In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties

n this work, we successfully constructed g-C3N4/TNTs heterostructures via in situ growth of g-C3N4on thesurface of TiO2nanotube arrays (TNTs). Varying concentrations of urea precursor were adopted to prepare thebinary composites for the photodegradation of methylene blue (MB). Advanced microscopic a...

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Main Authors:	Lan, Ching Sim, Kai, Sheng Koh, Kah, Hon Leong, Yik, Heng Chin, Azrina, Abd Aziz, Saravanan, Pichiah
Format:	Article
Language:	English
Published:	Elsevier Ltd 2020
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/7/In%20situ%20growth%20of%20g-C3N4%20on%20TiO21.pdf

id	ump-27663
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spelling	ump-276632020-02-13T02:39:16Z http://umpir.ump.edu.my/id/eprint/27663/ In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties Lan, Ching Sim Kai, Sheng Koh Kah, Hon Leong Yik, Heng Chin Azrina, Abd Aziz Saravanan, Pichiah TP Chemical technology n this work, we successfully constructed g-C3N4/TNTs heterostructures via in situ growth of g-C3N4on thesurface of TiO2nanotube arrays (TNTs). Varying concentrations of urea precursor were adopted to prepare thebinary composites for the photodegradation of methylene blue (MB). Advanced microscopic and spectroscopicapproaches such as FESEM, PL-Raman, UV–vis DRS, XRD and etc examined the topography, structural andoptical properties attributed to the presence of g-C3N4in the heterostructures. The morphological analysisshowed that the in-situ growth of g-C3N4onto the surface of TNTs significantly increased the wall thickness ofthe nanotubes. The least band energy of 1.8 eV was obtained by g-C3N4/TNTs (1.5 g) due to the formation of animpurity energy level induced by the presence of g-C3N4. The electron transfer between the heterojunction of g-C3N4and TNTs was revealed by the quenching of PL emission intensity. When the urea content was optimized at1.0 g, the build-in electricfield at the interface of g-C3N4/TNTs stimulated the electrons transfer and prolongedlifetime of carriers, thus enhancing the degradation efficiency by 1.25 times higher than that of pure TNTs.However, the aggregation of g-C3N4as a result of increasing urea content (1.5–2.0 g) reduced the interfacialadhesion at the heterojunction between the g-C3N4and TNTs, thus dominating its excellent optical and chargeseparation properties and diminishing the degradation efficiency of MB. Elsevier Ltd 2020 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/27663/7/In%20situ%20growth%20of%20g-C3N4%20on%20TiO21.pdf Lan, Ching Sim and Kai, Sheng Koh and Kah, Hon Leong and Yik, Heng Chin and Azrina, Abd Aziz and Saravanan, Pichiah (2020) In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties. Journal of Environmental Chemical Engineering, 8 (1). pp. 1-7. ISSN 2213-3437 https://doi.org/10.1016/j.jece.2019.103611 https://doi.org/10.1016/j.jece.2019.103611
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 Lan, Ching Sim Kai, Sheng Koh Kah, Hon Leong Yik, Heng Chin Azrina, Abd Aziz Saravanan, Pichiah In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
description	n this work, we successfully constructed g-C3N4/TNTs heterostructures via in situ growth of g-C3N4on thesurface of TiO2nanotube arrays (TNTs). Varying concentrations of urea precursor were adopted to prepare thebinary composites for the photodegradation of methylene blue (MB). Advanced microscopic and spectroscopicapproaches such as FESEM, PL-Raman, UV–vis DRS, XRD and etc examined the topography, structural andoptical properties attributed to the presence of g-C3N4in the heterostructures. The morphological analysisshowed that the in-situ growth of g-C3N4onto the surface of TNTs significantly increased the wall thickness ofthe nanotubes. The least band energy of 1.8 eV was obtained by g-C3N4/TNTs (1.5 g) due to the formation of animpurity energy level induced by the presence of g-C3N4. The electron transfer between the heterojunction of g-C3N4and TNTs was revealed by the quenching of PL emission intensity. When the urea content was optimized at1.0 g, the build-in electricfield at the interface of g-C3N4/TNTs stimulated the electrons transfer and prolongedlifetime of carriers, thus enhancing the degradation efficiency by 1.25 times higher than that of pure TNTs.However, the aggregation of g-C3N4as a result of increasing urea content (1.5–2.0 g) reduced the interfacialadhesion at the heterojunction between the g-C3N4and TNTs, thus dominating its excellent optical and chargeseparation properties and diminishing the degradation efficiency of MB.
format	Article
author	Lan, Ching Sim Kai, Sheng Koh Kah, Hon Leong Yik, Heng Chin Azrina, Abd Aziz Saravanan, Pichiah
author_facet	Lan, Ching Sim Kai, Sheng Koh Kah, Hon Leong Yik, Heng Chin Azrina, Abd Aziz Saravanan, Pichiah
author_sort	Lan, Ching Sim
title	In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
title_short	In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
title_full	In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
title_fullStr	In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
title_full_unstemmed	In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
title_sort	in situ growth of g-c3n4 on tio2 nanotube arrays: construction of heterostructures for improved photocatalysis properties
publisher	Elsevier Ltd
publishDate	2020
url	http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/ http://umpir.ump.edu.my/id/eprint/27663/7/In%20situ%20growth%20of%20g-C3N4%20on%20TiO21.pdf
first_indexed	2023-09-18T22:43:29Z
last_indexed	2023-09-18T22:43:29Z
_version_	1777417070062862336

In situ growth of g-C3N4 on TiO2 nanotube arrays: construction of heterostructures for improved photocatalysis properties

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