ZnO nanorod/nickel phthalocyanine hierarchical hetero-nanostructures with superior visible light photocatalytic properties assisted by H₂O₂

Abstract

Needle-like ZnO nanorod (ZnO-NR)/2,9,16,23-tetra-phenoxy nickel phthalocyanine (TPNiPc) nanofiber hierarchical hetero-nanostructures have been successfully designed and constructed via a two-step hydrothermal approach on zinc foil. The as-prepared ZnO-NR/TPNiPc hierarchical hetero-nanostructure exhibited superior photocatalytic activities in degradation of Rhodamine B assisted by H 2 O 2 under visible light irradiation with excellent efficiency, recyclability and stability. The intermolecular electron transfer in the process of photocatalysis was further confirmed by the enhanced photocurrent. This method offers a simple, economical, and convenient way to obtain a highly efficient visible-light photocatalyst based on ZnO, showing great industrial application potential in eliminating the organic pollutants from wastewater.Scheme 2 Illustrative diagram for the photocatalytic mechanism of ZnO-NRs/TPNiPc hierarchical hetero-nanostructure assisted with H 2 O 2 , VB ¼ valence band, CB ¼ conduction band, HOMO ¼ highest occupied molecular orbital and LUMO ¼ lowest occupied molecular orbital.This journal is

Carbon nanotubes-based PdM bimetallic catalysts through N4-system for efficient ethanol oxidation and hydrogen evolution reaction

“…S3). Those findings indicate that Mn-atom has the highest entrance/interaction into the Pd lattice in PdMn/CNTs sample and less into the PdMn-N 4 /CNTs sample, probably due to free Mn addition (MnCl 2 ) into PdMn/CNTs and coordinated Mn in MnPc (Mn-N 4 ) into PdMn-N 4 /CNTs 50,51 . This result agrees well with the lattice d -spacing data using HRTEM.…”

Noble‐metal‐free MOF Derived ZnS/CeO2 Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character

“…[28] Among various strategies, one of the most ideal strategies for the visible light response is to joint narrow band gap semiconductors onto the surfaces of wide band gap (E g ) semiconductors to form the heterojunction by which increases the light absorption range to the solar spectrum. [29][30] CeO 2 is preferred candidate due to its unique superiorities such as high chemical stability and environmental friendliness, Ce (III) and Ce (IV) oxidation state conversion is easy which has a suitable valence band with ZnS. [31,32] In addition, CeO 2 has the higher oxygen-storage/release capacity and can also response to visible light which has been widely researched in the photocatalysis, especially in the photocatalytic hydrogen production fields.…”

“…In order to solve the problem, the numerous attempts have been made to extend the light absorption of ZnS into the visible light region for photocatalytic H 2 evolution, such as doping [27] and coupling with narrow bandgap semiconductors [28] . Among various strategies, one of the most ideal strategies for the visible light response is to joint narrow band gap semiconductors onto the surfaces of wide band gap (E g ) semiconductors to form the heterojunction by which increases the light absorption range to the solar spectrum [29–30] . CeO 2 is preferred candidate due to its unique superiorities such as high chemical stability and environmental friendliness, Ce (III) and Ce (IV) oxidation state conversion is easy which has a suitable valence band with ZnS [31,32] …”

Photocatalytic Degradation of Rhodamine B Using Zinc Oxide Activated Charcoal Polyaniline Nanocomposite and Its Survival Assessment Using Aquatic Animal Model

“…This technique has advantages over dye degradation without producing any secondary pollution to the environment. However, it is significant to get the degraded products that do not disturb the biological systems . TOC and COD measurements are used to find out the quality of water.…”

“…These drawbacks mainly affect the photocatalytic activity of single phase semiconductor metal oxide nanoparticles. Therefore, suitable modification of these semiconductor nanoparticles has been done to overcome the downsides. ,, Recently, delocalized conjugated polymers, carbon materials have been widely used as composite material to overcome the aforementioned drawbacks. Meanwhile the lowest unoccupied molecular orbital (LUMO) level of conjugated polymer is greater than the conduction band of ZnO, it could transfer the generated electrons under visible light irradiation which is thermodynamically favorable. , The conducting polymers act as photosensitizers and suppress the electron hole pair recombination of metal oxide nanoparticles that could enhance the photocatalytic activity of the composite material under visible light .…”