Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties
In the present work, a facile one-step hydrothermal synthesis of well-defined stabilized CuO nanopetals and its surface study by advanced nanocharacterization techniques for enhanced optical and catalytic properties has been investigated. Characterization by Transmission electron microscopy (TEM) an...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-07-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/10/7/1298 |
| _version_ | 1827713793336016896 |
|---|---|
| author | Muhammad Arif Khan Nafarizal Nayan Shadiullah Mohd Khairul Ahmad Chin Fhong Soon |
| author_facet | Muhammad Arif Khan Nafarizal Nayan Shadiullah Mohd Khairul Ahmad Chin Fhong Soon |
| author_sort | Muhammad Arif Khan |
| collection | DOAJ |
| description | In the present work, a facile one-step hydrothermal synthesis of well-defined stabilized CuO nanopetals and its surface study by advanced nanocharacterization techniques for enhanced optical and catalytic properties has been investigated. Characterization by Transmission electron microscopy (TEM) analysis confirmed existence of high crystalline CuO nanopetals with average length and diameter of 1611.96 nm and 650.50 nm, respectively. The nanopetals are monodispersed with a large surface area, controlled morphology, and demonstrate the nanocrystalline nature with a monoclinic structure. The phase purity of the as-synthesized sample was confirmed by Raman spectroscopy and X-ray diffraction (XRD) patterns. A significantly wide absorption up to 800 nm and increased band gap were observed in CuO nanopetals. The valance band (VB) and conduction band (CB) positions at CuO surface are measured to be of +0.7 and −1.03 eV, respectively, using X-ray photoelectron spectroscopy (XPS), which would be very promising for efficient catalytic properties. Furthermore, the obtained CuO nanopetals in the presence of hydrogen peroxide (<inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi mathvariant="normal">H</mi> <mn>2</mn> </msub> <msub> <mi mathvariant="normal">O</mi> <mn>2</mn> </msub> <mo stretchy="false">)</mo> </mrow> </semantics> </math> </inline-formula> achieved excellent catalytic activities for degradation of methylene blue (MB) under dark, with degradation rate > 99% after 90 min, which is significantly higher than reported in the literature. The enhanced catalytic activity was referred to the controlled morphology of monodispersed CuO nanopetals, co-operative role of <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi mathvariant="normal">H</mi> <mn>2</mn> </msub> <msub> <mi mathvariant="normal">O</mi> <mn>2</mn> </msub> </mrow> </semantics> </math> </inline-formula> and energy band structure. This work contributes to a new approach for extensive application opportunities in environmental improvement. |
| first_indexed | 2024-03-10T18:43:57Z |
| format | Article |
| id | doaj.art-d15f92a3919241f9bc3f0adc17ae3b8d |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T18:43:57Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-d15f92a3919241f9bc3f0adc17ae3b8d2023-11-20T05:39:23ZengMDPI AGNanomaterials2079-49912020-07-01107129810.3390/nano10071298Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic PropertiesMuhammad Arif Khan0Nafarizal Nayan1Shadiullah2Mohd Khairul Ahmad3Chin Fhong Soon4Microelectronics and Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Batu Pahat Johor 86400, MalaysiaMicroelectronics and Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Batu Pahat Johor 86400, MalaysiaDepartment of Physics, Faculty of Basic and Applied Sciences, International Islamic University, Sector H-10, Islamabad 44000, PakistanMicroelectronics and Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Batu Pahat Johor 86400, MalaysiaMicroelectronics and Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Batu Pahat Johor 86400, MalaysiaIn the present work, a facile one-step hydrothermal synthesis of well-defined stabilized CuO nanopetals and its surface study by advanced nanocharacterization techniques for enhanced optical and catalytic properties has been investigated. Characterization by Transmission electron microscopy (TEM) analysis confirmed existence of high crystalline CuO nanopetals with average length and diameter of 1611.96 nm and 650.50 nm, respectively. The nanopetals are monodispersed with a large surface area, controlled morphology, and demonstrate the nanocrystalline nature with a monoclinic structure. The phase purity of the as-synthesized sample was confirmed by Raman spectroscopy and X-ray diffraction (XRD) patterns. A significantly wide absorption up to 800 nm and increased band gap were observed in CuO nanopetals. The valance band (VB) and conduction band (CB) positions at CuO surface are measured to be of +0.7 and −1.03 eV, respectively, using X-ray photoelectron spectroscopy (XPS), which would be very promising for efficient catalytic properties. Furthermore, the obtained CuO nanopetals in the presence of hydrogen peroxide (<inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi mathvariant="normal">H</mi> <mn>2</mn> </msub> <msub> <mi mathvariant="normal">O</mi> <mn>2</mn> </msub> <mo stretchy="false">)</mo> </mrow> </semantics> </math> </inline-formula> achieved excellent catalytic activities for degradation of methylene blue (MB) under dark, with degradation rate > 99% after 90 min, which is significantly higher than reported in the literature. The enhanced catalytic activity was referred to the controlled morphology of monodispersed CuO nanopetals, co-operative role of <inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi mathvariant="normal">H</mi> <mn>2</mn> </msub> <msub> <mi mathvariant="normal">O</mi> <mn>2</mn> </msub> </mrow> </semantics> </math> </inline-formula> and energy band structure. This work contributes to a new approach for extensive application opportunities in environmental improvement.https://www.mdpi.com/2079-4991/10/7/1298CuO nanopetalssurface studyadvanced nanocharacterizationvalence band &conduction bandcatalytic activity |
| spellingShingle | Muhammad Arif Khan Nafarizal Nayan Shadiullah Mohd Khairul Ahmad Chin Fhong Soon Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties Nanomaterials CuO nanopetals surface study advanced nanocharacterization valence band & conduction band catalytic activity |
| title | Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties |
| title_full | Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties |
| title_fullStr | Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties |
| title_full_unstemmed | Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties |
| title_short | Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties |
| title_sort | surface study of cuo nanopetals by advanced nanocharacterization techniques with enhanced optical and catalytic properties |
| topic | CuO nanopetals surface study advanced nanocharacterization valence band & conduction band catalytic activity |
| url | https://www.mdpi.com/2079-4991/10/7/1298 |
| work_keys_str_mv | AT muhammadarifkhan surfacestudyofcuonanopetalsbyadvancednanocharacterizationtechniqueswithenhancedopticalandcatalyticproperties AT nafarizalnayan surfacestudyofcuonanopetalsbyadvancednanocharacterizationtechniqueswithenhancedopticalandcatalyticproperties AT shadiullah surfacestudyofcuonanopetalsbyadvancednanocharacterizationtechniqueswithenhancedopticalandcatalyticproperties AT mohdkhairulahmad surfacestudyofcuonanopetalsbyadvancednanocharacterizationtechniqueswithenhancedopticalandcatalyticproperties AT chinfhongsoon surfacestudyofcuonanopetalsbyadvancednanocharacterizationtechniqueswithenhancedopticalandcatalyticproperties |