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Thermo-Responsive $ZnPc-g-TiO_{2}$-g-PNIPAM Photocatalysts Sensitized with Phthalocyanines for Water Purification under Visible Light
| Content Provider | MDPI |
|---|---|
| Author | Mao, Bingxin Liu, Cong Cui, Xu Li, Yanhui Duan, Qian |
| Copyright Year | 2022 |
| Description | A novel thermo-responsive 2,9(10),16(17),23(24)-tetrakis[(3-carboxyacrylamide) phthalocyaninato] zinc $(ZnPc)-g-TiO_{2}$-g-poly(N-isopropylacrylamide) (PNIPAM) photocatalyst modified with phthalocyanines was prepared. The photocatalyst exhibited thermo-responsive properties due to the introduction of PNIPAM, which performed recovery for reuse above the lower critical solution temperature (LCST, about 26 °C). $ZnPc-g-TiO_{2}$-g-PNIPAM effectively expanded the light response range to the visible light region and inhibited the recombination of electron–hole pairs, which enhanced the performance of the photocatalyst. As expected, $ZnPc-g-TiO_{2}$-g-PNIPAM (0.3 g/L) exhibited excellent photocatalytic performance for the removal of Rhodamine B (RhB, 1.0 × $10^{−5}$ mol/L) and methylene blue (MB, 1.0 × $10^{−5}$ mol/L) under visible light, which reached 97.2% and 88.6% at 20 °C within 40 min, respectively. Furthermore, the influence of temperature upon photocatalytic performance was also investigated. When the temperature increased from 20 °C to 45 °C, the removal of RhB decreased by approximately 53.8%. The stability of the photocatalyst demonstrated that the photocatalytic activity was still above 80% for the removal of RhB after 3 cycles. Above all, this work provided an intelligent thermally responsive photocatalyst based on phthalocyanine for water purification under visible light. |
| Starting Page | 3330 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules27103330 |
| Journal | Molecules |
| Issue Number | 10 |
| Volume Number | 27 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-22 |
| Access Restriction | Open |
| Subject Keyword | Molecules Environmental Sciences Photocatalyst Thermo-responsive Titanium Dioxide Phthalocyanine N-isopropyl Acrylamide |
| Content Type | Text |
| Resource Type | Article |
