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Kinetics and Mechanism of Aniline and Chloroanilines Degradation Photocatalyzed by $Halloysite-TiO_{2}$ and $Halloysite-Fe_{2}O_{3}$ Nanocomposites
| Content Provider | MDPI |
|---|---|
| Author | Piotr, Słomkiewicz Dariusz, Wideł Szczepanik, Beata Czaplicka, Marianna Frydel, Laura |
| Copyright Year | 2021 |
| Description | The kinetics of photocatalytic degradation of aniline, 2-chloroaniline, and 2,6-dichloroaniline in the presence of $halloysite-TiO_{2}$ and $halloysite-Fe_{2}O_{3}$ nanocomposites, halloysite containing naturally dispersed $TiO_{2,}$ $Fe_{2}O_{3}$, commercial $TiO_{2}$, P25, and $α-Fe_{2}O_{3}$ photocatalysts, were investigated with two approaches: the Langmuir–Hinshelwood and first-order equations. Adsorption equilibrium constants and adsorption enthalpies, photodegradation rate constants, and activation energies for photocatalytic degradation were calculated for all studied amines photodegradation. The photodegradation mechanism was proposed according to organic intermediates identified by mass spectrometry and electrophoresis methods. Based on experimental results, it can be concluded that after 300 min of irradiation, aniline, 2-chloro-, and 2,6-dichloroaniline were completely degraded in the presence of used photocatalysts. Research results allowed us to conclude that higher adsorption capacity and immobilization of $TiO_{2}$ and $Fe_{2}O_{3}$ on the halloysite surface in the case of $halloysite-TiO_{2}$ and $halloysite-Fe_{2}O_{3}$ nanocomposites significantly increases photocatalytic activity of these materials in comparison to the commercial photocatalyst: $TiO_{2}$, $Fe_{2}O_{3}$, and P25. |
| Starting Page | 1548 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal11121548 |
| Journal | Catalysts |
| Issue Number | 12 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-19 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Photodegradation Tio2-, Fe2o3-halloysite Nanocomposites Aniline Chloroanilines Kinetics |
| Content Type | Text |
| Resource Type | Article |
