Synergetic effect of copper species as cocatalyst on LaFeO3 for enhanced visible-light photocatalytic hydrogen evolution

Abstract. Orthorhombic structure of rare earth perovskite-type oxide LaFeO 3 nanoparticles with light absorption properties in the visible range was prepared by co-precipitation method. The prepared nanoparticles was characterized by several measurements such as X-ray diffraction, energy dispersive X-ray, field emission scanning electron microscope, diffuse reflectance spectroscopy, vibrating sample magnetometer and electron spin resonance spectroscopy. Methylene blue was taken as the model pollutant to evaluate its photocatalytic, sonocatalytic, photosonocatalytic degradation in the presence of LaFeO 3 nanoparticles. The degradation of methylene blue followed the pseudo-first order model in all three processes. The observed rate constants indicate that the photosonocatalytic was faster than the respective individual. Radical scavenger experiments revealed that holes were the predominant oxidative species involved in all three processes.

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“…The result is tabulated in Table. 2. This value is closed to the value reported in the literature [26][27][28].…”

Section: Resultscontrasting

confidence: 68%

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO₃Nanoparticles

Afifah

Saleh

2016

J. Phys.: Conf. Ser.

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“…They can be prepared by a variety of wet or solid-state procedures and from different precursors [199], including anatase as the titanium source [200]. [211].…”

Section: Simple Oxides Other Than Tio2 Among Oxides Of Metals In D 0mentioning

confidence: 99%

Photocatalytic production of hydrogen from biomass-derived feedstocks

Puga

2016

Coordination Chemistry Reviews

362

270

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The application of photocatalysis for the utilisation of sunlight energy is intensely investigated in present times, particularly in prospect of generating solar fuels by hydrogen production or CO2 reduction processes as tools for societies aiming to relief their thirst for fossil resources. From the perspective of sustainability, the rational use of biomass-derived feedstocks for photocatalytic H2 production is a feasible, proven and highly efficient process. In this review, in addition to delving into physico-chemical fundamentals of photocatalytic processes on semiconductors, the research activity on this topic related to design of revolutionary semiconductor-based materials, generally including metallic nanoparticles or complexes as hydrogen-evolving co-catalysts, is outlined and critically evaluated. Moreover, the use of sunlight and renewable feedstocks for the generation of hydrogen, as a compelling opportunity for the energy sector, is emphasised. Special focus is also set on the valorisation of biorefinery products, agricultural residues and industrial or municipal waste.

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“…Cost effective solar fuel generation is hindered by the semiconductor material not meeting certain essential criteria to achieve highly efficient solar to hydrogen conversion. These criteria are as follows: (i) the visible part of the solar spectrum must be absorbed for higher efficiency of hydrogen production and the band edges should ideally straddle the redox potential of water splitting, (ii) the photoexcited carriers must separate and migrate to the surface without recombination, (iii) adsorbed species must be reduced and oxidized by the photogenerated electrons and holes to produce H 2 and O 2 3 , 14 . Also for cost effective, environmental and scalability issues, earth abundant non-toxic materials should be the focus of research into new semiconductor materials.…”

Section: Introductionmentioning

confidence: 99%

Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode

Pawar

Tahir

2018

Sci Rep

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Photoelectrochemical (PEC) water splitting to produce solar fuel (hydrogen) has long been considered as the Holy Grail to a carbon-free hydrogen economy. The PEC concept to produce solar fuel is to emulate the natural photosynthesis using man made materials. The bottle-neck in realising the concept practically has been the difficulty in identifying stable low-cost semiconductors that meet the thermodynamic and kinetic criteria for photoelectrolysis. We have fabricated a novel p-type LaFeO3 photoelectrode using an inexpensive and scalable spray pyrolysis method. Our nanostructured LaFeO3 photoelectrode results in spontaneous hydrogen evolution from water without any external bias applied. Moreover, the photoelectrode has a faradaic efficiency of 30% and showed excellent stability over 21 hours. From optical and impedance data, the constructed band diagram showed that LaFeO3 can straddle the water redox potential with the conduction band at −1.11 V above the reduction potential of hydrogen. We have fabricated a low cost LaFeO3 photoelectrode that can spontaneously produce hydrogen from water using sunlight, making it a strong future candidate for renewable hydrogen generation.

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Synergetic effect of copper species as cocatalyst on LaFeO3 for enhanced visible-light photocatalytic hydrogen evolution

Cited by 39 publications

References 35 publications

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO₃Nanoparticles

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO₃Nanoparticles

Photocatalytic production of hydrogen from biomass-derived feedstocks

Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode

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Synergetic effect of copper species as cocatalyst on LaFeO3 for enhanced visible-light photocatalytic hydrogen evolution

Cited by 39 publications

References 35 publications

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO3Nanoparticles

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO3Nanoparticles

Photocatalytic production of hydrogen from biomass-derived feedstocks

Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode

Contact Info

Product

Resources

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Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO₃Nanoparticles

Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO₃Nanoparticles