Journal
APPLIED SURFACE SCIENCE
Volume 440, Issue -, Pages 170-176Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.01.127
Keywords
g-C3N4; Ultrathin layer; Attapulgite; Visible-light-responsive photocatalyst; Interact
Categories
Funding
- National Natural Science Foundation of China [51472101]
- Big Six-Talent Project of Jiangsu Province [JY-031]
- Undergraduate Innovation Program of Jiangsu Province
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A novel visible-light-responsive photocatalyst is fabricated by introducing g-C3N4 ultrathin films onto the surface of attapulgite (ATP) via a simple in-situ depositing technique, in which ATP was pre-grafted using (3-Glycidyloxypropyl) trimethoxysilane (KH560) as the surfactant. A combination of XRD, FT-IR, BET, XPS, UV-vis, TEM and SEM techniques are utilized to characterize the composition, morphology and optical properties of the products. The results show that with the help of KH560, g-C3N4 presented as ultrathin layer is uniformly loaded onto the surface of ATP by forming a new chemical bond (Si-O-C). Comparing with g-C3N4 and ATP, ATP/g-C3N4 exhibits remarkably enhanced visible-light photocatalytic activity in degradation of methyl orange (MO) because of its high surface area, appropriate band gap and the synergistic effect between g-C3N4 and ATP. To achieve the best photocatalyst, the ratio of g-C3N4 was adjusted by controlling the mass portion between ATP-KH560 and melamine (r = m (ATP-KH560)/m (melamine)). The highest decomposition rate of methyl orange (MO) was 96.06% when r = 0.5 and this degradation efficiency remained unchanged after 4 cycles, which is 10 times as that of pure g-C3N4 particles. Possible photocatalytic mechanism is presented. (C) 2018 Elsevier B.V. All rights reserved.
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