BiVO<sub>4</sub> optimized to nano-worm morphology for enhanced activity towards photoelectrochemical water splitting

Dey, Kajal Kumar; Gahlawat, Soniya; Ingole, Pravin P.

doi:10.1039/c9ta07353a

Cited by 66 publications

(38 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following this idea, Dey et al proposed the growth mechanism of definite BiVO 4 nano worm-like (BVNW) morphology. [51] The HRTEM analysis of the BVNW nanostructures forming a loop-like orientation with an interplanar distance of 0.29 nm confirmed the (004) lattice fringes of BiVO 4 . Initial stage low PEC was attributed to the production of defect centers during BVNW growth that functions as a trap for charge carriers.…”

Section: Morphology Engineeringmentioning

confidence: 62%

“…Morphology engineering is therefore considered as one of the effective approaches to maximize the light absorption and improve the charge carrier dynamics in BiVO 4 . To date, morphological engineering of the BiVO 4 such as nanoflakes, [50] nanoworm, [51] epitaxial growth, [24b] nanoporous, [52] twin structure, [45] etc. have been well demonstrated.…”

Section: Different Surface Bulk and Interface Engineering Strategiesmentioning

confidence: 99%

See 1 more Smart Citation

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Gaikwad

Suryawanshi

Ghorpade

et al. 2021

Small

104

View full text Add to dashboard Cite

Therefore, an ever-growing demand for sustainable and environmentally-friendly energy technologies are prompting scientists to explore alternative approaches to reduce the carbon footprint. [2] Among the different sustainable energy sources, solar energy is an inexhaustible source of energy (173000 Terawatt (TW), almost 10 000 times of 17.7 TW, global energy consumption in 2020) and the largest currently available on earth with a ubiquitous distribution worldwide. [3] However, its decentralized and intermittent nature poses a great challenge to our energy needs. [4] Artificial photosynthesis, imitating a natural photosynthesis, where the harvesting of sunlight directly into chemical bonds (hydrogen, (H 2 ) fuel) is a highly promising approach to address the serious issue like air pollution, greenhouse gas emission, etc. Artificial photosynthesis by means of photoelectrochemical (PEC) water splitting has been studied extensively to split water using sunlight and semiconductor into oxygen (O 2 ) and H 2 , where the generated H 2 can be stored and transported to other energy conversion systems. [5] In recent years, PEC water splitting turned out to be an elegant and ecological way to generate clean H 2 fuel. Despite having mature and commercialized technologies, photovoltaic-electrochemical (PV-EC) water splitting systems have the most significant complications in PV designs. [6] In a photocatalytic (PC) water splitting system, on the other hand, both H 2 and O 2 are generated on the same surface of the PC particles, and hence in most cases, backward complex reactions like hydrogen oxidation reaction and oxygen reduction reaction occur quickly, lowering the solar to H 2 (STH) conversion efficiency. [7] In comparison to the PC system, the physical separation of oxidation and reduction species in PEC cells makes them more practical, effective, and safer. Moreover, the PEC cells have an electrode/electrolyte interface that performs simultaneous roles of light-harvesting and electrolysis in a single reactor. Consequently, the large-scale application of PEC cells is the most achievable, even at lower operating temperature as it opens up the opportunity to improve efficiency and reduce costs through the nature of its device structure. In particular, a recent assessment of its practicability has shown that the lifespan (i.e., stability), efficiency, and capital cost of The photoelectrochemical (PEC) cell that collects and stores abundant sunlight to hydrogen fuel promises a clean and renewable pathway for future energy needs and challenges. Monoclinic bismuth vanadate (BiVO 4 ), having an earthabundancy, nontoxicity, suitable optical absorption, and an ideal n-type band position, has been in the limelight for decades. BiVO 4 is a potential photoanode candidate due to its favorable outstanding features like moderate bandgap, visible light activity, better chemical stability, and cost-effective synthesis methods. However, BiVO 4 suffers from rapid recombination of photogenerated charge carriers that have impeded further imp...

show abstract

Section: Morphology Engineeringmentioning

confidence: 62%

Section: Different Surface Bulk and Interface Engineering Strategiesmentioning

confidence: 99%

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Gaikwad

Suryawanshi

Ghorpade

et al. 2021

Small

104

View full text Add to dashboard Cite

show abstract

“…The capacitance and resistance can be validated and studied using M–S analysis for the interfacial properties across the junction. M–S plots were processed utilizing the following equations: 25 , 55 where ε o is the dielectric constant of the semiconductor, ε o is the permittivity of free space, A is the area of the thin film, e is the charge, and k is Boltzmann’s constant. V FB indicates the potential required to diffuse the photogenerated charge carriers in the semiconductor.…”

