Coated Electrochemical Phosphate and pH Sensors for Coastal Monitoring
Solution Overview
Problem
Current nutrient analysis systems for coastal monitoring are bulky, complex, power-consuming, and expensive, limiting their use for broad-range coastal nutrient monitoring, and they fail to efficiently utilize phosphate fertilizers, leading to water contamination and eutrophication.
Innovation Solution
Development of electrochemical phosphate/pH sensors and systems that integrate cobalt (Co) and antimony (Sb) sensing windows on copper sensor pads, along with a reference electrode, to provide accurate and efficient monitoring of phosphate and pH levels in coastal environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical spectroscopy systems are used for nutrient analysis, then reliable data can be obtained, but the systems become bulky, complex, power-consuming, and expensive
Solution Approach 1:
The patent replaces optical spectroscopy systems with electrochemical sensors that measure phosphate and pH levels through electrochemical reactions. The Co-based phosphate sensor and Sb-based pH sensor detect nutrients through electrochemical potential differences, eliminating the need for bulky optical components while maintaining measurement reliability
Solution Approach 2:
The invention changes the measurement parameter from optical properties (absorption, reflection) to electrochemical parameters (potential, current). By measuring electrochemical potential differences between working and reference electrodes, the system achieves accurate nutrient detection with simpler, lower-power electronics
2Measurement precision
If optical spectroscopy systems are used for nutrient analysis, then reliable data can be obtained, but the systems consume excessive power
Solution Approach 1:
The patent replaces power-intensive optical spectroscopy with low-power electrochemical sensing. The electrochemical sensors require minimal power for measuring potential differences and driving small currents through the electrochemical reactions, enabling long-term deployment with battery or energy harvesting power sources
3Measurement precision
If optical spectroscopy systems are used for nutrient analysis, then reliable data can be obtained, but the systems are expensive
Solution Approach 1:
The patent replaces expensive optical components (light sources, spectrometers, detectors) with inexpensive electrochemical sensors. The Co-based and Sb-based electrodes can be manufactured using simple deposition techniques on affordable substrates, dramatically reducing system cost while maintaining measurement accuracy
Solution Approach 2:
The electrochemical sensors can be designed as disposable or easily replaceable components with simple Cu, Co, Sb, and PVC materials. This approach allows for cost-effective deployment across multiple monitoring locations, replacing expensive durable optical systems with affordable sensor arrays
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 integrated sensors enable real-time, remote monitoring of coastal nutrient levels, reducing fertilizer overuse, minimizing coastal contamination, and promoting sustainable ecosystems by providing direct feedback to farmers and enabling cost-effective, low-power nutrient detection systems.
Implementation Method 1
a phosphate (P) electrode formed on a surface of the substrate, the P electrode comprising a cobalt (Co) sensing window disposed on a first copper (Cu) sensor pad
Implementation Method 2
a pH electrode formed on the surface of the substrate and collocated with the P electrode, the pH electrode comprising an antimony (Sb) sensing window disposed on a second Cu sensor pad
Data Source
AI summary
Various examples are provided related to electrochemical phosphate/pH (P/pH) sensors, systems and related methods. In one example, a P/pH sensor includes a substrate and collocated phosphate (P) electrode and pH electrode formed on a surface of the substrate. The P electrode includes a cobalt (Co) sensing window disposed on a first copper (Cu) sensor pad; and the pH electrode includes an antimony (Sb) sensing window disposed on a second Cu sensor pad. The P/pH sensor can include a reference electrode, and may also include other sensor electrodes such as, e.g., a nitrate electrode.