Borate Nanocomposite Sol-Gel Synthesis for Pollutant Immobilization
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Solution Overview
Problem
Conventional synthesis methods for nanocomposites, such as borate-based compounds, face challenges including high processing costs, labor-intensive procedures, limited control over particle morphology and composition, inhomogeneous particle distribution, and environmental impact, hindering their commercial viability and scalability.
Innovation Solution
A method for producing a particulate nanocomposite material comprising orthorhombic magnesium iron borate, orthorhombic calcium diborate, and monoclinic magnesium diborate phases, using a sol-gel process with controlled addition of chelating agents and polyols, followed by calcination, to achieve uniform particle dispersion and precise control over nanoscale properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional synthesis methods (co-precipitation, hydrothermal processes) are used, then nanocomposite materials can be produced, but the processing costs are high and the procedures are labor-intensive
Solution Approach 1:
The patent changes the synthesis parameters by using a sol-gel process with controlled pH and temperature conditions, replacing conventional high-energy methods. This allows lower processing temperatures and simpler procedures while maintaining product quality, directly addressing the contradiction between ease of manufacture and productivity
Solution Approach 2:
The patent introduces a sol-gel intermediary process that facilitates nanocomposite formation through controlled hydrolysis and condensation reactions. This intermediary mechanism enables gradual material formation with better control over composition and morphology, reducing both labor intensity and processing costs while improving production efficiency
2Manufacturing precision
If conventional synthesis methods are used, then nanocomposites can be produced, but control over particle morphology and composition is limited
Solution Approach 1:
The patent applies preliminary action by pre-forming a sol gel structure before final nanocomposite formation. The chelating agents and polyols are added in advance to control nucleation and growth patterns, enabling precise morphology control while managing process complexity through staged addition
Solution Approach 2:
The patent implements local quality control by using different chelating agents and polyols at specific stages of the synthesis process. This allows different regions of the nanocomposite to develop specific properties (core-shell structures, surface modifications) while maintaining overall compositional control
3Stability of the object's composition
If conventional synthesis methods are used, then nanocomposites can be produced, but particle distribution is inhomogeneous
Solution Approach 1:
The patent ensures continuity of useful action by maintaining controlled reaction conditions throughout the entire synthesis process. The sol-gel method provides continuous material formation with uniform distribution, and the controlled addition of reagents ensures consistent composition regardless of scale, enabling both homogeneity and scalability
4Reliability
If energy-intensive reactions with stringent temperature and pressure conditions are used, then borate-based nanocomposites can be synthesized, but processing costs increase and environmental impact worsens
Solution Approach 1:
The patent changes the energy parameters by conducting the synthesis at lower temperatures and atmospheric pressure compared to conventional methods. The sol-gel process enables crystallization at reduced thermal energy input while maintaining reliable crystallinity control through pH and composition management
Solution Approach 2:
The patent converts the typically harmful effect of uncontrolled rapid crystallization into a benefit by using the sol-gel transition as a controlled intermediary step. This converts what would be a harmful sudden phase change into a beneficial gradual process that releases energy more controllably and produces more uniform structures
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 method results in a high-crystallinity nanocomposite with uniform composition and controlled particle size, enhancing its mechanical strength and functional performance, suitable for immobilizing inorganic contaminants and degrading organic pollutants.
Implementation Method 1
A method for producing a particulate nanocomposite material comprising orthorhombic magnesium iron borate, orthorhombic calcium diborate, and monoclinic magnesium diborate phases, using a sol-gel process
Implementation Method 2
The method further comprises: forming an aqueous mixture by adding an aqueous solution of a chelating agent to an aqueous solution of a magnesium salt, a calcium salt, an iron salt and boric acid
Implementation Method 3
heating the gel under stirring at a temperature of from about 150° C. to about 300° C. for a sufficient duration to form a dry powder
Implementation Method 4
calcining the dry powder at a temperature of from about 600° C. to about 800° C. to form the nanocomposite material
Implementation Method 5
forming an aqueous mixture by adding an aqueous solution of a chelating agent to an aqueous solution of a magnesium salt, a calcium salt, an iron salt and boric acid
Data Source
AI summary
A particulate nanocomposite material comprising, as determined by X-ray diffraction (XRD): elemental carbon (C); an orthorhombic magnesium iron borate (MgFe(BO3)O) crystalline phase; an orthorhombic calcium diborate (CaB2O4) crystalline phase; and, a monoclinic magnesium diborate (Mg2B2O5) crystalline phase. The nanocomposite is further characterized in that, based on the total number of atoms in the particulate nanocomposite material and as determined by energy dispersive X-ray spectroscopy (EDX), the atomic concentration of carbon (C) is from about 0.1 atomic percent (atom %) to 5 atom %, the atomic concentration of calcium (Ca) is from about 5 to 15 atom %, the atomic concentration of boron (B) is from about 1 to 10 atom %, the atomic concentration of iron (Fe) is from about 5 to 15 atom %, and the atomic concentration of magnesium (Mg) is from about 5 to 15 atom %.