Combustion Synthesis and Enhancement of BiOCl by Doping Eu³⁺ for Photodegradation of Organic Dye

Abstract

Eu3+‐doped BiOCl with different doping concentrations was synthesized by a simple combustion method. The as‐synthesized photocatalysts were characterized by X‐ray diffraction, scanning electron microscope, transmission electron microscope, Raman spectroscopy, X‐ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and UV–vis diffuse reflectance spectroscopy. The experimental results show that Eu3+ was successfully doped into the lattice of BiOCl. The as‐synthesized Eu3+‐doped BiOCl photocatalysts show a more intense continuous absorption in UV light region, accompanied with decreased energy band gap. Moreover, the Eu3+ doping leads to the formation of oxygen vacancies, small crystallite size, and high specific surface areas. Compared with pure BiOCl, the Eu3+‐doped BiOCl photocatalysts exhibits much higher photocatalytic activity for Rhodamine B (RhB) under UV light irradiation. As‐obtained Eu3+‐doped BiOCl can be easily reused with excellent stability. In addition, the mechanism of the improved photocatalytic properties of Eu3+‐doped BiOCl was discussed in detail.

Dy(III) Doped BiOCl Powder with Superior Highly Visible-Light-Driven Photocatalytic Activity for Rhodamine B Photodegradation

“…After the introduction of Dy, the diffraction peak of BiOCl had no obvious displacement, which was similar to the investigation of Eu-doped BiOCl. Similar phenomena were observed through investigations of Cu-, Co-, and Fe-doped BiOCl [ 13 , 14 , 15 , 16 ]. The Dy 2 O 3 phase or other impurity peaks were not observed.…”

Oxygen‐Deficient BiOBr as a Highly Stable Photocatalyst for Efficient CO2 Reduction into Renewable Carbon‐Neutral Fuels

“…Herein, we present a highly facile one‐pot ethylene glycol (EG)‐assisted solvothermal approach for the synthesis of BiOBr nanosheets with oxygen vacancy defects, which is denoted as oxygen‐deficient BiOBr. The procedure is relatively simple and does not employ conventional methods such as metal doping or electroreduction to induce oxygen‐deficient defects into the sample. In the present study, considerable amounts of oxygen vacancies were introduced on the {0 0 1} facets of BiOBr by thermal treatment in a reducing atmosphere, in which EG played an indispensable role to remove surface oxygen atoms from BiOBr, resulting in selective formation of oxygen‐deficient defects on the sample surface.…”

Facile one‐step synthesis of Nd‐doped BiOCl nanoparticles with the excellent photocatalytic behavior

“…Since, electrons are filled in the conduction band by donor atom. Therefore, a change in the transition levels broadens the band gap of Nd‐doped BiOCl (Table ) …”