Low-Temperature Synthesis of Anatase TiO[subscript 2] Nanoparticles with Tunable Surface Charges for Enhancing Photocatalytic Activity
Name
Li-2014-Low-Temperature Synt.pdf
Size
1.21 MB
Format
Adobe PDF
Checksum (MD5)
2a6c032bf3e5328b47edbfdb25001efd
Author(s)
Li, Ye
Qin, Zhenping
Guo, Hongxia
Yang, Hanxiao
Zhang, Guojun
Ji, Shulan
Zeng, Tingying
Alternative Title
Low-Temperature Synthesis of Anatase TiO2 Nanoparticles with Tunable Surface Charges for Enhancing Photocatalytic Activity
Date Issued
December 2014
Journal
PLoS ONE
Publisher
Public Library of Science
Citation
Li, Ye, Zhenping Qin, Hongxia Guo, Hanxiao Yang, Guojun Zhang, Shulan Ji, and Tingying Zeng. “Low-Temperature Synthesis of Anatase TiO[subscript 2] Nanoparticles with Tunable Surface Charges for Enhancing Photocatalytic Activity.” Edited by Vipul Bansal. PLoS ONE 9, no. 12 (December 15, 2014): e114638.
Version
Final published version
Abstract
In this work, the positively or negatively charged anatase TiO[subscript 2] nanoparticles were synthesized via a low temperature precipitation-peptization process (LTPPP) in the presence of poly(ethyleneimine) (PEI) and poly(sodium4- styrenesulfonate) (PSS). X-ray diffraction (XRD) pattern and high-resolution transmission electron microscope (HRTEM) confirmed the anatase crystalline phase. The charges of the prepared TiO[subscript 2], PEI-TiO[subscript 2] and PSS-TiO[subscript 2] nanoparticles were investigated by zeta potentials. The results showed that the zeta potentials of PEI-TiO[subscript 2] nanoparticles can be tuned from +39.47 mV to +95.46 mV, and that of PSS-TiO[subscript 2] nanoparticles can be adjusted from −56.63 mV to −119.32 mV. In comparison with TiO[subscript 2], PSS-TiO[subscript 2] exhibited dramatic adsorption and degradation of dye molecules, while the PEI modified TiO[subscript 2] nanoparticles showed lower photocatalytic activity. The photocatalytic performances of these charged nanoparticles were elucidated by the results of UV-vis diffuse reflectance spectra (DRS) and the photoluminescence (PL) spectra, which indicated that the PSS-TiO[subscript 2] nanoparticles showed a lower recombination rate of electron-hole pairs than TiO[subscript 2] and PEI-TiO[subscript 2].
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1371/journal.pone.0114638
