Abstract
Polycyclic aromatic hydrocarbons (PAHs) in tobacco tar are regarded as a significant threat to human health. PAHs are formed due to the incomplete combustion of organics in tobacco and cigarette paper. Herein, for the first time, we extended the application of CsPbBr3 quantum dots (CsPbBr3) to the photocatalytic degradation of tobacco tar, which was collected from used cigarette filters. To optimize the photoactivity, CsPbBr3 was coupled with Bi2WO6 for the construction of a type-II photocatalyst. The photocatalytic performance of the CsPbBr3/Bi2WO6 composite was evaluated by the degradation rate of PAHs from tobacco tar under simulated solar irradiation. The results revealed that CsPbBr3/Bi2WO6 possesses a large specific surface area, outstanding absorption ability, good light absorption and rapid charge separation. As a result, in addition to good stability, the composite photocatalyst performed remarkably well in degrading PAHs (over 96% were removed in 50 mins of irradiation by AM 1.5 G). This study sheds light on promising novel applications of halide perovskite.
Highlights
The development of economies can create problems such as energy shortages and environmental pollution, which are regarded as critical challenges to global sustainable development
The transmission electron microscopy (TEM, Figure 1b) revealed that the CsPbBr3 quantum dots (QDs) of a few nanometers were dispersed on Bi2 WO6 with a quasi-rectangle morphology
The two materials were subsequently confirmed by high-resolution transmission electron microscopy (HR-TEM), which showed the lattice spacing of CsPbBr3 ([220] = 0.20 nm) and Bi2 WO6 ([200] = 0.28) (Figure 1d), which can be compared to the diffraction results from Powder X-ray diffraction (PXRD)
Summary
The development of economies can create problems such as energy shortages and environmental pollution, which are regarded as critical challenges to global sustainable development. LaFeO3 , BaTiO3 , and so on [12,13,14,15,16,17] These semiconductors still have some common shortcomings, such as a narrow light absorption range and a high recombination ratio of photogenerated charges [18]. CsPbBr3 is very attractive due to its high thermal-stability and photo-resistance [35] Considering these advantages, CsPbBr3 was used to decorate Bi2 WO6 via a hydrothermal method in this work and the photoactivity was evaluated through the photocatalytic degradation of PAHs in tobacco tar under simulated solar light. The CsPbBr3 /Bi2 WO6 heterogeneous photocatalyst exhibited increased specific surface area and improved light absorption in the visible range, which effectively promoted the photocatalytic activity [36]. To the best of our knowledge, this work is the first to utilize perovskite for the degradation of PAHs
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
