College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu, Anhui 233030, PR China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350116, PR China.
College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu, Anhui 233030, PR China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350116, PR China.
J Hazard Mater. 2020 Nov 15;399:122999. doi: 10.1016/j.jhazmat.2020.122999. Epub 2020 May 29.
Environmental photocatlytsis has been considered as a promising alternative strategy to address the current environmental threats and pressures. Fabrication of the photocatalysts with high efficiency, stability and bio-safety is the core of photocatalytic applications. Herein, we report a facile approach to synthesize monazite BiPO (SHTW) with high crystallization and hydroxylation. The wide bandgap of the SHTW can provide strong redox abilities to produce reactive species and mineralize organic pollutants. Its high crystallinity and dipole moment can promote separation and transportation of the photoexcited electron-hole pairs effectively. In addition, the hydroxylation can produce more highly oxidizing hydroxyl radicals and further improve charge carrier separation. Notably, the hydroxylation can be reborn and the high crystallization can be maintained during photocatalysis. Thus, a virtuous cycle can be established and organic pollutants can be removed efficiently. The mineralization rate of 146.1 μmol g h can be obtained on the SHTW for photocatalytic degradation of benzene, which is about 8.5 times higher than that of the commercial TiO (P25). Various dyes, dyes mixture and bisphenol A can all be completely degraded over the SHTW. It shows the potential application and value in environmental governance.
环境光催化被认为是应对当前环境威胁和压力的一种很有前途的替代策略。制备高效、稳定和生物安全的光催化剂是光催化应用的核心。在此，我们报告了一种简便的方法来合成具有高结晶度和羟基化的独居石 BiPO（SHTW）。SHTW 的宽带隙能提供强大的氧化还原能力，以产生活性物质并矿化有机污染物。其高结晶度和偶极矩可以有效地促进光生电子-空穴对的分离和传输。此外，羟基化可以产生更多的强氧化性羟基自由基，并进一步提高电荷载流子的分离。值得注意的是，在光催化过程中，羟基化可以重生，高结晶度可以保持。因此，可以建立一个良性循环，有效地去除有机污染物。在光催化降解苯的过程中，SHTW 的矿化速率可达 146.1 μmol·g-1·h-1，是商业 TiO（P25）的 8.5 倍。各种染料、染料混合物和双酚 A 都可以在 SHTW 上完全降解。它显示了在环境治理方面的潜在应用和价值。