Section: Resultsmentioning

confidence: 99%

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

et al. 2021

View full text Add to dashboard Cite

Ternary Cu 2 SnS 3 (CTS) is an attractive nontoxic and earth-abundant absorber material with suitable optoelectronic properties for cost-effective photoelectrochemical applications. Herein, we report the synthesis of high-quality CTS nanoparticles (NPs) using a low-cost facile hot injection route, which is a very simple and nontoxic synthesis method. The structural, morphological, optoelectronic, and photoelectrochemical (PEC) properties and heterojunction band alignment of the as-synthesized CTS NPs have been systematically characterized using various state-of-the-art experimental techniques and atomistic first-principles density functional theory (DFT) calculations. The phase-pure CTS NPs confirmed by X-ray diffraction (XRD) and Raman spectroscopy analyses have an optical band gap of 1.1 eV and exhibit a random distribution of uniform spherical particles with size of approximately 15–25 nm as determined from high-resolution transmission electron microscopy (HR-TEM) images. The CTS photocathode exhibits excellent photoelectrochemical properties with PCE of 0.55% (fill factor (FF) = 0.26 and open circuit voltage (Voc) = 0.54 V) and photocurrent density of −3.95 mA/cm 2 under AM 1.5 illumination (100 mW/cm 2 ). Additionally, the PEC activities of CdS and ZnS NPs are investigated as possible photoanodes to create a heterojunction with CTS to enhance the PEC activity. CdS is demonstrated to exhibit a higher current density than ZnS, indicating that it is a better photoanode material to form a heterojunction with CTS. Consistently, we predict a staggered type-II band alignment at the CTS/CdS interface with a small conduction band offset (CBO) of 0.08 eV compared to a straddling type-I band alignment at the CTS/ZnS interface with a CBO of 0.29 eV. The observed small CBO at the type-II band aligned CTS/CdS interface points to efficient charge carrier separation and transport across the interface, which are necessary to achieve enhanced PEC activity. The facile CTS synthesis, PEC measurements, and heterojunction band alignment results provide a promising approach for fabricating next-generation Cu-based light-absorbing materials for efficient photoelectrochemical applications.

show abstract

“…7d for all the photoelectrodes. The ABPE was calculated from the LSV plot (i.e., the J-V curves) using the equation given below: 13…”

Section: Mechanism Of Charge Transfermentioning

confidence: 99%

“…8 There are, however, some other factors that contribute to its limited application for solar water splitting, such as its low electron mobility, average charge-carrier separation efficiency, and a high kinetic barrier for the transfer of charge carriers across the aqueous interface. 9,10 Different strategies have been adopted to overcome these limitations, such as the substitution of certain ions, 11 the design of heterostructures, 12 optimization of the morphology, 13 crystal-facet control, 14 the deposition of cocatalysts, 15 etc. There have been some reports where BiVO 4 has been combined with appropriate materials to form composites, such as BiVO 4 /Fe 2 O 3 , 16 BiVO 4 /MOOH (M = Ni, Fe), 17 FTO/BiVO 4 / Ag 2 S, 18 the NiFeV/B-BiVO 4 photoanode, 19 the WO 3 /BiVO 4 coreshell heterostructure, 20 Co-Pi/BiVO 4 , 21 etc., to enhance the photoelectrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mn²⁺ incorporation on the photoelectrochemical properties of BiVO₄

Dagar¹,

Kumar

Ganguli

2022

New J. Chem.

View full text Add to dashboard Cite

show abstract

BiVO₄ optimized to nano-worm morphology for enhanced activity towards photoelectrochemical water splitting

Abstract: Unique worm-like BiVO4 nanoparticles prepared through hydrothermal treatment of scheelite tetragonal BiVO4 show enhanced performance towards photo-electrochemical water splitting.

Cited by 66 publications

References 57 publications

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Effect of Mn²⁺ incorporation on the photoelectrochemical properties of BiVO₄

Contact Info

Product

Resources

About

BiVO4 optimized to nano-worm morphology for enhanced activity towards photoelectrochemical water splitting

Abstract: Unique worm-like BiVO4 nanoparticles prepared through hydrothermal treatment of scheelite tetragonal BiVO4 show enhanced performance towards photo-electrochemical water splitting.

Cited by 66 publications

References 57 publications

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO4 for Photoelectrochemical Water Splitting

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO4 for Photoelectrochemical Water Splitting

Ternary Cu2SnS3: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Effect of Mn2+ incorporation on the photoelectrochemical properties of BiVO4

Contact Info

Product

Resources

About

BiVO₄ optimized to nano-worm morphology for enhanced activity towards photoelectrochemical water splitting

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Emerging Surface, Bulk, and Interface Engineering Strategies on BiVO₄ for Photoelectrochemical Water Splitting

Ternary Cu₂SnS₃: Synthesis, Structure, Photoelectrochemical Activity, and Heterojunction Band Offset and Alignment

Effect of Mn²⁺ incorporation on the photoelectrochemical properties of BiVO₄