Photocatalytic performance improvement by utilizing GO_MWCNTs hybrid solution on sand/ZnO/TiO2-based photocatalysts to degrade methylene blue dye

Idris, Nur Jannah; Bakar, Suriani Abu; Mohamed, Azmi; Muqoyyanah, Muqoyyanah; Othman, Mohd Hafiz Dzarfan; Mamat, Mohamad Hafiz; Ahmad, Mohd Khairul; Birowosuto, Muhammad Danang; Soga, Tetsuo

doi:10.1007/s11356-020-10904-y

Cited by 15 publications

(1 citation statement)

References 109 publications

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“…Moreover, the doped metal ions can promote the electron-hole recombination and suppress the photocatalytic reactivity. Carbon-based materials such as graphite or CNT have been employed as matrix for metal oxide as well as for light absorption-assistant materials (Sharma et al, 2021;Idris et al, 2021;Ibrahim et al, 2020;Isari et al, 2020;Stan et al, 2019;Jung et al, 2018). The carbon materials can absorb light of lower energy and play the role of an electron reservoir in the system, leading to the increased e ciency of photocatalytic reaction.…”

Section: Introductionmentioning

confidence: 99%

Synergetic Effect of Carbon Dot at Cellulose Nanofiber for Sustainable Metal-free Photocatalyst

Ahn

Pak

Kim

2021

Preprint

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Metal-free photocatalyst was synthesized by attaching carbon dot (CD) to cellulose nanofiber (CNF) via simple in-situ synthesis. The graphitic core and functional groups of CD on CNF was controlled along the precursor concentration, while the fibrous structure of CNF was intact. The optical property of the samples was profoundly analyzed focusing on the electron recombination pathway. It reveals that the excited electrons in the CD transferred to the CNF and delayed the radiative recombination. The electron-hole pairs were efficiently separated in the composite where abundant amide group and sulfide bonding existed. The CD on the CNF surface improved the morphological stability of CNF under UV irradiation as well. As a result, the composite showed superior photocatalytic performance to degrade 98% of MB molecules within 25 min. The aerogel synthesized from CDCNF had good re-usability without sacrificing its photocatalytic effect. The synthesized CDCNF composite showed superior possibility for applying cellulose nanofiber to sustainable metal-free photocatalyst.

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