Preparation and study of p–n junction YMnO3/TiO2 composite photocatalysts for the degradation of tetracycline hydrochloride

Photocatalytic activity and mechanism of YMnO3/NiO photocatalyst for the degradation of oil and gas field wastewater

“…Figure 2 depicts the FTIR spectra of YMO@NO 1%, YMO@NO 3% and YMO@NO 5%. The H-O stretching vibration and H-O-H bending vibration are responsible for the characteristic peaks at 3435 and 1632 cm -1 for all samples, respectively ( Kumar et al, 2019 ; Dang et al, 2024 ). The presence of the above two characteristic peaks in YMO@NO samples confirms that the samples adsorbed small amounts of water molecules during storage.…”

“…In the low wave number segment, the characteristic peaks of 641, 597, 547 and 489 cm -1 appear in YMO@NO 1% photocatalyst. The peaks at 597, 547 and 489 cm -1 can be ascribed to the Mn-O stretching vibration, Y-O stretching vibration and Mn-O-Mn bending vibration, respectively ( Kumar et al, 2019 ; Dang et al, 2024 ). As Iliev and colleagues’ ( Iliev et al, 1997 ) calculation, there is no mode that the peak at 641 cm -1 can be assigned to in this study due to the YMO in the YMO@NO 1% photocatalyst.…”

“…2) The modification of metal particles on the surface of YMO enhances its active site, thus enhancing the catalytic activity of YMO ( González-Castaño et al, 2021 ). 3) The photocatalytic activity of the system was enhanced by introducing another semiconductor material to form the YMO-base heterojunction ( Cao et al, 2018 ; Wu et al, 2019 ; Wang and Song, 2020 ; Wang and Tian, 2020 ; You et al, 2020 ; Wang et al, 2022 ; Zhang et al, 2022 ; Li et al, 2023 ; Wang et al, 2023 ; Yulizar et al, 2023 ; Dang et al, 2024 ). The construction of heterojunction is an effective method to improve the photocatalytic activity of YMO.…”

“…It is worth noting that the target products synthesized by different preparation methods will have different surface morphologies, which will help to obtain semiconductor materials with better performance ( Wang et al, 2011 ; Wu et al, 2019 ; You et al, 2020 ; Dang et al, 2024 ). Hydrothermal method is an effective method to control the surface morphology of semiconductor photocatalysts by using surfactants.…”

Synthesis and full-spectrum-responsive photocatalytic activity from UV/Vis to near-infrared region of S-O decorated YMnO3 nanoparticles for photocatalytic degradation of ibuprofen

“…(1) The optical band gap value of YMO was improved by ion doping, and its photocatalytic activity was also increased ( Zhang et al, 2011 ; Munisha et al, 2023 ). (2) The photocatalytic activity of YMO was enhanced by combining with other semiconductors with excellent photocatalytic performance ( Cao et al, 2018 ; Wu et al, 2019 ; Wang and Song, 2020 ; Wang and Tian, 2020 ; You et al, 2020 ; Wang et al, 2022 ; Zhang et al, 2022 ; Li et al, 2023 ; Wang et al, 2023 ; Yulizar et al, 2023 ; Dang et al, 2024 ). However, no one has yet synthesized SO 4 2- surface decorated YMO (YMO-SO) photocatalyst to enhance the photocatalytic activity of YMO by a simple heat-treating YMO with sulfuric acid.…”