Preparation and photocatalytic activity of pendant heteroaryl groups (pyrimidine and pyridine) grafted polyterthiophene/TiO2 composites

2020 ◽  
Vol 10 (11) ◽  
pp. 1877-1891
Author(s):  
Yingcheng Liu ◽  
Abdukeyum Abdurexit ◽  
Ruxangul Jamal ◽  
Wenli Zhang ◽  
Yinqiang Yan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Structural Analysis ◽  
Uv Light ◽  
Spectral Response ◽  
Solar Irradiation ◽  
Molar Ratio ◽  
Response Range ◽  
Non Covalent Interactions ◽  
Simulated Solar Irradiation ◽  
Covalent Interactions

In this paper, new π-conjugated heterocyclic systems with pyrimidine- and pyridine-grafted polyterthiophene were combined with TiO2 to obtain composite materials (PDTPrT/TiO2 and PDTPrmT/TiO2). The photocatalytic properties of the composites were tested by using them to degrade MB using UV-light and simulated solar irradiation. The structural analysis revealed that the pyrimidine and pyridine groups in the polyterthiophenes interacted with TiO2 via non-covalent interactions. The combination of the substituted polyterthiophene and TiO2 restrained the recombination rate of photogenerated e-?h+ pairs and broadened the spectral response range of TiO2. The results indicated that PDTPrT/TiO2 and PDTPrmT/TiO2 with a TiO2-to-monomer molar ratio of 75 had the highest photodegradation rates under UV light (98.6% and 97.4%, respectively after 10 min) and simulated solar (95.4% and 92.7%, respectively after 300 min).

scholarly journals Photocatalytic Activity and Optical Properties of Blue Persistent Phosphors under UV and Solar Irradiation

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
C. R. García ◽  
L. A. Diaz-Torres ◽  
J. Oliva ◽  
M. T. Romero ◽  
P. Salas
Keyword(s):  
Photocatalytic Activity ◽  
Annealing Temperature ◽  
Uv Light ◽  
Solar Irradiation ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Water Cleaning ◽  
Different Temperatures ◽  
The Eu

Blue phosphorescent strontium aluminosilicate powders were prepared by combustion synthesis route and a postannealing treatments at different temperatures. X-ray diffraction analysis showed that phosphors are composed of two main hexagonal phases: SrAl2O4and Sr3Al32O51. The morphology of the phosphors changed from micrograins (1000°C) to a mixture of bars and hexagons (1200°C) and finally to only hexagons (1300°C) as the annealing temperature is increased. Photoluminescence spectra showed a strong blue-green phosphorescent emission centered atλem=455 nm, which is associated with4f65d1→4f6  (8S7/2)transition of the Eu2+. The sample annealed at 1200°C presents the highest luminance value (40 Cd/m2) with CIE coordinates (0.1589, 0.1972). Also, the photocatalytic degradation of methylene blue (MB) under UV light (at 365 nm) was monitored. Samples annealed at 1000°C and 1300°C presented the highest percentage of degradation (32% and 38.5%, resp.) after 360 min. In the case of photocatalytic activity under solar irradiation, the samples annealed at 1000°C, 1150°C, and 1200°C produced total degradation of MB after only 300 min. Hence, the results obtained with solar photocatalysis suggest that our powders could be useful for water cleaning in water treatment plants.

scholarly journals Properties and Photocatalytic Activity ofβ-Ga2O3Nanorods under Simulated Solar Irradiation

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Yinzhen Wang ◽  
Ning Li ◽  
Pingping Duan ◽  
Xuwei Sun ◽  
Benli Chu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Light Emission ◽  
Methyl Orange Solution ◽  
High Photocatalytic Activity ◽  
Solar Irradiation ◽  
X Ray ◽  
Transmission Electron ◽  
Blue Solution ◽  
Simulated Solar Irradiation

β-Ga2O3nanorods are prepared by hydrothermal method and characterized by X-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and photoluminescence spectra. The results reveal that high crystallinity, monoclinic phase ofβ-Ga2O3nanorods were prepared with a diameter of about 60 nm and length of 500 nm. Photoluminescence study indicates that theβ-Ga2O3nanorods exhibit a broad blue light emission at room temperature. Theβ-Ga2O3nanorods displayed high photocatalytic activity under simulated solar irradiation; after 2 h irradiation, over 95% of methylene blue solution and over 90% of methyl orange solution were decolorized. Since this process does not require additional hydrogen peroxide and uses solar light, it can be developed as an economically feasible and environmentally friendly method to treat dye effluent.

