Wastewater purification composition for organic dyes

Patent metadata

Field	Value
Publication number	US-11827792-B2
Application number	US-202318317269-A
Country	US
Kind code	B2
Filing date	May 15, 2023
Priority date	Sep 12, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A composite nanomaterial of ZnO impregnated by, e.g., a green copper phthalocyanine compound (CuPc) can be an efficient solar light photocatalyst for water remediation. The composite may include hollow shell microspheres and hollow nanospheres of CuPc-ZnO. CuPc may function as a templating and/or structure modifying agent, e.g., for forming hollow microspheres and/or nanospheres of ZnO particles. The composite can photocatalyze the degradation of organic pollutants such as crystal violet (CV) and 2,4-dichlorophenoxyacetic acid as well as microbes in water under solar light irradiation. The ZnO—CuPc composite can be stable and recyclable under solar irradiation.

First claim

The invention claimed is:

1. A wastewater purification composition, comprising:
water
an organic dye, and
a photosensitizer composite, comprising:
tetra(4-thiophenyl)phthalocyaninatocopper(II); and
ZnO particles,

wherein the ZnO particles include first spheroid particles and second spheroid particles, wherein the first spheroid particles have an average diameter in a range of from 50 to 450 nm and the second spheroid particles have an average outer diameter in a range of from 0.5 to 5 μm.

2. The wastewater purification composition of claim 1 , wherein the tetra(4-thiophenyl)phthalocyaninatocopper(II) is present in an amount of from 2.5 to 15 wt. %, relative to a total weight of the photosensitizer composite.

3. The wastewater purification composition of claim 1 , wherein the photosensitizer composite is synthesized hydrothermally.

4. The wastewater purification composition of claim 1 , wherein the photosensitizer composite the molar ratio of Cu to Zn is in a range of from 3:1 to 1:3.

5. The wastewater purification composition of claim 1 , wherein the photosensitizer composite the first spheroid particles have a sphericity of at least 0.85, and/or are hollow.

6. The wastewater purification composition of claim 1 , wherein the photosensitizer composite the second spheroid particles are hollow spheres having a sphericity of at least 0.9, and/or hollow hemispheres, which when extrapolated to spheres, have a sphericity of at least 0.9.

7. The wastewater purification composition of claim 1 , wherein the photosensitizer composite the second spheroid particles have nanorods, protruding outwardly, orthogonally to spherical surfaces, and
wherein the nanorods have an average diameter in a range of from 1 to 250 nm.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Moustafa Tamer Ezzat Youssef
• Besisa Hanan Hussein Amin Mohamed

Classifications

• C09B47/045 Primary

  Special non-pigmentary uses, e.g. catalyst, photosensitisers of phthalocyanine dyes or pigments · CPC title

• C01G9/02 Primary

  Oxides; Hydroxides · CPC title

• C02F1/32

  with ultraviolet light · CPC title

• C09B47/085

  substituting the central metal atom · CPC title

• H01B1/00

  Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors · CPC title