Graphite composition based on PET pyrolysis product

Patent metadata

Field	Value
Publication number	US-12043554-B2
Application number	US-202117513258-A
Country	US
Kind code	B2
Filing date	Oct 28, 2021
Priority date	May 1, 2019
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

High surface area 3D mesoporous carbon nanocomposites can be derived from Zn dust and PET bottle mixed waste with a high surface area. Simultaneous transformation of Zn metal into ZnO nanoparticles and PET bottle waste to porous carbon materials can be achieved by thermal treatment at preferably 600 to 800° C., and reaction times of from 15 to 60 minutes, after optionally de-aerating the reaction mixtures with N 2 gas. The waste-based carbon materials can have surface areas of 650 to 725 m 2 /g, e.g., 684.5 m 2 /g and pore size distributions of 12 to 18 nm. The carbon materials may have 3D porous dense layers with a gradient pore structure, which may have enhanced photocatalytic performance for degrading, e.g., organic dyes, such as methylene blue and malachite green. Sustainable methods make ZnO-mesoporous carbon materials from waste for applications including photocatalysis, upcycling mixed waste materials.

First claim

The invention claimed is:

1. A composition, comprising:
graphite; and
ZnO particles having an average diameter in a range of from 10 to 100 nm, in and/or on the graphite in a form of a mesoporous ZnO-graphite composite,
wherein the mesoporous ZnO-graphite composite has a BET surface area in a range of from 395 to 750 m 2 /g, and
wherein the mesoporous ZnO-graphite composite has an average pore size in a range of from 15 to 20 nm, and
wherein the mesoporous ZnO-graphite composite has a BET surface area in a range of from 600 to 725 m 2 /g.

2. The composition of claim 1 , wherein the graphite and the ZnO particles are at least 90 wt. % of total composition weight.

3. The composition of claim 1 , wherein the graphite is present in an amount of from 35 to 95 wt. %, relative to total composition weight, and/or
wherein the ZnO is present in the composition an amount of from 5 to 65 wt. %, relative to the total composition weight.

4. The composition of claim 1 , having a graphite-to-ZnO weight ratio in a range of from 1:1 to 5:1.

5. A composition, comprising:
graphite; and
ZnO particles having an average diameter in a range of from 10 to 100 nm, in and/or on the graphite in the form of a mesoporous ZnO-graphite composite,
wherein the mesoporous ZnO-graphite composite has an average pore size in a range of from 15 to 20 nm, and
wherein the mesoporous ZnO-graphite composite has a BET surface area of greater than 590 m 2 /g.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Mohamed Hanan Hussein Amin
• Alsanea Aamerah Abdulwahab
• Alomair Nuhad Abdullah
• Akhtar Sultan

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/393

  Metal or metal oxide crystallite size · CPC title

• B01J35/45

  Nanoparticles · CPC title