US 12630446 B1Patent grantUnited States

Cobalt Nanocomposite for Dye Removal

Official patent title

Cobalt oxide/calcium silicate@graphitic carbon nitride (CoO/CaSi03@g-C3N4) nanocomposite as an effective adsorbent

Arabic title: مركب نانوي من أكسيد الكوبالت/سيليكات الكالسيوم@نتريد الكربون الغرافيتي (CoO/CaSiO3@g-C3N4) كمادة مازة فعالة

Invention

Problem

Industrial pollutants can persist in water, while conventional adsorbents and unmodified g-C3N4 may provide limited surface area, adsorption capacity, or practical recovery.

Why it matters

A filter-recoverable nanocomposite could support dye and wastewater adsorption research, but pollutant selectivity, cobalt release, particle retention, regeneration, spent-media handling, hydraulic performance, and real-effluent behavior require independent verification.

Approach

The method mixes contaminated water with CoO/CaSiO3@g-C3N4, adsorbs pollutants onto the composite, and removes the loaded material by filtration.

Who may benefit

Potential beneficiaries include water-treatment researchers, dye-intensive industries, adsorbent manufacturers, environmental laboratories, filtration-media developers, and materials teams studying g-C3N4 composites.

Potential value

The disclosure combines a three-phase porous adsorbent, a stated basic-fuchsin capacity, defined particle and pore dimensions, and an explicit post-adsorption filtration step.

Background

Industrial activities such as electroplating, mining, textiles, and battery manufacturing can release toxic metal ions and other pollutants into water. Adsorption is attractive because it can be operationally simple and effective at low concentrations. Graphitic carbon nitride offers chemical and thermal stability, visible-light activity, and accessible synthesis, but its relatively low surface area can limit adsorption. Incorporating metal-oxide particles onto g-C3N4 nanosheets is presented as a route to modify surface and pore properties while retaining a particulate material that can be removed by filtration.

Technology overview

Claim 1 mixes polluted water with a CoO/CaSiO3@g-C3N4 composite and filters the material after adsorption. Hexagonal CoO and CaSiO3 particles are dispersed on g-C3N4 nanosheets and average 340 to 440 nm in diameter. The composite has a stated basic-fuchsin adsorption capacity of at least 20 mg/g, a unimodal pore distribution with an average pore diameter of 10 to 30 nm, and a CoO:CaSiO3:g-C3N4 phase ratio of 1-2:1-2:2-6. Dependent claims provide narrower capacity, size, and porosity values.

Potential applications

Potential adsorption of basic fuchsin from water.
Screening of dye-containing industrial wastewater.
Development of filter-recoverable particulate adsorbents.
Research on cobalt-oxide/calcium-silicate/carbon-nitride sorbents.

Evidence-supported advantages

Combines CoO and CaSiO3 particles with a g-C3N4 nanosheet matrix.
Defines basic-fuchsin capacity, particle size, and pore dimensions.
Includes filtration as a material-recovery operation.
Provides multiple dependent ranges for adsorption and porosity comparison.

Development stage

The patent publication states material characteristics and basic-fuchsin adsorption capacities; commercialization was not established, and the reported performance and development stage were not independently verified.

Commercial opportunity

The material could support specialty dye-sorbent or treatment-media development. Commercial assessment should verify capacity and kinetics in mixed effluents, selectivity, pressure drop, filtration efficiency, cobalt and particle release, regeneration cycles, spent-sorbent disposal, manufacturing repeatability, and lifecycle performance against incumbent adsorbents.

Patent classifications

WIPO IPC

C02F1/28Treatment of water, wastewater, sewage or sludge
B01J20/02Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus

CPC

B01J35/633Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
C02F1/288Treatment of water, wastewater, sewage or sludge
B01J20/0225Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J20/28083Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J21/16Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J27/24Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/45Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/613Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/647Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/77Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
C02F1/281Treatment of water, wastewater, sewage or sludge
B82Y30/00Specific uses or applications of nanostructures; measurement or analysis of nanostructures; manufacture or treatment of nanostructures
C02F2101/30Treatment of water, wastewater, sewage or sludge
C02F2305/08Treatment of water, wastewater, sewage or sludge

Inventors

First inventorMohamed Khairy Abdel Fattah Omran
InventorBabiker Yagoub Elhadi Abdulkhair

Keywords

adsorption
basic fuchsin
CoO
CaSiO3
g-C3N4
water purification
nanocomposite
filtration

Patent document and drawings

The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.