期刊
NANOMATERIALS
卷 12, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/nano12122116
关键词
textile dyes; Remazol Brilliant Blue R; reactive blue 19; UV based AOP; nanomaterials; carbon dots
类别
资金
- Portuguese Fundacao para a Ciencia e Tecnologia (FCT) [UIDB/00081/2020]
- Associated Laboratory IMS [LA/P/0056/2020]
UV-based advanced oxidation processes (AOPs) with a titanium(IV)-doped carbon dot catalyst were developed for the decomposition of an anthraquinone textile dye. The presence of the catalyst significantly increased the reaction rate.
UV-based advanced oxidation processes (AOPs) (UV/H2O2 and UV/S2O82-) with a titanium(IV)-doped carbon dot, TiP-CD, as a catalyst were developed for the decomposition of Remazol Brilliant Blue R (Reactive Blue 19), an anthraquinone textile dye (at T = 25 degrees C and pH = 7). The Ti-CD, with marked catalytic UV properties, was successfully synthesized by the one-pot hydrothermal procedure, using L-cysteine as carbon precursor, ethylenediamine as nitrogen source, PEG (polyethylene glycol) as a capping agent, and titanium(IV) isopropoxide (precursor of TiO2 doping). Contrary to azo dyes (methyl orange, orange II sodium salt, and reactive black 5), which achieved complete degradation in a time interval less than 30 min in the developed AOP systems (UV/H2O2, UV/S2O82-, and UV/TiO2), the RBB-R showed relatively low degradation rates and low discoloration rate constants. In the presence of the catalyzer, the reaction rate significantly increased, and the pseudo-first-order rate constants for the RBB-R discoloration were UV/3.0 mM H2O2/TIP-CD-0.0330 min(-1) and UV/1.02 mM S2O82-/TIP-CD-0.0345 min(-1).
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