Next Article in Journal
Copper Nanoparticle and Nitrogen Doped Graphite Oxide Based Biosensor for the Sensitive Determination of Glucose
Previous Article in Journal
Construction of g-C3N4-mNb2O5 Composites with Enhanced Visible Light Photocatalytic Activity
Open AccessArticle

Optimization of Malachite Green Removal from Water by TiO2 Nanoparticles under UV Irradiation

by Yongmei Ma 1, Maofei Ni 1,2 and Siyue Li 1,*
1
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(6), 428; https://doi.org/10.3390/nano8060428
Received: 22 May 2018 / Revised: 7 June 2018 / Accepted: 7 June 2018 / Published: 13 June 2018
TiO2 nanoparticles with surface porosity were prepared by a simple and efficient method and presented for the removal of malachite green (MG), a representative organic pollutant, from aqueous solution. Photocatalytic degradation experiments were systematically conducted to investigate the influence of TiO2 dosage, pH value, and initial concentrations of MG. The kinetics of the reaction were monitored via UV spectroscopy and the kinetic process can be well predicted by the pseudo first-order model. The rate constants of the reaction kinetics were found to decrease as the initial MG concentration increased; increased via elevated pH value at a certain amount of TiO2 dosage. The maximum efficiency of photocatalytic degradation was obtained when the TiO2 dosage, pH value and initial concentrations of MG were 0.6 g/L, 8 and 10−5 mol/L (M), respectively. Results from this study provide a novel optimization and an efficient strategy for water pollutant treatment. View Full-Text
Keywords: TiO2; photocatalytic degradation; malachite green; kinetics process; concentration gradient TiO2; photocatalytic degradation; malachite green; kinetics process; concentration gradient
Show Figures

Figure 1

MDPI and ACS Style

Ma, Y.; Ni, M.; Li, S. Optimization of Malachite Green Removal from Water by TiO2 Nanoparticles under UV Irradiation. Nanomaterials 2018, 8, 428.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop