Ratiometric Fluorescent Probe for Hydrogen Peroxide Detection
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Solution Overview
Problem
Current hydrogen peroxide detection methods using single fluorescent probes are prone to instability due to environmental factors and aggregation of quantum dots, leading to reduced sensitivity and stability.
Innovation Solution
A ratiometric fluorescent probe is developed, comprising a metal-organic framework (MOF) and molybdenum oxide quantum dots, which are supported on the surface of Co/Zn-MOFs, enhancing stability and sensitivity through synergy catalysis and preventing aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional single fluorescent probes are used for H2O2 detection, then the detection method is simple, but the sensing stability is easily affected by surrounding environmental factors and quantum dot aggregation
Solution Approach 1:
The patent employs a composite material system consisting of Co/Zn-MOFs as the structural framework and molybdenum oxide quantum dots as the fluorescent sensing component. This composite structure combines the advantages of MOFs (high surface area, tunable pores, structural stability) with quantum dots (fluorescence properties, catalytic activity), creating a probe that is more reliable and stable than traditional single-material probes while maintaining reasonable complexity
2Use of energy by moving object
If molybdenum oxide quantum dots are used without protection, then the probe has fluorescent activity, but the quantum dots are prone to aggregation which affects sensing performance and stability
Solution Approach 1:
The Co/Zn-MOFs provide a porous framework structure with high surface area and tunable pore sizes. These pores serve as protective cavities that accommodate molybdenum oxide quantum dots, preventing their aggregation while maintaining their fluorescent and catalytic properties. The porous structure allows reactants to access the quantum dots while physically separating them from each other
Solution Approach 2:
The Co/Zn-MOFs act as an intermediary carrier between the quantum dots and the surrounding environment. The MOF framework mediates the interaction by providing a stable support structure that protects quantum dots from direct contact and aggregation, while still allowing mass transport of substrates and products through its porous structure
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 probe provides improved sensitivity, stability, and faster detection with a hydrangea-like structure, overcoming the limitations of traditional methods by offering enhanced catalytic activity and resistance to interference.
Implementation Method 1
The MoOx QDs (nanoenzymes) and Co/Zn-MOFs prepared by the present disclosure have catalytic activity. The large specific surface area and porous structure of Co/Zn-MOFs can provide more binding sites for the contact between nanoenzymes and substrates. Moreover, Co/Zn-MOFs have high catalytic activity similar to natural enzymes. When nanoenzymes with fluorescent properties encounter Co/Zn-MOFs with similar catalytic activity, they will collide with a spark of 'synergy catalysis'
Implementation Method 2
the fluorescence spectroscopy method has the characteristics of high sensitivity, good selectivity, short response time and strong real-time monitoring ability. Performing fluorescence detection on the incubation material to obtain the fluorescence intensity
Data Source
AI summary
The present disclosure provides a ratiometric fluorescent probe, a preparation method thereof, and an application in detection of hydrogen peroxide. In the present disclosure, MoOx QDs (nanoenzymes) and Co/Zn-MOFs both have catalytic activity, and the large specific surface area and porous structure of Co/Zn-MOFs can provide more binding sites for the contact between nanoenzymes and substrates. Moreover, Co/Zn-MOFs have high catalytic activity similar to natural enzymes. When nanoenzymes with fluorescent properties encounter Co/Zn-MOFs with similar catalytic activity, they will collide with a spark of “synergy catalysis”, and the fusion of the two plays a role of synergy catalysis; in addition, the uniform cavity of Co/Zn-MOFs can provide “hosts” for nanoenzymes, and Co/Zn-MOFs provide “anchors” for MoOx QDs, avoiding the aggregation of MoOx QDs and enhancing the stability of the probe.