A heterojunction strategy to improve the visible light sensitive water splitting performance of photocatalytic materials

Afroz, Khurshida; Moniruddin,; Bakranov, Nurlan; Kudaibergenov, Sarkyt E.; Nuraje, Nurxat

doi:10.1039/c8ta04165b

Cited by 266 publications

(133 citation statements)

References 145 publications

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“…The semiconductor that coupled with the host-semiconductor would typically act as a sensitizer. In such cases, it is the sensitizers that get excited and transfer/inject the carriers into the host-semiconductor and, therefore, the VB of the sensitizer should be more cathodic than the VB of TiO 2 , so that the holes cannot migrate to the TiO 2 ; thereby, the charge separation remains in the system [108]. These kinetics facilitate the phenomenon of electron injections into TiO 2 as demonstrated in Figure 5c,d [109].…”

Section: Hetero-junction Tiomentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Sakar

Prakash

2019

Catalysts

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Photocatalysis is a multifunctional phenomenon that can be employed for energy applications such as H2 production, CO2 reduction into fuels, and environmental applications such as pollutant degradations, antibacterial disinfection, etc. In this direction, it is not an exaggerated fact that TiO2 is blooming in the field of photocatalysis, which is largely explored for various photocatalytic applications. The deeper understanding of TiO2 photocatalysis has led to the design of new photocatalytic materials with multiple functionalities. Accordingly, this paper exclusively reviews the recent developments in the modification of TiO2 photocatalyst towards the understanding of its photocatalytic mechanisms. These modifications generally involve the physical and chemical changes in TiO2 such as anisotropic structuring and integration with other metal oxides, plasmonic materials, carbon-based materials, etc. Such modifications essentially lead to the changes in the energy structure of TiO2 that largely boosts up the photocatalytic process via enhancing the band structure alignments, visible light absorption, carrier separation, and transportation in the system. For instance, the ability to align the band structure in TiO2 makes it suitable for multiple photocatalytic processes such as degradation of various pollutants, H2 production, CO2 conversion, etc. For these reasons, TiO2 can be realized as a prototypical photocatalyst, which paves ways to develop new photocatalytic materials in the field. In this context, this review paper sheds light into the emerging trends in TiO2 in terms of its modifications towards multifunctional photocatalytic applications.

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Section: Hetero-junction Tiomentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Sakar

Prakash

2019

Catalysts

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“…[2][3][4] In the 21 st century, when we are facing an energy crisis and environmental pollution as one of the major global problems, the idea developed by Fujishima and Honda is more popular than ever since solar-driven photoelectrochemical (PEC) water splitting of semiconductor catalysis can be used for efficient conversion of solar energy to chemical energy or electricity. [5][6][7] An efficient photoactive material should meet both kinetic and thermodynamic criteria for the photoconversion of solar energy to chemical energy or electricity. 7 In order to be suited for this purpose, photoactive materials need to: (1) absorb both ultraviolet and visible light irradiation producing electron-hole pairs, (2) separate electrons and holes in space to prevent their recombination, (3) provide rapid charge transfer across the electrode/electrolyte interface, (4) have suitable redox potentials to drive photo-oxidative reactions, (5) have a high photo-corrosion resistivity, and (6) to be recyclable, either for the sake of reuse or to prevent further water contamination.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties

et al. 2019

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“…The result shows two tail to tail diodes. The cubic phase of LNO acted as an n-type semiconductor to release electrons, while the nano-crystallinity of the BNMO layer defects acted as a hole-absorbing electron [23][24][25].The Schottky emission mechanism is determined by the linear relationship of Ln(I) versus V 1/2 [26,27]. If the relationship is linear, this is due to the thermionic emission by holes, vacancies and defects [28][29][30][31][32], respectively.…”

Section: Resultsmentioning

confidence: 99%

Ferroelectric Diode Effect with Temperature Stability of Double Perovskite Bi2NiMnO6 Thin Films

et al. 2019

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Double perovskite Bi2NiMnO6 (BNMO) thin films grown on p-Si (100) substrates with LaNiO3 (LNO) buffer layers were fabricated using chemical solution deposition. The crystal structure, surface topography, surface chemical state, ferroelectric, and current-voltage characteristics of BNMO thin films were investigated. The results show that the nanocrystalline BNMO thin films on p-Si substrates without and with LNO buffer layer are monoclinic phase, which have antiferroelectric-like properties. The composition and chemical state of BNMO thin films were characterized by X-ray photoelectron spectroscopy. In the whole electrical property testing process, when the BNMO/p-Si heterojunction changed into a BNMO/LNO/p-Si heterojunction, the diode behavior of a single diode changing into two tail to tail diodes was observed. The conduction mechanism and temperature stability were also discussed.

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A heterojunction strategy to improve the visible light sensitive water splitting performance of photocatalytic materials

Abstract: This article summarizes the photocatalytic water splitting performance improvement with a heterojunction system.

Cited by 266 publications

References 145 publications

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties

Ferroelectric Diode Effect with Temperature Stability of Double Perovskite Bi2NiMnO6 Thin Films

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