Photocatalytic Hydrogen Production: Role of Sacrificial Reagents on the Activity of Oxide, Carbon, and Sulfide Catalysts

被引:312
作者
Kumaravel, Vignesh [1 ,2 ]
Imam, Muhammad Danyal [3 ]
Badreldin, Ahmed [3 ]
Chava, Rama Krishna [4 ]
Do, Jeong Yeon [4 ]
Kang, Misook [4 ]
Abdel-Wahab, Ahmed [3 ]
机构
[1] Inst Technol Sligo, Sch Sci, Dept Environm Sci, Ash Lane, Sligo F91 YW50, Ireland
[2] Inst Technol Sligo, Ctr Precis Engn Mat & Mfg Res PEM, Ash Lane, Sligo F91 YW50, Ireland
[3] Texas A&M Univ Qatar, Chem Engn Program, Doha 23874, Qatar
[4] Yeungnam Univ, Coll Nat Sci, Dept Chem, Gyongsan 38541, Gyeongbuk, South Korea
关键词
photocatalysis; TiO2; g-C3N4; CdS; energy; NITROGEN-DOPED GRAPHENE; ONE-STEP SYNTHESIS; ASSISTED HYDROTHERMAL SYNTHESES; LIGHT-DRIVEN PHOTOCATALYST; WATER-SPLITTING ACTIVITY; H-2 PRODUCTION ACTIVITY; MIXED-PHASE TIO2; VISIBLE-LIGHT; NOBLE-METAL; G-C3N4; NANOSHEETS;
D O I
10.3390/catal9030276
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Photocatalytic water splitting is a sustainable technology for the production of clean fuel in terms of hydrogen (H-2). In the present study, hydrogen (H-2) production efficiency of three promising photocatalysts (titania (TiO2-P25), graphitic carbon nitride (g-C3N4), and cadmium sulfide (CdS)) was evaluated in detail using various sacrificial agents. The effect of most commonly used sacrificial agents in the recent years, such as methanol, ethanol, isopropanol, ethylene glycol, glycerol, lactic acid, glucose, sodium sulfide, sodium sulfite, sodium sulfide/sodium sulfite mixture, and triethanolamine, were evaluated on TiO2-P25, g-C3N4, and CdS. H-2 production experiments were carried out under simulated solar light irradiation in an immersion type photo-reactor. All the experiments were performed without any noble metal co-catalyst. Moreover, photolysis experiments were executed to study the H-2 generation in the absence of a catalyst. The results were discussed specifically in terms of chemical reactions, pH of the reaction medium, hydroxyl groups, alpha hydrogen, and carbon chain length of sacrificial agents. The results revealed that glucose and glycerol are the most suitable sacrificial agents for an oxide photocatalyst. Triethanolamine is the ideal sacrificial agent for carbon and sulfide photocatalyst. A remarkable amount of H-2 was produced from the photolysis of sodium sulfide and sodium sulfide/sodium sulfite mixture without any photocatalyst. The findings of this study would be highly beneficial for the selection of sacrificial agents for a particular photocatalyst.
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页数:35
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