Waste Lithium Battery Catalyst on Attapulgite for CO2 Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for converting CO2 using photothermal catalysis are limited by the low intrinsic activity of catalysts like Co3O4, necessitating the development of a more active and robust catalyst for efficient CO2 conversion.
Innovation Solution
A method is developed to prepare a supported catalyst using waste lithium batteries and attapulgite (ATP) through carbothermal reduction and microwave hydrothermal treatment, resulting in a Co3(Ti)O4/acidified attapulgite (H-ATP) composite catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Co3O4 catalyst is used for CO2 conversion, then CO2 conversion can be achieved, but the intrinsic activity of the catalyst is low
Solution Approach 1:
The patent creates a composite catalyst system consisting of Co3O4 nanoparticles supported on acidified attapulgite (H-ATP) with biochar modification. This composite structure combines the catalytic activity of Co3O4 with the high surface area and adsorption capacity of H-ATP, and the charge transfer channels provided by biochar, resulting in enhanced overall catalytic performance for CO2 conversion
Solution Approach 2:
The patent utilizes the porous structure of attapulgite (ATP) as a catalyst carrier. The abundant pore structure of ATP provides high surface area and numerous active centers for CO2 adsorption and activation, significantly improving the catalyst's intrinsic activity and CO2 conversion efficiency
2Ease of manufacture
If waste lithium battery is used as catalyst precursor, then cost is reduced, but catalyst activity needs improvement
Solution Approach 1:
The patent transforms waste lithium battery materials, which would otherwise be environmental pollutants, into valuable catalyst precursors. Through carbothermal reduction, the waste lithium battery cathode materials are converted into active Co3O4 catalyst species, achieving both waste resource utilization and high-performance catalyst preparation simultaneously
Solution Approach 2:
The patent employs carbothermal reduction at controlled temperatures (500-700°C) to transform the chemical composition and structure of waste lithium battery materials. This thermal treatment converts the precursor materials into active catalytic phases with optimized crystal structure and surface properties, enhancing catalyst activity
3Reliability
If attapulgite is used as catalyst carrier, then abundant active centers are provided, but acidification treatment is required to maximize performance
Solution Approach 1:
The patent performs acidification treatment of attapulgite before catalyst synthesis to pre-modify the carrier properties. This preliminary acidification creates more active sites and improves the surface chemistry of ATP, optimizing it for subsequent catalyst deposition and enhancing the overall catalytic performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The Co3(Ti)O4/H-ATP composite catalyst exhibits enhanced CO2 conversion efficiency, with improved adsorption and activation capabilities due to the plasmonic resonance effect, abundant active centers, and charge transfer channels provided by the biochar and H-ATP.
Implementation Method 1
heating and calcining, to obtain a solid sample after carbothermal reduction treatment
Implementation Method 2
ultrasonically dispersing the attapulgite in an acid solution for modification
Implementation Method 3
the plasmonic resonance effect, abundant active centers, and charge transfer channels provided by the biochar and H-ATP
Implementation Method 4
performing a microwave hydrothermal reaction
Implementation Method 5
performing a microwave hydrothermal reaction, obtaining a sample after centrifuging, washing, and drying, and then performing muffle calcination on the sample
Data Source
AI summary
A method for preparing a supported catalyst, including mixing waste lithium battery cathode material and biomass uniformly to obtain a mixture, then putting the mixture into a tube furnace for nitrogen purging, and then heating and calcining to obtain a solid sample after carbothermal reduction treatment; hydrothermally stirring the solid sample, followed by filtration to recover a residue, and drying the residue to obtain a mixed sample of Co3O4, TiO2, and biochar, labeled as TCO; ultrasonically dispersing the attapulgite in an acid solution, stirring in a water bath at 80° C. to obtain a product, washing the product until neutral, filtering, and then drying to obtain an acidified attapulgite (H-ATP); and weighing the TCO, ultrasonically dispersing the TCO in a mixed solution of deionized water and N, N dimethylformamide (DMF), adding the H-ATP into the mixed solution, and performing a microwave hydrothermal reaction, obtaining a sample after centrifuging, washing, and drying, and then performing muffle calcination on the sample to obtain the supported catalyst Co3(Ti)O4/H-ATP.