Fe3O4 Nanorods Coated with ZIF-8 and Decorated with Pt Nanoparticles as Magnetically Actuated Nanoscale Stirring Bars for Catalytic Dye Degradation, H2 Production, and Hydrogenation of Olefins

2021 ◽  
Author(s):  
Ying Yu ◽  
Yicheng Zhong ◽  
Deng Xie ◽  
Guangzhen Luo ◽  
Yuelin Mao ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Pt Nanoparticles ◽  
H2 Production ◽  
Magnetically Actuated

Optimization of N doping in TiO2 nanotubes for the enhanced solar light mediated photocatalytic H2 production and dye degradation

2021 ◽  
Vol 269 ◽  
pp. 116170
Author(s):  
Yadala Venkata Divyasri ◽  
Nagappagari Lakshmana Reddy ◽  
Kiyoung Lee ◽  
M. Sakar ◽  
Vempuluru Navakoteswara Rao ◽  
...  
Keyword(s):  
Tio2 Nanotubes ◽  
Dye Degradation ◽  
H2 Production ◽  
Solar Light ◽  
N Doping

scholarly journals A promising carbon fiber-based photocatalyst with hierarchical structure for dye degradation

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22234-22242 ◽  
Author(s):  
Chen Gu ◽  
Sen Xiong ◽  
Zhaoxiang Zhong ◽  
Yong Wang ◽  
Weihong Xing
Keyword(s):  
Carbon Fiber ◽  
Atomic Layer Deposition ◽  
Magnetron Sputtering ◽  
Carbon Fibers ◽  
Dye Degradation ◽  
Zno Nanorods ◽  
Pt Nanoparticles ◽  
Atomic Layer ◽  
Dc Magnetron Sputtering ◽  
Layer Deposition

To fabricate a novel photocatalyst, ZnO seeds were uniformly deposited on carbon fibers via atomic layer deposition followed by hydrothermal growth of ZnO nanorods, then Pt nanoparticles were deposited by DC magnetron sputtering.

Identifying the active photocatalytic H2-production sites on TiO2-supported Pt nanoparticles by the in-situ infrared spectrum of CO

2020 ◽  
Vol 63 (3) ◽  
pp. 354-360 ◽  
Author(s):  
Peng Zhou ◽  
Hongna Zhang ◽  
Hongwei Ji ◽  
Wanhong Ma ◽  
Chuncheng Chen ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Pt Nanoparticles ◽  
H2 Production

Template-Free Synthesis of Nanostructured CdxZn1–xS with Tunable Band Structure for H2 Production and Organic Dye Degradation Using Solar Light

2013 ◽  
Vol 47 (12) ◽  
pp. 6664-6672 ◽  
Author(s):  
Sunil N. Garaje ◽  
Sanjay K. Apte ◽  
Sonali D. Naik ◽  
Jalindar D. Ambekar ◽  
Ravindra S. Sonawane ◽  
...  
Keyword(s):  
Band Structure ◽  
Dye Degradation ◽  
H2 Production ◽  
Organic Dye ◽  
Solar Light ◽  
Organic Dye Degradation ◽  
Template Free

scholarly journals Photocatalytic Removal of Methyl Orange Azo Dye with Simultaneous Hydrogen Production Using Ru-modified ZnO Photocatalyst

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 964 ◽  
Author(s):  
Vaiano ◽  
Iervolino
Keyword(s):  
Methyl Orange ◽  
Hydrogen Production ◽  
Azo Dye ◽  
Dye Degradation ◽  
Irradiation Time ◽  
H2 Production ◽  
Precipitation Method ◽  
Photocatalytic Process ◽  
Wavelength Emission ◽  
Mineralization Degree

The aim of this work is to demonstrate the effectiveness of the photocatalytic process in the Methyl Orange azo dye degradation and simultaneous H2 production by using ZnO doped with ruthenium. Ru-modified ZnO photocatalysts were prepared by precipitation method and were characterized by different techniques (XRF, Raman, XRD, N2 adsorption at −196 °C, and UV–vis DRS). The experiments were carried out in a pyrex cylindrical reactor equipped with a nitrogen distributor device and irradiated by four UV lamps with the main wavelength emission at 365 nm. Different Ru amounts (from 0.10 to 0.50 mol%) were tested in order to establish the optimal amount of the metal to be used for the ZnO doping. The photocatalytic activity was evaluated both in terms of Methyl Orange removal and hydrogen production. The experimental results showed that the best activity, both in terms of H2 production and Methyl Orange degradation, was obtained with the Ru-modified ZnO photocatalyst at 0.25 mol% Ru loading. In particular, after four hours of UV irradiation time, the discoloration and mineralization degree were equal to 83% and 78%, with a simultaneous hydrogen production of 1216 µmol L−1. This result demonstrates the ability of the photocatalytic process to valorize a dye present in wastewater, managing to obtain a hydrogen production comparable with the data present in the literature today in the presence of other sacrificial substances.

scholarly journals Charge-Transfer Regulated Visible Light Driven Photocatalytic H2 Production and CO2 Reduction in Tetrathiafulvalene Based Coordination Polymer Gel

2020 ◽  
Author(s):  
Parul Verma ◽  
Pallavi Sarkar ◽  
Ashish Singh ◽  
Swapan Pati ◽  
Tapas Maji
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Coordination Polymer ◽  
Visible Light ◽  
Co2 Reduction ◽  
Pt Nanoparticles ◽  
H2 Production ◽  
Polymer Gel ◽  
H2 Evolution

Abstract The much-needed renewable alternatives to fossil fuel can be achieved efficiently and sustainably by converting solar energy to solar fuels via hydrogen generation from water or CO2 reduction. In this regard, a soft processable metal-organic hybrid semiconducting material has been developed and studied for photocatalytic activity towards H2 production and CO2 reduction to CO and CH4 under visible light and direct sunlight irradiation. A tetrapodal low molecular weight gelator is synthesized by integrating tetrathiafulvalene and terpyridine through amide linkage (TPY-TTF). The TPY-TTF acts as a linker and by self-assembly with ZnII results in a charge-transfer (CT) coordination polymer gel (CPG); Zn-TPY-TTF. The Zn-TPY-TTF shows impressive photocatalytic activity towards H2 production (rate = 530 μmol g-1h-1) and CO2 reduction to CO (rate = 438 μmol g-1h-1, selectivity >99%) regulated by charge-transfer interaction. Furthermore, in-situ stabilization of Pt nanoparticles to CPG (Pt@Zn-TPY-TTF) exhibits remarkably enhanced H2 evolution (rate =14727 μmol g-1h-1). Importantly, Pt@Zn-TPY-TTF modulate the CO2 reduction from CO to CH4 (rate = 292 μmol g-1h-1, selectivity >97%). Real-time CO2 reduction reaction is monitored by in-situ DRIFT study and subsequent plausible mechanism is derived computationally. The photocatalytic activity of Zn-TPY-TTF and Pt@Zn-TPY-TTF composite was also examined under sunlight that display excellent H2 evolution and CO2 reduction.

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