; ENHANCEMENT; HETEROJUNCTION;

D O I：

10.3390/su142416932

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, cobalt oxide (Co3O4), Mn-doped Co3O4 (MDCO), and Mn-doped Co3O4-functionalized carbon nanotube (MDCO-CNTs) were synthesized via the co-precipitation method using cobalt nitrate and manganese nitrate as a cobalt and manganese precursor, respectively. Synthesized materials were assessed using different characterization techniques like scanning electron microscopy, X-ray diffraction, and UV-visible spectroscopy. Congo red in an aqueous solution was adopted as the model dye to estimate the adsorption-assisted photocatalytic efficiency of the synthesized materials. The samples studied for adsorpsstion-assisted photocatalysis were found to be highly effective and among all the samples, the best removal performance (80%) was obtained by treating the MDCO-CNTs composite for 50 min at 50 degrees C. Mathematical modeling shows that all of the samples followed a pseudo-second-order kinetic model and data best fitted to a Langmuir isotherm, implying that the process involved in the removal of Congo red dye is chemisorption.

引用

页数：17

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