التفاصيل البيبلوغرافية
| العنوان: |
Morphology-dependent activation of hydrogen peroxide with Cu2O for tetracycline hydrochloride degradation in bicarbonate aqueous solution. |
| المؤلفون: |
Liu, Xiuying1,2 (AUTHOR), Xia, Qianna1 (AUTHOR), Zhou, Jiao1 (AUTHOR), Li, Bowen1 (AUTHOR), Zhao, Shuaiqi1 (AUTHOR), Chen, Long3 (AUTHOR), Khan, Aimal1 (AUTHOR), Li, Xiaoxia1 (AUTHOR), Xu, Aihua1,2 (AUTHOR) xahspinel@sina.com |
| المصدر: |
Journal of Environmental Sciences (Elsevier). Mar2024, Vol. 137, p567-579. 13p. |
| مصطلحات موضوعية: |
HYDROGEN peroxide, AQUEOUS solutions, COPPER, HETEROGENEOUS catalysts, TETRACYCLINE, BICARBONATE ions, CARBONATES |
| مستخلص: |
• Cu 2 O with different morphologies was applied for H 2 O 2 activation. • The cubic Cu 2 O showed the highest activity for TC degradation. • The surface oxygen species play an important role for H 2 O 2 adsorption. • Hydroxyl radicals, carbonate radicals and Cu(III) were the main active species. • Possible TC degradation mechanism was proposed. The design of efficient heterogeneous catalysts in bicarbonate-activated hydrogen peroxide systems (BAP) is a hot topic in wastewater treatment. In this work, Cu 2 O nanoparticles with different morphologies including cubic shape (c-Cu 2 O), octahedron shape (o-Cu 2 O) and spherical shape (s-Cu 2 O), were applied in BAP for the first time to degrade tetracycline hydrochloride (TC). Compared with Cu2+ ions and CuO, TC degradation was boosted in the presence of Cu 2 O in the BAP system, with the degradation rate following the order c-Cu 2 O > o-Cu 2 O > s-Cu 2 O. The morphology-dependent effects could be linearly correlated with the ratio of surface oxygen species (O S), but not with the surface area or Cu(I) ratio. The c-Cu 2 O catalyst with exposure of (100) facets contained 76.6% O S as the active site for H 2 O 2 adsorption and activation, while the value was much lower for o-Cu 2 O and s-Cu 2 O with dominant (111) facets. The presence of HCO 3 − enhanced the interactions among Cu 2 O, H 2 O 2 and TC, leading to facile oxidation of Cu(I) to Cu(II) by H 2 O 2 , and the formation of various reactive species such as hydroxyl radicals and Cu(III) contributed to TC degradation. This work provides a new method for enhancing H 2 O 2 activation with heterogeneous catalysts by crystal facet engineering. [Display omitted] [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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