Malaysian Journal of Analytical Sciences Vol 19 No 6 (2015): 1250 - 1255

 

 

 

ANNEALING EFFECT ON THE PHOTOELECTROCHEMICAL PROPERTIES OF BiVO₄ THIN FILM ELECTRODES

 

(Kesan Sepuh Lindap terhadap Sifat Fotoelektrokimia Elektrod Filem Nipis BiVO₄)

 

Siti Nur Farhana Mohd Nasir¹*, Mohd Asri Mat Teridi¹, Mehdi Ebadi¹, Jagdeep Singh Sagu²,

Mohamad Yusof Sulaiman¹, Norasikin Ahmad Ludin¹, Mohd Adib Ibrahim¹

 

¹Solar Energy Research Institute,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

²Department of Chemistry,

Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom

 

*Corresponding author: farhanaana98@gmail.com

 

 

Received: 4 February 2015; Accepted: 29 September 2015

 

 

Abstract

Monoclinic bismuth vanadate (BiVO₄) thin film electrodes were fabricated on fluorine-doped tin oxide via aerosol-assisted chemical vapour deposition (AACVD). Annealing and without annealing effect of thin films were analysed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet–visible  spectrophotometry (UV-Vis) and current-voltage measurement. All BiVO₄ thin films showed an anodic photocurrent. The sample of BiVO₄ annealed at 400 °C exhibited the highest photocurrent density of 0.44 mA cm^-2 vs. Ag/AgCl at 1.23 V.

 

Keywords: BiVO₄ thin film, AACVD, PEC water splitting, annealing

 

Abstrak

Elektrod filem nipis monoklinik bismut vanadat, BiVO₄ telah dienapkan pada substrat fluorin terdop-timah oksida melalui kaedah pemendapan bantuan-aerosol wap kimia  (AACVD).  Kesan sepuh lindap terhadap filem nipis dianalisis menggunakan pembelauan sinar-X (XRD), analisis mikroskop elektron imbasan pancaran medan (FESEM), spektrofotometer ultralembayung-nampak (UV-Vis) dan pengukuran arus-voltan. Semua sampel yang dihasilkan menunjukkan arusfoto anodik. Sampel BiVO₄ yang melalui sepuh lindap pada suhu 400 °C menunjukkan ketumpatan arusfoto tertinggi iaitu 0.44 mA cm^-2 vs. Ag/AgCl pada 1.23 V.

 

Kata kunci: filem nipis BiVO₄, AACVD, PEC pembelahan air, sepuh lindap

 

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