Electron-Poor Cu Catalyst for Phenolic Pollutant Degradation
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Solution Overview
Problem
Traditional Fenton-like catalysts with an electron-rich Cu center exhibit low mineralization of phenolic pollutants and poor degradation of macromolecular organic pollutants, leading to inefficient wastewater treatment due to high oxidant consumption and limited catalytic stability.
Innovation Solution
A Fenton-like catalyst material with an electron-poor Cu center is developed through a preparation method involving bismuth nitrate pentahydrate, citric acid, aluminium isopropoxide, and copper chloride dihydrate, followed by calcination, resulting in a (Bi, Cu)Al2O3 catalyst with a fluffy porous structure and enhanced σ-Cu-ligand action, facilitating effective degradation of phenolic compounds and macromolecular pollutants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Fenton-like catalysts with electron-rich Cu center are used, then the catalyst can activate hydrogen peroxide, but the mineralization of phenolic pollutants is low and the degradation of macromolecular organic pollutants is poor
Solution Approach 1:
The patent changes the electronic state parameter of the Cu center from electron-rich to electron-poor by adjusting the catalyst composition and structure. This parameter change transforms the catalytic mechanism to enable both high mineralization of phenolic pollutants and effective degradation of macromolecular organic pollutants while maintaining catalytic stability
Solution Approach 2:
The patent develops a composite catalyst material containing Cu, Al, and other elements with specific ratios and structures. The composite structure synergistically combines the advantages of different components to achieve both high mineralization efficiency and broad-spectrum degradation capability while maintaining stability
2Productivity
If large quantities of oxidant and catalyst are added to degrade dye wastewater, then the degradation process can proceed, but the treatment cost increases and the treatment effect is not significant
Solution Approach 1:
The patent optimizes the electronic state and surface properties of the Cu center to enhance its catalytic activity toward hydrogen peroxide activation. This allows the reaction to proceed efficiently at lower oxidant concentrations, reducing consumption while maintaining high degradation rates and achieving significant treatment effects
Solution Approach 2:
The catalyst is designed to maintain high activity over extended periods through its stable electron-poor Cu center structure, enabling the system to self-sustain efficient degradation without requiring continuous addition of large quantities of oxidant or catalyst replacement
3Productivity
If the traditional Fenton reaction mechanism is followed, then the reaction can proceed, but the utilization of hydrogen peroxide is very low and the reaction time is long
Solution Approach 1:
The patent fundamentally changes the reaction mechanism by creating an electron-poor Cu center that follows a different electron transfer pathway compared to traditional Fenton reactions. This new mechanism significantly improves hydrogen peroxide utilization efficiency and reduces reaction time by enabling more direct and efficient activation pathways
Solution Approach 2:
The patent replaces the traditional Fe-based Fenton mechanism with a Cu-based electron-poor center mechanism, substituting one chemical system with another that operates through different electronic pathways. This substitution achieves higher peroxide utilization and faster reaction kinetics
4Reliability
If precious metal catalysts are used in electro-Fenton treatment, then the catalyst can produce hydroxyl radicals to degrade organic pollutants, but the preparation cost is extremely high and the precious metal suffers heavy loss
Solution Approach 1:
The patent replaces expensive precious metals with a cost-effective Cu-based catalyst system. The electron-poor Cu center provides comparable or superior catalytic activity for hydroxyl radical generation while being significantly cheaper and more stable, preventing metal loss and reducing preparation costs
Solution Approach 2:
The patent changes the metallic composition parameter from precious metals to base metals (Cu, Al), fundamentally altering the cost structure while maintaining or enhancing catalytic performance through the unique electron-poor Cu center configuration
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 electron-poor Cu center catalyst achieves high catalytic efficiency and stability for organic pollutants like rhodamine B and bisphenol A, with improved mineralization and oxidant utilization under neutral conditions, overcoming the limitations of traditional Fenton-like catalysts.
Implementation Method 1
a hydroxyl radical (HO·) with super high oxidation capacity is produced through a reaction of Fe2+ with H2O2 to degrade the pollutant in water
Implementation Method 2
the traditional Fenton-like electron transfer mechanism
Implementation Method 3
followed by calcination, resulting in a (Bi, Cu)Al2O3 catalyst with a fluffy porous structure
Data Source
AI summary
A Fenton-like catalyst material with an electron-poor Cu center and a preparation method and use thereof are provided. The preparation method includes: step 1: dissolving bismuth nitrate pentahydrate in a nitric acid solution and diluting a resulting solution with deionized water to obtain a solution A; step 2: adding citric acid to the solution A and adjusting a pH of a resulting solution with ammonia water to obtain a solution B; step 3: dissolving aluminium isopropoxide (AIP), copper chloride dihydrate, and glucose in the solution B to obtain a suspension C; step 4: stirring the suspension C at a high temperature to allow evaporation until a solid D is completely precipitated; and step 5: subjecting the solid D to calcination in a muffle furnace to obtain the Fenton-like catalyst material. Under neutral conditions, the catalyst material exhibits a prominent removal effect for various toxic organic pollutants, especially for phenolic pollutants.