A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting

Several papers have addressed the production of H2 from water using catalyst. One of the most innovative ways is via photocatalysis. In this study, titania act as the base catalyst on which copper dopant varies the physicochemical properties. Ultimately, this work was aimed to synthesized and invest...

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Main Author:	Chong, Soo Kee
Format:	Undergraduates Project Papers
Language:	English
Published:	2014
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/9019/ http://umpir.ump.edu.my/id/eprint/9019/ http://umpir.ump.edu.my/id/eprint/9019/1/CD8555%20%40%2088.pdf

id	ump-9019
recordtype	eprints
spelling	ump-90192015-10-23T01:23:32Z http://umpir.ump.edu.my/id/eprint/9019/ A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting Chong, Soo Kee TP Chemical technology Several papers have addressed the production of H2 from water using catalyst. One of the most innovative ways is via photocatalysis. In this study, titania act as the base catalyst on which copper dopant varies the physicochemical properties. Ultimately, this work was aimed to synthesized and investigated the physicochemical properties of titania supported copper, (Cu/TiO2) photocatalyst for photoreaction of glycerol solution. The photocatalyst, Cu/TiO2 was prepared via wet impregnation method with doped 2, 5, 10, 15, 20 and 25 wt% of Cu. X-ray fluorescence (XRF) showed that the composition of Cu followed the doped weight percentage on TiO2 and liquid-nitrogen physisorption showed that the BET specific surface area decreased with the increment of Cu loading. Thermogravimetric analysis (TGA) showed that Cu decomposed around 450 to 550 K while X-ray diffraction (XRD) proved the Cu/TiO2 was anatase with a new peak 2θ = 13° found as the appearance peak of CuO species. The measured densities were differed from the theoretical calculated densities. The photoreactivity of Cu/TiO2 was tested with methylene blue decomposition and the results have indicated that Cu/TiO2 possessed photoreactivity. The conversions for all the photocatalysts with Cu loading were higher than the pristine TiO2. This has confirmed that Cu loading has effectively increased the photoreaction of methylene blue solution. The 15 wt% Cu/TiO2 photocatalyst showed the highest conversion at 44%. For loadings lower than 15wt%Cu, the photocatalytic activity increased with Cu deposition on TiO2. The concentration profiles were fitted to the first order reaction rate law, the rate constant for each Cu/TiO2 was calculated and 15 wt% Cu/TiO2 has the highest rate constant (9.70 10-3 min-1). The photocatalyst loading and concentration loading were conducted. In photocatalyst loading study, 1.0 g/L of 15 wt% Cu/TiO2 can be concluded as the optimum weight loading for 300 mL of MB solution. In the concentration study, the amount of photocatalyst (0.25g) considered not optimum to yield the maximum conversion. The photocatalytic performance of Cu/TiO2 photocatalyst in various copper loadings has revealed that hydrogen generation activity was disadvantageous of high copper loading as it displayed an inferior activity 2014-01 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/9019/1/CD8555%20%40%2088.pdf Chong, Soo Kee (2014) A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting. Faculty Of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:84834&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Chong, Soo Kee A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
description	Several papers have addressed the production of H2 from water using catalyst. One of the most innovative ways is via photocatalysis. In this study, titania act as the base catalyst on which copper dopant varies the physicochemical properties. Ultimately, this work was aimed to synthesized and investigated the physicochemical properties of titania supported copper, (Cu/TiO2) photocatalyst for photoreaction of glycerol solution. The photocatalyst, Cu/TiO2 was prepared via wet impregnation method with doped 2, 5, 10, 15, 20 and 25 wt% of Cu. X-ray fluorescence (XRF) showed that the composition of Cu followed the doped weight percentage on TiO2 and liquid-nitrogen physisorption showed that the BET specific surface area decreased with the increment of Cu loading. Thermogravimetric analysis (TGA) showed that Cu decomposed around 450 to 550 K while X-ray diffraction (XRD) proved the Cu/TiO2 was anatase with a new peak 2θ = 13° found as the appearance peak of CuO species. The measured densities were differed from the theoretical calculated densities. The photoreactivity of Cu/TiO2 was tested with methylene blue decomposition and the results have indicated that Cu/TiO2 possessed photoreactivity. The conversions for all the photocatalysts with Cu loading were higher than the pristine TiO2. This has confirmed that Cu loading has effectively increased the photoreaction of methylene blue solution. The 15 wt% Cu/TiO2 photocatalyst showed the highest conversion at 44%. For loadings lower than 15wt%Cu, the photocatalytic activity increased with Cu deposition on TiO2. The concentration profiles were fitted to the first order reaction rate law, the rate constant for each Cu/TiO2 was calculated and 15 wt% Cu/TiO2 has the highest rate constant (9.70 10-3 min-1). The photocatalyst loading and concentration loading were conducted. In photocatalyst loading study, 1.0 g/L of 15 wt% Cu/TiO2 can be concluded as the optimum weight loading for 300 mL of MB solution. In the concentration study, the amount of photocatalyst (0.25g) considered not optimum to yield the maximum conversion. The photocatalytic performance of Cu/TiO2 photocatalyst in various copper loadings has revealed that hydrogen generation activity was disadvantageous of high copper loading as it displayed an inferior activity
format	Undergraduates Project Papers
author	Chong, Soo Kee
author_facet	Chong, Soo Kee
author_sort	Chong, Soo Kee
title	A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
title_short	A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
title_full	A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
title_fullStr	A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
title_full_unstemmed	A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
title_sort	study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/9019/ http://umpir.ump.edu.my/id/eprint/9019/ http://umpir.ump.edu.my/id/eprint/9019/1/CD8555%20%40%2088.pdf
first_indexed	2023-09-18T22:07:08Z
last_indexed	2023-09-18T22:07:08Z
_version_	1777414782872190976

A study into the roles of cu/tio2 photocatalysts in the of methylene blue photodecomposition and water photo-splitting

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