Sains Malaysiana 54(7)(2025): 1823-1834

http://doi.org/10.17576/jsm-2025-5407-15

 

Peningkatan Prestasi Fotomangkin dalam Degradasi Aseton menggunakan Filem Nipis Nanorod x-TiNb

(Enhanced Photocatalytic Performance in Acetone Degradation using x-TiNb Nanorods Thin Films)

 

MASLIANA MUSLIMIN^1,* & MOHAMMAD HAFIZUDDIN HJ JUMALI²

 

¹Bahagian Teknologi Industri, Agensi Nuklear Malaysia, Bangi, 43000 Kajang, Selangor, Malaysia

²Jabatan Fizik Gunaan, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

 

Diserahkan: 21 Mac 2025/Diterima: 19 Mei 2025

 

Abstrak

Penyelidikan terhadap degradasi aseton menggunakan fotomangkin TiO₂ nanorod (TiO₂NR) terdop Nb telah dijalankan dalam kajian ini. Filem nipis  TiO₂NR terdop Nb (x-TiNb)  dengan kepekatan berbeza; 0.2 v/v%, 0.5 v/v%, 0.7 v/v%  dan 1.0 v/v%  dihasilkan menggunakan kaedah hidroterma pada suhu 170 °C selama 30 min. Analisisi FESEM menunjukkan peningkatan kepekatan Nb membawa kepada pembesaran diameter nanorod. Ini akhirnya mengakibatkan kemusnahan struktur nanorod bagi sampel pada kepekatan 1.0 v/v%. Analisis PL menunjukkan bahawa sampel x-TiNb menunjukkan keamatan puncak yang lebih rendah berbanding dengan TiO₂NR, kecuali pada kepekatan 1.0 v/v%. Dapat dilihat peratus degradasi optimum bagi larutan aseton sebanyak 60% berlaku bagi sampel pada kepekatan 0.5 v/v% dalam tempoh masa 240 min. Analisis XPS menunjukkan kehadiran dua puncak utama Nb 3d_5/2 dan Nb 3d_3/2 masing-masing pada sekitar 207 eV dan 209.5 eV, yang mengesahkan kewujudan Nb⁵⁺ dalam struktur TiO₂. Justeru, dapat dinyatakan bahawa pendopan Nb telah membantu meningkatkan prestasi TiO₂-NR sebagai fotomangkin dalam proses degradasi aseton.  

Kata kunci: Aseton; fotomangkin; Nb₂O₅; TiO₂NR

 

Abstract

Research on acetone degradation using Nb-doped TiO₂ nanorods (TiO₂NR) photocatalyst was carried out in this study. Nb doped TiO₂NR (x-TiNb) thin films with different concentrations; 0.2 v/v%, 0.5 v/v%, 0.7 v/v%, and 1.0 v/v% were produced using the hydrothermal method at a temperature of 170 °C for 30 min. FESEM analysis shows that increasing the concentration of Nb leads to an increase in the diameter of the nanorods. This ultimately resulted in the destruction of the nanorods structure in the sample with a concentration of 1.0 v/v%. Except for a concentration of 1.0 v/v%, PL analysis shows that the x-TiNb sample exhibits a lower peak intensity compared to TiO₂NR. It can be seen that the optimal percentage of acetone solution degradation is 60% occurs for the sample with a concentration of 0.5 v/v% in 240 min duration time. There was an increment in binding energy of Ti 2p for this sample by XPS analysis, confirming the incorporation of Nb into the TiO₂ crystal plane. Thus, it can be stated that Nb doping has improved the performance of TiO₂NR as a photocatalyst in the acetone degradation process.

Keywords: Acetone; Nb₂O₅; photocatalyst; TiO₂NR

 

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*Pengarang untuk surat-menyurat; email: masliana@nm.gov.my