Nano cocatalyst–catalytic system for boosting photothermal–photocatalytic water treatment enabled by visible LEDs

Abstract

Cocatalyst–catalytic system is rationally proposed in photothermal–photocatalytic water treatment.

Construction of highly efficient MoS2/BiOBr heterojunction for photocatalytic degradation of Rhodamine B

“…Downturns of degradation was noticed in the experiment when the MoS2 loading increased beyond 2wt% MoS2, indicating the photocatalytic activity of 3wt% MoS2-BiOBr had a decreasing. This result corresponded to prior experimental literature [10][11][12]. From figure 3a, when the reaction time was up to 60 min, the degradation efficiency of 2wt%MoS2/BiOBr was 96.0% and the of 1wt%MoS2/BiOBr-2 heterostructures was 94.4%, and 3wt%MoS2/BiOBr was 93.1%.…”

Advances in Photothermal Catalysis: Mechanisms, Materials, and Environmental Applications

“…Since antibiotics are difficult to biologically degrade, it has thus been challenging for antibiotic-containing wastewater treatment through conventional technologies. , To effectively remove antibiotics in wastewater, the photothermal effect is frequently combined with traditional photocatalysis to further improve the reaction efficiency . For example, Ni et al subtly designed a photothermal–photocatalytic system based on FBBov (defect-rich flower-like BiOBr) @MoS 2 (1:1) . According to the in situ thermal infrared imaging and electron spin resonance (ESR) tests, the co-catalyst MoS 2 enhanced ROS formation by promoting the spatial separation of photogenerated charge carriers and enhanced light absorption in the longer-wavelength range (Figure a,b).…”

“…Schematic depicting (a) the in situ thermal images of the TCH removal process, (b) ESR spectra of DMPO– • O 2 – (up) and DMPO– • OH (down) over FBBov and FBBov@MoS 2 (1:1), (c) photothermal degradation of TCH with six samples, and (d) TOC removal by FBBov@MoS 2 (1:1) during the whole process. Reproduced with permission from ref . Copyright 2023 Royal Society of Chemistry.…”

“…168 For example, Ni et al subtly designed a photothermal− photocatalytic system based on FBBov (defect-rich flower-like BiOBr) @MoS 2 (1:1). 169 According to the in situ thermal infrared imaging and electron spin resonance (ESR) tests, the co-catalyst MoS 2 enhanced ROS formation by promoting the spatial separation of photogenerated charge carriers and enhanced light absorption in the longer-wavelength range (Figure 10a,b). Consequently, under a 5 W LED lamp illumination, the FBBov@MoS 2 (1:1) system achieved a quick photothermal response and a notable catalytic activity with tetracycline and TOC removal rates of 95.9 and 62.9%, respectively (Figure 10c,d).…”