An Efficient Visible Photocatalytic System Containing Eosin Y, Multiwalled Carbon Nanotubes and CuO for H₂ Evolution from Water

Abstract

In this work, a visible photocatalytic system containing Eosin Y, multiwalled carbon nanotubes and CuO was prepared. The photocatalytic hydrogen evolution from water over this system was studied using triethanolamine (TEA) as a sacrificial reagent. The results indicated that it was an efficient photocatalyst with an average rate of H2 evolution of 373 mmol·h-1·g-1 during first three hours under visible irradiation.

Relationship between the electrochemical behavior of multiwalled carbon nanotubes (MWNTs) loaded with CuO and the photocatalytic activity of Eosin Y-MWNTs-CuO system

“…For example, the photocatalytic system containing Eosin Y, multiwalled carbon nanotubes (MWNTs) and Pt displayed high photocatalytic activity for the H 2 evolution from water under visible irradiation [15]. We also found that Eosin Y-MWNTs-CuO possessed high activity for the photocatalytic H 2 evolution from water under visible irradiation and CuO is an efficient alternative to Pt [16]. However, the electron transfer behavior between CNTs and cocatalyst (such as Pt and CuO) in these photocatalytic systems is unclear, which will hamper the design of effective photocatalyst.…”

“…MWNTs loaded with CuO were prepared using an impregnation method similar to the procedure reported previously [16]. A typical preparation of MWNTs-6 wt.% CuO was described as follows: 200 mg of MWNT-COOHs and 1.5 mL of 0.1 mol L −1 Cu(NO 3 ) 2 solution were added into 20 mL distilled water.…”

Visible Light Photocatalytic Hydrogen Evolution from Water Reduction Using Eosin y Containing Trace Vitamin B₁₂ as a Light Harvesting Unit

“…The acidification and CuO loading of MWCNTs were conducted following the procedures described in the literature [6]. The photocatalytic reaction was carried out in a homemade gas-closed quartz reactor.…”

“…Therefore, it is very important to develop an efficient Pt-free photocatalyst. For this purpose, the photocatalytic system containing Eosin Y, MWCNTs and CuO (Eosin Y-MWCNTs-CuO) was designed in our previous work and the photocatalytic activity was evaluated by hydrogen evolution under visible light irradiation [6]. It is known that the combination of two dyes may conveniently extend the absorption range of the system and generate some synergies.…”

Throwing light on platinized carbon nanostructured composites for hydrogen generation

“…In these photocatalytic systems, their role in the photocatalytic reaction has been observed to be varied ranging from being a sensitizer, a support or even a co-catalyst. [13][14][15][16][17][18][19] Recently, Akimoto et al have demonstrated the generation of hydrogen by charcoal powder by laser irradiation. 20 They concluded that the carbon powder acted as a sacricial agent in the photoreaction.…”