An investigation on the effect of electrodeposited nanostructured ZnO on the electron transfer process efficiency of TiO2 based DSSC

“…DSSC has attracted attention due to low production cost, simple structure and possibility for high conversion efficiency. [3], [4] Under the illumination of solar light, sensitizer dye absorbs visible light, then dye molecules are excited then electrons are produced. The electrons pass thought anode electrode, external circuit and CE.…”

Section: Introductionmentioning

confidence: 99%

The Impact of PDDA in CNT Counter Electrode on the Conversion Efficiency of DSSC

Kurokawa¹,

Nguyen²,

Taguchi³

2018

IJCEA

View full text Add to dashboard Cite

Dye-Sensitized Solar Cell (DSSC) is one of the equipment to convert sunlight into electricity. DSSC consists of anode electrode, titanium oxide () thin film, sensitizer dye, electrolyte and cathode electrode (CE). In general, platinum (Pt) is usually used for CE. This paper studied the fabrication of CE using carbon nanotube (CNT) and CNT mixed with Poly (diallyl dimethylammonium chloride) (PDDA) (CNT/PDDA) as the substitution for Pt electrode. For the fabrication process, Electrophoresis Deposition (EPD) method was employed. CNT electrode was dried at room temperature at 25 o C or annealed at 400 o C for 1 hour, and CNT/PDDA CE was dried at room temperature at 25 o C. The thickness of CE we fabricated was around 15. We adapted MK2 dye which was an organic dye for DSSC. Experimental results showed that the conversion efficiency of the DSSC in the case of CNT/PDDA CE (4.12%) was higher than that of the case of dried CNT electrode (2.78%) and annealed CNT electrode (3.49%) under the 1 sun illumination (100 ⁄). From this experiment results, PDDA has improved CE ability. In addition, CNT/PDDA CE do not need annealing process, so enabling flexible DSSC.

show abstract

“…ZnO has a lower electron affinity to organic chromophores as compared with TiO 2 . The nanoparticles of ZnO are regarded as highly efficient charge traps, providing enough distributed surface traps, thereby reducing the charge recombination with minimal hindrance to organics-TiO 2 electron injection (Mozaffari et al 2015). The XRD patterns in Fig.…”

Section: Findings Catalyst Characterizationmentioning

confidence: 99%

Investigating the synergy of integrated anaerobic digestion and photodegradation using hybrid photocatalyst for molasses wastewater treatment

Mabuza

Otieno

Apollo

et al. 2017

Euro-Mediterr J Environ Integr

View full text Add to dashboard Cite

Anaerobic digestion (AD) can remove the high organic load of molasses wastewater (MWW), but is ineffective in removing the characteristic dark brown colour caused by biorecalcitrant melanoidin. Ultraviolet (UV) photodegradation, can mineralise the biorecalcitrants leading to complete colour removal, but with a high-energy input and low organic load removal. This study investigated the plausibility of integrating the two processes for organic load and colour reductions. Desk scale AD and photodegradation processes were carried out in batch reactors. A hybrid photocatalyst consisting of titanium dioxide (TiO 2 ) and zinc oxide (ZnO) was used for photocatalytic degradation. Biodegradation at thermophilic conditions in the bioreactor achieved high total organic carbon (TOC) and chemical oxygen demand (COD) reductions of 80 and 90%, respectively, but with an increased colour intensity. Contrastingly, UV photodegradation achieved a high colour reduction of 92% with an insignificant 6% TOC reduction, after 30 min of irradiation. During photodegradation, the mineralisation of the biorecalcitrant organic compounds led to the colour disappearance. The energy required for the TOC reduction was 40-fold higher than that required for the colour reduction in the same irradiation period, suggesting that the UV process was only suitable for colour reduction. Therefore, there is a possible synergy when the two processes are integrated, with AD preceding UV, where AD removes the high COD/TOC while UV removes the recalcitrant colour at a reduced cost.

show abstract

An investigation on the effect of electrodeposited nanostructured ZnO on the electron transfer process efficiency of TiO2 based DSSC

Cited by 44 publications

References 58 publications

Disposable urea biosensor based on nanoporous ZnO film fabricated from omissible polymeric substrate

Disposable urea biosensor based on nanoporous ZnO film fabricated from omissible polymeric substrate

The Impact of PDDA in CNT Counter Electrode on the Conversion Efficiency of DSSC

Investigating the synergy of integrated anaerobic digestion and photodegradation using hybrid photocatalyst for molasses wastewater treatment

Contact Info

Product

Resources

About