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UV-Based Advanced Oxidation Processes of Remazol Brilliant Blue R Dye Catalyzed by Carbon Dots
| Content Provider | MDPI |
|---|---|
| Author | Cardoso, Inês M. F. Cardoso, Rita M. F. Silva, Luís Pinto da Silva, Joaquim C. G. Esteves da |
| Copyright Year | 2022 |
| Description | UV-based advanced oxidation processes (AOPs) $(UV/H_{2}O_{2}$ and UV/S_{2}O_{8}$^{2−}$) 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 °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 $TiO_{2}$ 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 $(UV/H_{2}O_{2}$, UV/S_{2}O_{8}$^{2−}$, and $UV/TiO_{2}$), 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 $H_{2}O_{2}$/TIP-CD-0.0330 $min^{−1}$ and UV/1.02 mM S_{2}O_{8}$^{2−}$/TIP-CD-0.0345 $min^{−1}$. |
| Starting Page | 2116 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12122116 |
| Journal | Nanomaterials |
| Issue Number | 12 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-20 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Water Science and Technology Textile Dyes Remazol Brilliant Blue R Reactive Blue 19 Uv Based Aop Carbon Dots |
| Content Type | Text |
| Resource Type | Article |
