Enhanced photocatalytic water splitting hydrogen production on RuO2/La:NaTaO3 prepared by sol–gel method

Torres-Martı́nez, Leticia M.; Gómez, R.; Vázquez‐Cuchillo, O.; Juárez-Ramírez, Isaías; Cruz‐López, Arquímedes; Alejandre-Sandoval, F.J.

doi:10.1016/j.catcom.2010.09.032

Cited by 67 publications

(23 citation statements)

References 28 publications

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“…n‐Type semiconductors are produced when the impurities are capable of providing extra electrons to the host atom, whilst p‐type semiconductors are capable of providing extra valence holes to the host atom. Doping semiconductors with transition metals, metalloids, lanthanides, noble metals, alkaline‐earth metals, nonmetals, and rare earth metals have been efficient strategies to increase the photoresponse toward the visible region and adjust the band structure.…”

Section: Recent Progress In the Design Of Semiconductor Photocatalystmentioning

confidence: 99%

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Opoku

Govender

Sittert

et al. 2017

Advanced Sustainable Systems

168

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Photocatalytic approaches in the visible region show promising potential in photocatalytic water splitting and water treatment to boost water purification efficiency. For this reason, developing cost‐effective and efficient photocatalysts for environmental remediation is a growing need, and semiconductor photocatalysts have now received more interest owing to their excellent activity and stability. Recently, several metal oxides, sulfides, and nitrides‐based semiconductors for water splitting and photodegradation of pollutants have been developed. However, the existing challenges, such as high over potential, wide band gap as well as fast recombination of charge carriers of most of the semiconductors limit their photocatalytic properties. This review summarizes the recent state‐of‐the‐art first‐principles research progress in the design of effective visible‐light‐response semiconductor photocatalysts through several modification processes with a focus on density functional theory (DFT) calculations. Recent developments to the exchange‐correlation effect, such as hybrid functionals, DFT + U as well as methods beyond DFT are also emphasized. Recent discoveries on the origin, fundamentals, and the underlying mechanisms of the interfacial electron transfer, band gap reduction, enhanced optical absorption, and electron–holes separation are presented. Highlights on the challenges and proposed strategies in developing advanced semiconductor photocatalysts for the application in water splitting and degradation of pollutants are proposed.

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Section: Recent Progress In the Design Of Semiconductor Photocatalystmentioning

confidence: 99%

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Opoku

Govender

Sittert

et al. 2017

Advanced Sustainable Systems

168

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“…[1][2][3][4][5] In electrocatalysis, RuO 2 can function as an active component for chlorine generation from HCl, 6 catalytic CO 2 reduction 7,8 as well as the efficient catalyst for the oxygen and hydrogen evolution reactions. [9][10][11] Furthermore, promising potentials for photocatalytic water splitting, [12][13][14][15] sodium-ion batteries, 16 aerobic oxidation of alcohols, 17 nitrous oxide (N 2 O) decomposition, 18 photocatalytic CO 2 reduction, 19 carbon-free H 2 production, 20 and room-temperature CO oxidation 21 have also been demonstrated by exploiting the intrinsic properties of RuO 2 . Recently the lithium-oxygen (Li-O 2 ) battery has attracted tremendous attention and RuO 2 plays a key role as bifunctional catalyst for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) to reduce the overpotential of discharging/ charging process.…”

Section: Introductionmentioning

confidence: 99%

“…Till now, a vast body of the literature has documented various synthetic approaches for the deposition of RuO 2 nanoparticles on functional substrates. 33 Most of them however involved complicated preparation processes, such as prolonged reaction time, 17,34 energy-consuming steps, for example, the need of postannealing treatment at an elevated temperature, 9,24,35 or the most concerned issue, i.e. the use of large amount of ruthenium precursors, 17,22,23,34 which may further obstruct the practical utilization of nanocrystalline RuO 2 .…”

Section: Introductionmentioning

confidence: 99%

Electroless deposition of RuO₂-based nanoparticles for energy conversion applications

et al. 2019

RSC Adv.

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“…One type of such composites is usually constructed by coupling semiconductors with larger band gap for the purpose of the higher redox ability, such as WO 3 /TiO 2 , RuO 2 /NaTaO 3 and NiO/ZnO. [23][24][25][26] The reduction and oxidation reactions could occur at two different potential sites, which effectively inhibit the combination of photoexcited electron-hole pairs. Nevertheless, such composites may fail to secure good visible light response.…”

Section: Introductionmentioning

confidence: 99%

Coupled Heterojunction Sn₂Ta₂O₇@SnO₂: Cooperative Promotion of Effective Electron–Hole Separation and Superior Visible-light Absorption

Lang

Wang

et al. 2015

ACS Appl. Mater. Interfaces

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In this work, a novel heterostructure integrated by two wide-band gap semiconductors, SnO2 and Sn2Ta2O7, is successfully prepared via a hydrothermal approach. Hollow Sn2Ta2O7 spheres were first formed, and small SnO2 particles were then well-dispersed onto the outside surface of the spheres, forming a p-n heterostructure. This heterostructure exhibits a higher potential edge that yielded enhanced photoredox ability. Further, the heterostructure is of Z-type with a consistent internal electric field direction, which effectively separates the photogenerated electron-hole pairs. Although both component semiconductors do not absorb visible light, the resulted p-n heterostructure is surprisingly observed to show an outstanding photocatalytic performance under visible light illumination. Such a visible light response is concluded to be the consequence of the impurity band formed by Sn(2+) doped in SnO2 and Sn(4+) in Sn2Ta2O7 via in situ redox. The existence of coupled Sn(2+) and Sn(4+) ions in p-n heterostructure is responsible for the absence of defects and the regenerated catalytic activities. The findings reported here may provide an approach to fabricate the new types of photocatalysts with a synergetic promotion for visible light absorption and sustained photocatalytic activities by coupling different wide-band semiconductors.

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Enhanced photocatalytic water splitting hydrogen production on RuO2/La:NaTaO3 prepared by sol–gel method

Cited by 67 publications

References 28 publications

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Electroless deposition of RuO₂-based nanoparticles for energy conversion applications

Coupled Heterojunction Sn₂Ta₂O₇@SnO₂: Cooperative Promotion of Effective Electron–Hole Separation and Superior Visible-light Absorption

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Enhanced photocatalytic water splitting hydrogen production on RuO2/La:NaTaO3 prepared by sol–gel method

Cited by 67 publications

References 28 publications

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Recent Progress in the Development of Semiconductor‐Based Photocatalyst Materials for Applications in Photocatalytic Water Splitting and Degradation of Pollutants

Electroless deposition of RuO2-based nanoparticles for energy conversion applications

Coupled Heterojunction Sn2Ta2O7@SnO2: Cooperative Promotion of Effective Electron–Hole Separation and Superior Visible-light Absorption

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Product

Resources

About

Electroless deposition of RuO₂-based nanoparticles for energy conversion applications

Coupled Heterojunction Sn₂Ta₂O₇@SnO₂: Cooperative Promotion of Effective Electron–Hole Separation and Superior Visible-light Absorption