Photocatalytic Water Splitting and Photocatalytic Degradation in Aqueous GdVO4 Suspensions under Simulated Solar Irradiation

2013 ◽  
Vol 873 ◽  
pp. 571-574 ◽  
Author(s):  
Yan Bai ◽  
Ya Ming Ding ◽  
Zhi Min Li
Keyword(s):  
Photocatalytic Activity ◽  
High Temperature ◽  
Solid State ◽  
Water Splitting ◽  
Rhodamine B ◽  
Pure Water ◽  
Xrd Analysis ◽  
Solar Irradiation ◽  
Tetragonal Type ◽  
Simulated Solar Irradiation

GdVO4 was synthesized by solid state reaction at high temperature and characterized by XRD, UVvisible DRS, BET and SEM. XRD analysis of GdVO4 showed its structure was of tetragonal type. When GdVO4 was loaded with 0.3 wt% Pt, it showed the better photocatalytic activity for water splitting under simulated solar irradiation, and the amounts of the produced hydrogen in pure water were about 9.33 μmol under the irradiation of simulated solar for 6 h. Furthermore, photodegradation of Rhodamine B (Rh B ) on the samples were investigated under simulated solar irradiation.

Hydrothermal Synthesis of Nanosized TiO2 Using Basic Peptizing Agents and their Photocatalytic Activity on the Decomposition of Orange II

2007 ◽  
Vol 544-545 ◽  
pp. 71-74
Author(s):  
Jun Ho Kim ◽  
Kwon Taek Lim ◽  
Gun Dae Lee ◽  
Seong Soo Park ◽  
Seong Soo Hong
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Batch Reactor ◽  
Anatase Phase ◽  
Photocatalytic Decomposition ◽  
Molar Ratio ◽  
Orange Ii ◽  
Titanium Tetraisopropoxide ◽  
Peptizing Agent ◽  
Hydrolysis Of

TiO2 nanoparticles were prepared using the hydrolysis of titanium tetraisopropoxide (TTIP) using TENOH as a peptizing agent in the hydrothermal method. The physical properties of prepared nanosized TiO2 particles were investigated. The photocatalytic degradation of orange II has been studied using a batch reactor in the presence of UV light. The crystallite size of the anatase phase is increased from 15 to 30 nm as the molar ratio of TENOH/TTIP increases from 0.1 to 1.0. The titania particle prepared at TENOH/TTIP molar ratio=0.1 shows the highest activity on the photocatalytic decomposition of orange II and the photocatalytic activity decreases according to an increase in TENOH/TTIP molar ratio. In addition, the titania particles prepared at 160oC shows the highest activity on the photocatalytic decomposition of orange II

Effects of Nd Doping on the Photocatalytic Behavior of Cu11O2 (VO4)6

2011 ◽  
Vol 393-395 ◽  
pp. 1181-1184
Author(s):  
Min Wang ◽  
Qiong Liu ◽  
Qi Xing
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photodegradation Rate ◽  
Triclinic Phase ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

Nd-doped Cu11O2 (VO4)6 photocatalyst was synthesized by complexing Sol-gel method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy Dispersive X-Ray Spectroscopy(EDX). The photocatalytic activity of Nd-doped Cu11O2 (VO4)6 was evaluated by photocatalytic degradation of methyl orange (MO) solution under UV-light. It revealed that the Nd-doped Cu11O2 (VO4)6 prepared with the molar ratio of citric acid to metal inons be 2:1, Nd/Cu molar ratio of 2%, pH=7 and calcinated under 500°C for 4 hours was pure triclinic phase. In this conditions, the sample had highest photocatalytic activity with the photodegradation rate was about 95.73% or so in 60min under 20W ultraviolet lamp.

Sign in / Sign up

Export Citation Format

Share Document