Tetracycline Removal Under Solar Illumination Over Ag₃VO₄/mpg‐C₃N₄ Heterojunction Photocatalysts

Abstract

Ag VO /mpg-C N (mesoporous graphitic carbon nitride) heterojunction photocatalysts were prepared by anchoring tiny Ag VO particles on the nanosheet of mpg-C N . The prepared Ag VO /mpg-C N heterojunctions were used to remove tetracycline (TC), a kind of antibiotics widely released into the aquatic environment under solar irradiation. Compared with pure mpg-C N and Ag VO , Ag VO /mpg-C N displayed much higher photocatalytic activity (83.2% removal rate within 90 min under visible-light irradiation). Importantly, no apparent deactivation was observed for Ag VO /mpg-C N -40 after five cycles, inferring a good reusability. As confirmed by photocurrent measurement and photoluminescence spectra, the excellent photocatalytic property of Ag VO /mpg-C N was credit to the electron-hole separation enhancement at the formed heterojunction of two semiconductors. In addition, a possible mechanism and intermediate products for the Ag VO /mpg-C N photocatalysts toward the photodegradation of TC in aqueous solution under artificial sunlight radiation were proposed based on the scavengers trapping test, ESR spectra and a high-performance liquid chromatography (HPLC) coupled with mass spectrometer (MS) analysis. This investigation provides a low cost, green and easily practical approach to remove the antibiotics in the aquatic environment.

Synthesis of Nano CdZnS/SnS2/SnO2 Heterojunction for Photocatalytic Degradation of Rhodamine B

“…It can be stated that CdZnS/SnS 2 /SnO 2 will be more efficient than other photocatalysts in transferring the photogenerated carriers to the adsorbed pollutants. The comparison of photoexcited carrier separation and photocatalysts efficiency is widely used to be analyzed by transient photocurrent [46] . The transient photocurrent responses of five samples for ten on‐off cycles are displayed in Figure S5.…”

“…The comparison of photoexcited carrier separation and photocatalysts efficiency is widely used to be analyzed by transient photocurrent. [46] The transient photocurrent responses of five samples for ten on-off cycles are displayed in Figure S5. Compared with the other samples, the CdZnS/SnS 2 /SnO 2 heterostructure has higher transient photocurrent density.…”

Titanosilicate ETS‐10 Molecular Sieve Anchored Silver Nanoparticles for Efficient Photocatalytic Degradation of Tetracycline Hydrochloride: Synergetic Effect of H2O2 and Ag/ETS‐10 under Visible Light

“…It is concluded that all tested working electrodes are increased photocurrent responses after irradiation, and the generated photocurrents are stable and reproducible. The Ag/ETS‐10 sample is more stable and exhibited higher photocurrents than the ETS‐10, demonstrating a longer lifetime and more efficient separation of photoinduced e − ‐h + pairs [44] . To study the charge transport properties and interfacial resistance of ETS‐10 and Ag/ETS‐10 samples, the electrochemical impedance (EIS) measurements were used to analyze and the results are shown in Figure 7b.…”

“…The Ag/ETS-10 sample is more stable and exhibited higher photocurrents than the ETS-10, demonstrating a longer lifetime and more efficient separation of photoinduced e À -h + pairs. [44] To study the charge transport properties and interfacial resistance of ETS-10 and Ag/ETS-10 samples, the electrochemical impedance (EIS) measurements were used to analyze and the results are shown in Figure 7b. The radius of photocatalyst Ag/ETS-10 is much smaller than that of ETS-10, which further demonstrates that Ag/ETS-10 reduces the recombination probability of e À -h + pairs and promotes the transfer of photo-generated electrons.…”

Adsorption of Zn(ii) on amination@wood-aerogel and high-value reuse to ZnO/ZnS as an efficient photocatalyst

“…To identify the dominant active species in photocatalysis, the free radical trapping experiments were carried out by adding EDTA-2Na, isopropyl alcohol (IPA), and benzoquinone (BQ) to quench h + , cOH, and cO 2 À , respectively. 53 It can be seen that the photocatalytic activity is restrained on adding the EDTA-2Na, IPA, and BQ scavengers under UV-light irradiation (Fig. S19a †).…”