Hydrogen production from formic acid solution by modified TiO2 and titanate nanotubes in a two-step system under visible light irradiation

2014 ◽  
Vol 69 (8) ◽  
pp. 1676-1681 ◽  
Author(s):  
H. M. Yeh ◽  
S. L. Lo ◽  
M. J. Chen ◽  
H. Y. Chen
Keyword(s):  
Hydrogen Production ◽  
Formic Acid ◽  
Visible Light ◽  
Renewable Energy Sources ◽  
Hydrogen Gas ◽  
Titanate Nanotubes ◽  
Formic Acid Solution ◽  
One Step ◽  
The One ◽  
Platinum Loading

Hydrogen gas is one of the most promising renewable energy sources, and the final product of hydrogen combustion is nothing but water. However, it is still a big challenge to produce hydrogen and store it. Many studies have been conducted into produce hydrogen from water using photocatalysts. Z-scheme photocatalysis is a two-photocatalyst system that comprises a hydrogen catalyst and an oxygen catalyst to produce hydrogen and oxygen respectively. Compared to the one-step system, the two-step system can promote the efficiency of water splitting. In addition, formic acid (FA) is a convenient hydrogen-storage material and can be safely handled in aqueous solutions. Therefore, this study investigated the photocatalytic conversion of FA solution to hydrogen using visible light with several types of hydrogen catalysts (CdS/titanate nanotubes (TNTs), CdS/TiO2, Pt/CdS/TNTs) and WO3 as the oxygen catalyst. The results showed that the yield of hydrogen with CdS/TNTs + WO3 was much higher than with CdS/TiO2 + WO3. Moreover, coating the photocatalysts with metal could further promote the reaction. The optimal platinum loading was 0.01 wt%, and the hydrogen production achieved was 852.5 μmol · h−1 with 20 vol% FA solution.

Carbon nitride supported AgPd alloy nanocatalysts for dehydrogenation of formic acid under visible light

2017 ◽  
Vol 5 (14) ◽  
pp. 6382-6387 ◽  
Author(s):  
Liping Xiao ◽  
Young-Si Jun ◽  
Binghui Wu ◽  
Deyu Liu ◽  
Tracy T Chuong ◽  
...  
Keyword(s):  
Formic Acid ◽  
Visible Light ◽  
Carbon Nitride ◽  
Room Temperature ◽  
Ambient Condition ◽  
Alloy Nanoparticles ◽  
Highly Active ◽  
One Step ◽  
The One ◽  
Temperature Preparation

We report a facile approach for the one-step room-temperature preparation of nearly monodisperse AgPd alloy nanoparticles supported on semiconductor graphitic carbon nitride (g-CN). The AgPd/g-CN nanocatalysts are highly active and durable for dehydrogenation of formic acid under visible light or dark at ambient condition.

scholarly journals MoS2/Zn3In2S6 composite photocatalysts for enhancement of visible light-driven hydrogen production from formic acid

2021 ◽  
Vol 42 (1) ◽  
pp. 193-204 ◽  
Author(s):  
Sujuan Zhang ◽  
Shixiang Duan ◽  
Gaoli Chen ◽  
Sugang Meng ◽  
Xiuzhen Zheng ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Formic Acid ◽  
Visible Light ◽  
Composite Photocatalysts ◽  
Visible Light Driven

scholarly journals One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2820
Author(s):  
Jianle Xu ◽  
Qiang Wen ◽  
Xiao Zhang ◽  
Yinhui Li ◽  
Zeyue Cui ◽  
...  
Keyword(s):  
Visible Light ◽  
High Efficiency ◽  
Separation Efficiency ◽  
Dye Degradation ◽  
Step Method ◽  
Visible Light Photocatalyst ◽  
Defect Sites ◽  
Multi Walled Carbon Nanotubes ◽  
One Step ◽  
The One

The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe2O3 (CNTs/α-Fe2O3) heterostructure composite is successfully prepared via the one-step method. Due to the synergistic effect in the as-prepared CNTs/α-Fe2O3, the defect sites and oxygen-containing functional groups of CNTs can dramatically improve the interface charge separation efficiency and prevent the aggregation of α-Fe2O3. The improved photocurrent and enhanced hole–electron separation rate in the CNTs/α-Fe2O3 is obtained, and the narrower band gap is measured to be 2.8 ev with intensive visible-light absorption performance. Thus, the CNTs/α-Fe2O3 composite serves as an excellent visible light photocatalyst and exhibits an outstanding photocatalytic activity for the cationic dye degradation of rhodamine B (RhB). This research supplies a fresh application area forα-Fe2O3 photocatalyst and initiates a new approach for design of high efficiency photocatalytic materials.

Sign in / Sign up

Export Citation Format

Share Document