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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.4
- 수록면
- 50 - 56 (7page)
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Recently, electrochemically self-doped TiO₂ nanotubes (R-TiO₂ NTs) have emerged as promising anodes in the electrochemical oxidation process for wastewater treatment, owing to their high degradation capability of organic compounds. However, the degradation mechanism of organic compounds on R-TiO₂ NTs has not been well demonstrated, and therefore, industrial practices have been limited. This study aimed to elucidate the oxidation mechanism of organic compounds on R-TiO₂ NTs by investigating phenol degradation. The performance of phenol degradation on R-TiO₂ NTs was comparable to that on the boron-doped diamond (BDD) electrode that is well-known as an excellent anode for phenol degradation. In particular, phenol degradation on R-TiO₂ NTs was completely achieved at the electrode potential of 5.0 V while negligible degradation was found at the electrode potential of 2.0 V. In addition, no peaks associated with phenol oxidation in cyclic voltammograms were noticed on R-TiO₂ NTs at the potential range between 1.0–2.5 V. Considering direct oxidation is a fundamental factor for phenol degradation at low electrode potential, it contributes less to phenol degradation on R-TiO₂ NTs. Therefore, phenol degradation on R-TiO₂ NTs is mostly owing to indirect oxidation mediated by hydroxyl radicals.
목차
ABSTRACT
1. Introduction
2. Experimental Methods
3. Results and Discussion
4. Conclusions
References
참고문헌 (32)
참고문헌 신청
Roy P, Berger S, Schmuki P. TiO2 nanotubes: synthesis and applications. Angew. Chem. Int. Ed. 2011;50:2904-2939. https://doi.org/10.1002/anie.201001374
Mor GK, Shankar K, Paulose M, Varghese OK, Grimes CA. Use of highly-ordered TiO2 nanotube arrays in dye-sensitized solar cells. Nano Lett. 2006;6:215-218. https://doi.org/10.1021/nl052099j
Hou Y, Li X, Zhao Q, Quan X, Chen G. Electrochemically assisted photocatalytic degradation of 4-chlorophenol by ZnFe2O4−modified TiO2 nanotube array electrode under visible light irradiation. Environ. Sci. Technol. 2010;44:5098-5103. https://doi.org/10.1021/es100004u
Zhu H, Zhao M, Zhou J et al. Surface states as electron transfer pathway enhanced charge separation in TiO2 nanotube water splitting photoanodes. Appl. Catal. B: Environ. 2018;234:100-108. https://doi.org/10.1016/j.apcatb.2018.04.040
Kim C, Kim S, Choi J et al. Blue TiO2 nanotube array as an oxidant generating novel anode material fabricated by simple cathodic polarization. Electrochim. Acta 2014;141:113-119. https://doi.org/10.1016/j.electacta.2014.07.062
Mor GK, Shankar K, Paulose M, Varghese OK, Grimes CA. Use of highly-ordered TiO2 nanotube arrays in dye-sensitized solar cells. Nano Lett. 2006;6:215-218. https://doi.org/10.1021/nl052099j
Hou Y, Li X, Zhao Q, Quan X, Chen G. Electrochemically assisted photocatalytic degradation of 4-chlorophenol by ZnFe2O4−modified TiO2 nanotube array electrode under visible light irradiation. Environ. Sci. Technol. 2010;44:5098-5103. https://doi.org/10.1021/es100004u
Zhu H, Zhao M, Zhou J et al. Surface states as electron transfer pathway enhanced charge separation in TiO2 nanotube water splitting photoanodes. Appl. Catal. B: Environ. 2018;234:100-108. https://doi.org/10.1016/j.apcatb.2018.04.040
Kim C, Kim S, Choi J et al. Blue TiO2 nanotube array as an oxidant generating novel anode material fabricated by simple cathodic polarization. Electrochim. Acta 2014;141:113-119. https://doi.org/10.1016/j.electacta.2014.07.062
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