Kinetics, reaction pathways, and mechanism investigation for improved environmental remediation by 0D/3D CdTe/Bi2WO6 Z-scheme catalyst

Easy synthesis of high (110) facet-exposed BiOCl microspheres with excellent visible light degradation capability towards RhB

“…It is obvious that BiOCl-0.075 demonstrates the weakest emission. The higher PL intensity means higher recombination rate and shorter lifetime of photoinduced charges [26], thus, the separation efficiency of photogenerated electrons and holes should be: BiOCl-0.075>BiOCl-0.1>BiOCl-0.05>BiOCl-0.15>BiOCl-0.2, which is consistent with the exposed (110) facets ratio of different samples (figure 1). It confirms that the increased exposed ratio of (110) facets is conducive to enhance the separation efficiency of photogenerated electrons and holes and extend the lifetime of photogenerated carriers.…”

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

“…For pathway II: the intermediate product (m/z = 427) could be attributed to the loss of hydroxyl groups. The product (m/z = 410) was attributable to the loss of C–NH 2 [ 41 ]. Pathway III: The product (m/z = 491) was formed by oxidation of double bonds, leading to the addition of hydroxyl and ketone group [ 38 ].…”

CdTe Quantum Dot/Bi2WO6 Nanosheet Photocatalysts with a Giant Built-In Electric Field for Enhanced Removal of Persistent Organic Pollutants

“…Upon visible light irradiation for 90 min, the peak area and intensity of tetracycline minimized significantly, indicating that tetracycline was decomposed (Figure 7c). The total ion chromatogram clearly displayed three new peaks behind that of tetracycline (within the marked region), 26,47 According to Figure S16 and Note S9, this process is speculated to mainly involve the hydroxylation process, and main pathways are exhibited in Figure 7g.…”

“…The treatment of bacterial diseases by using tetracycline leads to overwhelming influence of antibiotics on the aquatic environment, and photocatalysis is considered a promising viable strategy to degrade tetracycline in water. 26 We further investigated the photodegradation of other contaminants, including phenol and RhB. Compared to 2DBWO that degrades 88.12% of phenol at 120 min, CdTeQDs/2DBWO shows a degradation efficiency up to 98.04% under the identical circumstance (Figure 6d).…”

“…Two-dimensional (2D) semiconductor materials are prospective building blocks to construct Z-scheme photocatalysts due to the minimized resistance and fully exposed active sites. − 2D Bi 2 WO 6 (2DBWO) nanosheets, with a band gap of 2.6–2.8 eV, are endowed with prominent photocatalytic properties and high stability. − However, the energy band structure of BWO results in poor separation of the photoexcited charge carriers and solar energy absorption ability, thus resulting in low photocatalytic capability. − In contrast to pure 2DBWO, it provides a viable strategy to enhance the photocatalytic activity by coupling with semiconductors of high optical absorption coefficients, which contributes to promoting the generation of ROS such as • O 2 – and • OH. , Among semiconductors, cadmium telluride quantum dots (CdTeQDs) have been used to construct a Z-scheme heterojunction with 2DBWO nanosheets because of their high visible light absorption efficiency and quantum confinement effect. The fabrication of a Z-scheme CdTeQDs/2DBWO photocatalyst can achieve high separation efficiency of photogenerated charge carriers through transferring electrons from the conductor band (CB) of the BWO nanosheet to the valence band (VB) of CdTeQDs.…”