A Novel Photocatalyst Composite of Magnesium Aminoclay and TiO2 Immobilized into Activated Carbon Fiber (ACF) Matrix for Pollutant Removal

Author:

Nguyen Thanh Ngoc1,Tran Vinh Van2,Bui Vu Khac Hoang2,Kim Minjeong3,Park Duckshin3,Hur Jaehyun4,Kim Il Tae4,Lee Hyun Uk5,Ko Sangwon3,Lee Young-Chul2

Affiliation:

1. NTTHi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh, 70000, Vietnam

2. Department of BioNanoTechnology Gachon University, Seongnam, Gyeonggi-do 13120, Republic of Korea

3. Korea Railroad Research Institute, Transportation Environmental Research Team, Uiwang-Si, Gyeonggi-do 16105, Republic of Korea

4. Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi-do 13120, Republic of Korea

5. Advanced Nano-Surface Research Group, Korea Basic Science Institute, Daejeon 34133, Republic of Korea

Abstract

Titanium dioxide (TiO2) is a semiconductor photocatalyst widely applied in numerous fields due to possessing prominent photocatalytic properties. However, its practical applications in the form of nanoparticles or powders still have remained several limitations. Recently, novel photocatalytic porous composites have been discovered to be potential alternative approaches. In the present study, nanostructured magnesium-aminoclay-based TiO2 (MgAC–TiO2) was successfully deposited on an activated carbon fiber (ACF) matrix using the sol–gel approach followed by calcination at 350°C in an air atmosphere. The structure and photocatalytic activity of this as-prepared photocatalyst composite were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), the Brunauer-Emmett-Teller (BET), and UV-vis diffuse reflectance spectral analysis. The photocatalytic activity of MgAC–TiO2/ACF was investigated under batch conditions for the removal of methylene blue (MB) in solution under UV irradiation and dark conditions. The results revealed that MB is absorbed by MgAC–TiO2/ACF and that its photodecomposition occurs under UV irradiation. The addition of MgAC can prevent the sintering of TiO2 act as a dispersing agent to create a high specific surface area, and thus enhance photocatalytic efficiency. In addition, ACF in the MgAC–TiO2/ACF composite can additionally improve the photocatalytic activity by hindering electron-hole recombination, which is known as a synergetic effect, and thereby enhancing the photodegradation and removal efficiency of MB.

Publisher

American Scientific Publishers

Subject

Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering

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