ZIF‐8 Derived ZnO Decorated with Polydopamine and Au Nanoparticles for Efficient Photocatalytic Degradation of Rhodamine B

Abstract

The drawbacks of low utilization efficiency of solar energy and high recombination rate of photogenerated charge carriers limit the application of ZnO in photocatalytic reaction. In this study, a novel photocatalyst of ZnO decorated with polydopamine (PDA) and Au nanoparticles was successfully fabricated, using zeolite imidazolate frameworks (ZIF-8) as ZnO precursor, followed by decorating with PDA and Au nanoparticles. The photocatalytic performance in degradation of rhodamine B (RhB) demonstrated that ZnO@PDA-Au-3 exhibited the most excellent photocatalytic activity. It could degrade 99 % of RhB in 24 min under UV-vis light irradiation, in contrast with the degradation rate of 40 % and 16 % on ZnO@PDA and ZnO, respectively. The excellent catalytic activity was attributed to the contribution of PDA and Au. Particularly, Au not only promoted the absorption of visible light through localized surface plasmonic resonance (LSPR) effect, but also effectively facilitated the separation of photogenerated charge carriers though the Schottky barrier.

Anthraquinone and its Derivatives as a Recyclable Photocatalyst for Efficient Photocatalytic Degradation of Rhodamine B in Water under Visible Light

“…[26][27][28] For this purpose, many researchers have devoted themselves to the research and development of various photocatalysts for the degradation of RhB, such as ZnO, [29][30] TiO 2 , [31][32][33] SnO 2 [34] and CdS [35] and their modified catalytic materials. [36][37][38][39][40] Recently, the unique photocatalytic properties of ternary metal oxide semiconductors including Ag-AgMoO 3 , Co 3 O 4 -Bi 2 O 3 , BiVO 4 -rGO, PtBi 2 MoO 6 , and Zn 2 SnO 4 -BC have also attracted a lot of attention. [41][42][43][44][45][46][47][48][49] Typically, these catalysts consist of heavy metal ions, which are not conducive to wastewater treatment.…”

“…Photocatalytic technology has been extensively used for the decomposition of organic pollutants as a sustainable and readily accessible green solution to mitigate energy scarcity and environmental contamination [26–28] . For this purpose, many researchers have devoted themselves to the research and development of various photocatalysts for the degradation of RhB, such as ZnO, [29–30] TiO 2 , [31–33] SnO 2 [34] and CdS [35] and their modified catalytic materials [36–40] . Recently, the unique photocatalytic properties of ternary metal oxide semiconductors including Ag‐AgMoO 3 , Co 3 O 4 ‐Bi 2 O 3 , BiVO 4 ‐rGO, PtBi 2 MoO 6 , and Zn 2 SnO 4 ‐BC have also attracted a lot of attention [41–49] .…”

Copper‐Decorated Magnetite Polydopamine Composite (Fe3O4@PDA): An Effective and Durable Heterogeneous Catalyst for Pyranopyrazole Synthesis

“…Inspired by the exceptional coating excellence and functionality, [32][33][34] PDA has been chosen as the reagent of choice for surface modification in a wide variety of catalytic systems. [35][36][37] PDA can be utilized as reductants since it has enough catechol and amine groups and binders so that the reduction of metals can be successfully achieved without adding the external reducing agent. [34,38,39] In this study, we use PDA to generate Fe 3 O 4 @PDA/ CuCl 2 nanocomposites, which we then use to fabricate a synthesis of structurally diverse pyranopyrazoles in the absence of any reducing agent.…”