Photodeposited-metal/CdS/ZnO heterostructures for solar photocatalytic hydrogen production under different conditions

Kim, Yeong Gyeong; Jo, Wan-Kuen

doi:10.1016/j.ijhydene.2017.02.176

Cited by 43 publications

(11 citation statements)

References 36 publications

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“…There was not a significant increment in the efficiency of CdS/Na 2 S as compared to the photolysis of Na 2 S. However, the efficiency of CdS/Na 2 SO 3 was higher than that of Na 2 SO 3 photolysis. It is also noted that a high concentration of sulfide/sulfite mixture (in the range of 0.2 M to 1 M) was used in most of the studies for H 2 production [246,264,273,300,[448][449][450][451]. In such cases, the photolysis of sulfide or sulfite solutions were not evaluated.…”

Section: Photolysismentioning

confidence: 99%

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

et al. 2019

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Photocatalytic water splitting is a sustainable technology for the production of clean fuel in terms of hydrogen (H2). In the present study, hydrogen (H2) 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. H2 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 H2 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 H2 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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Section: Photolysismentioning

confidence: 99%

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

et al. 2019

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“…As a significant process to convert solar energy into chemical energy, photocatalytic hydrogen evolution has always been the hot spot in the research field of photocatalysis [47,121,122,123]. Table 3 lists some of the most representative M/S photocatalysts for hydrogen evolution [48,63,67,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144].…”

Section: Applications and Properties Of M/s Nanocomposite Photocatmentioning

confidence: 99%

Metal/Semiconductor Nanocomposites for Photocatalysis: Fundamentals, Structures, Applications and Properties

2019

Nanomaterials

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Due to the capability of utilizing light energy to drive chemical reactions, photocatalysis has been widely accepted as a green technology to help us address the increasingly severe environment and energy issues facing human society. To date, a large amount of research has been devoted to enhancing the properties of photocatalysts. As reported, coupling semiconductors with metals is one of the most effective methods to achieve high-performance photocatalysts. The excellent properties of metal/semiconductor (M/S) nanocomposite photocatalysts originate in two aspects: (i) improved charge separation at the metal-semiconductor interface; and (ii) increased absorption of visible light due to the surface plasmon resonance of metals. So far, many M/S nanocomposite photocatalysts with different structures have been developed for the application in environmental remediation, selective organic transformation, hydrogen evolution, and disinfection. Herein, we will give a review on the M/S nanocomposite photocatalysts, regarding their fundamentals, structures (as well as their typical synthetic approaches), applications and properties. Finally, we will also present our perspective on the future development of M/S nanocomposite photocatalysts.

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“…4,5 Utilizing solar energy to produce hydrogen has broad prospects. 6 Effectively converting solar light into chemical energy requires research and development of considerably active photocatalysts for the splitting of water. 7 The value of the band gap for graphitic C nitride (equal to 2.7 eV) is ideal for water-splitting catalysts.…”

Section: ■ Introductionmentioning

confidence: 99%

“…For decades, scientists have focused on renewable and clean energy to release environmental pollution and overcome the coming global energy crisis. − Hydrogen is an ideal energy source because of the reproducible, effective, and environmentally friendly properties. , Utilizing solar energy to produce hydrogen has broad prospects . Effectively converting solar light into chemical energy requires research and development of considerably active photocatalysts for the splitting of water .…”

Section: Introductionmentioning

confidence: 99%

Conjugated Cationic Pp-x Formed on g-C₃N₄ for Photocatalyzed Water Splitting

Tang

Jiang

et al. 2021

Langmuir

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Polycationic Pp-x@g-C3N4 composite was synthesized through an in situ polymerization process of N-alkylpyridinium acetylenic alcohol bromide (p-x) above the surface of g-C3N4. The structure of p-0 and the Pp-x@g-C3N4 properties were checked by modern technologies. Photocatalytic tests of Pp-x@g-C3N4 in water splitting unveiled much better Pp-x@g-C3N4 hydrogen evolution activities by comparison with both g-C3N4 and Pp-0. The hydrogen production by Pp-0@g-C3N4 was 1654.5 μmol h–1 g–1, which is ∼26- and 22-fold greater in relation to what g-C3N4 and Pp-0 produced (62.7 and 75.0 μmol h–1 g–1, respectively), suggesting strong bilateral and synergistic interactions of g-C3N4 with Pp-0. Although the lengthening methylene chain in the polymers weakened the hydrogen generation ability of Pp-x@g-C3N4, the conjugated double bonds, solubilization, and dispersion of Pp-x polycationic surfactants made Pp-x@g-C3N4 superior to g-C3N4 in water splitting. Due to the readily available raw materials, a simple way of preparation (starting chemicals to p-0 to Pp-0@g-C3N4), high photocatalysis efficiency, light irritation stability, recyclable ability, and low toxicity, Pp-0@g-C3N4 is a good candidate for water splitting.

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Photodeposited-metal/CdS/ZnO heterostructures for solar photocatalytic hydrogen production under different conditions

Cited by 43 publications

References 36 publications

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

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

Metal/Semiconductor Nanocomposites for Photocatalysis: Fundamentals, Structures, Applications and Properties

Conjugated Cationic Pp-x Formed on g-C₃N₄ for Photocatalyzed Water Splitting

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Photodeposited-metal/CdS/ZnO heterostructures for solar photocatalytic hydrogen production under different conditions

Cited by 43 publications

References 36 publications

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

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

Metal/Semiconductor Nanocomposites for Photocatalysis: Fundamentals, Structures, Applications and Properties

Conjugated Cationic Pp-x Formed on g-C3N4 for Photocatalyzed Water Splitting

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Conjugated Cationic Pp-x Formed on g-C₃N₄ for Photocatalyzed Water Splitting