A high-efficiency Z-scheme Er3+:YAlO3@(Au/SrTiO3)-Au-WO3 photocatalyst for solar light induced photocatalytic conversion of Cr(VI)

2D–2D WO3–Bi2WO6 photocatalyst with an S-scheme heterojunction for highly efficient Cr(vi) reduction

“…The WO 3 -Bi 2 WO 6 heterostructure displays outstanding photocatalytic performance compared to WO 3 and Bi 2 WO 6 , and a 50 mg L −1 Cr(VI) solution can be reduced completely within 5 min. The photocatalytic performance is compared to that of semiconductor photocatalysts previously reported, 7,[64][65][66][67] which indicates that the photocatalytic performance presented here is good. The BET surface area of WO 3 , S2 and Bi 2 WO 6 is 2.57, 37.48 and 65.11 m 2 g −1 , respectively.…”

Fabrication of Er3+:YAlO3 fibers by electrospinning method for upconversion luminescence applications

“…Er 3+ :YAlO 3 is a promising upconversion material with excellent optical properties and has been extensively studied for its effective upconversion luminescence properties. 4,5 Under near-infrared/visible light excitation, Er 3+ :YAlO 3 can emit visible and ultraviolet light, which is highly desirable for biomedical imaging and other optoelectronic applications. The upconversion luminescence of Er 3+ :YAlO 3 is attributed to the f-f transition of the Er 3+ ions, which has a long excited-state lifetime and a large absorption cross-section.…”

“…13 Moreover, Er 3+ :YAlO 3 is widely employed in catalytic applications in combination with various catalysts for hydrogen production and photocatalytic degradation. 5,14,15 Currently, Er 3+ :YAlO 3 materials are predominantly utilized in the form of particles, and various synthesis methods, including solid-state reaction, sol-gel method and hydrothermal synthesis, have been developed for the preparation of Er 3+ :YAlO 3 nanoparticles. 8,16,17 While nanoparticles have many applications, one-dimensional materials such as fine fibers can exhibit novel physical and chemical properties in catalysis and optics, and avoid powder recovery issues.…”

“…Traditionally, the synthesis of Er 3+ :YAlO 3 sols involves the utilization of organic chelating agents, such as citric acid. 5 However, the introduction of organic compounds brings forth certain limitations, including the necessity for specific atmospheric conditions during heat treatment to prevent carbon contamination and the challenge of achieving a relatively high yield. 22 In contrast, the use of carbon-free sol can avoid these problems.…”

“…Among them, Erbium (Er)‐doped upconversion materials have been widely investigated due to the unique energy‐level structure of the Er 3+ ions. Er 3+ :YAlO 3 is a promising upconversion material with excellent optical properties and has been extensively studied for its effective upconversion luminescence properties 4,5 . Under near‐infrared/visible light excitation, Er 3+ :YAlO 3 can emit visible and ultraviolet light, which is highly desirable for biomedical imaging and other optoelectronic applications.…”