Solvothermal Treatment of Visible‐Light‐Responsive TiO₂ toward Enhanced Photocatalytic Degradation Activity of Tetracycline

Abstract

Photocatalytic degradation of organic pollutants driven by visible‐light is considered as a promising and effective water purification strategy. In this work, solvothermal treatment was carried out on visible‐light‐responsive TiO2 samples in isopropyl alcohol to improve the photocatalytic degradation performance. The effects of solvothermal treatment on the microstructure, band structure, optical properties, photoelectrochemical properties and photocatalytic activity of the obtained TiO2 samples were systematically investigated. The experimental results showed that the photocatalytic degradation performance of the treated TiO2 samples was significantly improved. The TiO2 sample treated for 24 h at 180 °C showed the optimal kinetic constant of photocatalytic degradation of tetracycline, which is 4.7 times that of pristine TiO2. This work provides some insight into the effect of solvothermal treatment on the photocatalytic properties of semiconductor photocatalysts.

NiFe-LDH/g-C3N4 binary heterostructures with 2D/2D configuration for highly efficient photocatalytic degradation of antibiotics and hydrogen production

“…The dissolved O 2 can be captured by the accumulated electrons in CB of CN to form an active species ·O 2 − (e − + O 2 → ·O 2 − ), which participates in photocatalytic TC degradation. 36 Meanwhile, the holes accumulated in the VB of LDH cannot react with H 2 O or OH − to form ·OH because the potential of H 2 O/·OH (1.99 eV vs. NHE) is more positive than the energy level of VB on LDH. Thus, the holes accumulated on the VB of LDH decomposes TC.…”

“…photocatalytic TC degradation 36. Meanwhile, the holes accumulated in the VB of LDH cannot react with H 2 O or OH − to form •OH because the potential of H 2 O/•OH (1.99 eV vs. NHE) is more positive than the energy level of VB on LDH.…”

Modulating Visible-Light Driven NIR Lanthanide Polymer Photocatalysis for Amplification Detection of Exosomal Proteins and Cancer Diagnosis

“…2,2,6,6-Tetramethylpiperidide (TEMP) serves as the capture reagent of 1 O 2 to generate a TEMP/ 1 O 2 adduct with a typical EPR intensity signal of 1:1:1 (Figure S21). However, the VB potential of the SDBSmodulated lanthanide polymer (E VB = 1.97 V vs NHE) is less positive than the oxidation potential of the OH/OH − oxidation potential (2.38 V vs NHE), 38,39 inferring that the photogenerated holes cannot oxidize OH − to generate •OH, its violations with EPR results. Therefore, in the process of photocatalytic ROS intermediates, it is speculated that the further reduced •O 2 − can be regarded as the source of •OH.…”

Manipulating the Photocatalytic Activity of Eu-Coordinated Hydrogen-Bonded Organic Framework Nanorods Decorated With Au Nanoclusters for the Multiplexed Luminescence Assay of Acetylcholinesterase

“…Nanozymes, as low-cost nanomaterials with enzyme-like activity comparable to natural enzyme, featuring the characteristics of high catalytic efficiency, excellent stability, and large-scale preparation, have gained widespread attention in various fields, including biological sensing, , catalysis, − immunoassay, , bioimaging, etc. Among different types of nanozymes, noble metal-based nanocrystals (NCs) have gradually developed into hot research in the field of nanobiomedicine due to excellent optical, electrical, and catalytic properties, as well as good biocompatibility and stability .…”