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A “bottle-around-ship” like method synthesized yolk-shell Ag3PO4@MIL-53(Fe) Z-scheme photocatalysts for enhanced tetracycline removal
Xiaopei Li ,
Zhuotong Zeng ,
Guangming Zeng ,
Dongbo Wang ,
Rong Xiao ,
Yingrong Wang ,
Chenyun Zhou ,
Huan Yi ,
Shujing Ye ,
Yang Yang ,
Weiping Xiong
November 2019
November 2019
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Abstract
<p class="first" id="d8993843e166">A novel yolk-shell Ag3PO4@MIL-53(Fe) Z-scheme photocatalyst
was fabricated via a "bottle-around-ship"
like method. Experiments on the treatment of tetracycline upon visible light irradiation
showed that the as-prepared photocatalyst possessed excellent photocatalytic performance.
Experimental results showed that tetracycline removal efficiency of the yolk-shell
Ag3PO4@MIL-53(Fe) Z-scheme photocatalyst was almost 3 times higher than that of MIL-53(Fe).
The enhanced photocatalytic performance of Ag3PO4@MIL-53(Fe) nanocomposite could be
contributed to its higher surface area, better absorption capability, and greater
charge separation efficiency. In addition, the H2O2 concentration detection results
for Ag3PO4 (154 μmol/L) and Ag3PO4@MIL-53(Fe) (52 μmol/L) indicated that a big part
of generated H2O2 on the Ag3PO4 core would be quickly decomposed by the MIL-53(Fe)
shell and generated more reactive species through the photo-Fenton-like reaction,
which is beneficial for the improvement of photocatalytic performance. This is a promising
approach to fabricate yolk-shell structure photocatalyst and a different aspect to
design multiple semiconductor composites heterojunction for environmental remediation.
</p>