Analysis of 4-Nitrophenol in Wastewater
The novel electrochemical method for detecting para-nitrophenol (4-nitrophenol, 4-NP) is a well-known organic contaminant. However, that is frequently released into the environment and poses significant health risks to humans. Analysis of 4-Nitrophenol in Wastewater: To address this issue, a novel electrochemical sensor based on Ni@CuO/rGO/PtE has been developed for the sensitive and selective detection of 4-NP. XRD analysis indicated that the Ni@CuO/rGO nanocomposite had an excellent crystalline structure. And also that the average particle size was 47.3 nm. SEM and HR-TEM characterization showed that Ni and CuO were successfully added to the GO sheets. Additionally, EDX analysis confirmed the high purity and precise elemental composition of the synthesized nanocomposite.
4-Nitrophenol in Wastewater
The Ni\@CuO/rGO nanocomposite was uniformly deposited onto the surface of bare PtE via the drop-casting method. The fabricated Ni\@CuO/rGO/PtE sensor exhibited an excellent electrochemical response toward 4-NP under optimized experimental conditions, which included a scan rate of 110 mV/s, an acidic PBS electrolyte (pH 5), and a potential window of −0.3 to −1.2 V. However, a linear calibration curve was obtained over a wide concentration range of 0.09–105 μM. Furthermore, the calculated limits of detection (LOD) and quantification (LOQ) were 0.0054 μM and 0.018 μM, respectively, comparable to the most sensitive 4-NP sensors reported to date. The practical applicability of Ni@CuO/rGO/PtE is further validated using river and tap water samples. The sensor worked well and gave good recovery values for 4-NP, which showed that it was strong enough to be used in 4-nitrophenol analysis.
What is 4-nitrophenol?
4-Nitrophenol (4-NP), a notorious organic pollutant, poses significant health risks as it is widely released into the environment. Addressing this concern, a cutting-edge electrochemical sensor has been developed for the sensitive and selective screening of 4-NP. Because the sensor, based on Ni@CuO/rGO/PtE, exhibits promising results for real-world applications.
Material Characterization of 4-NitroPhenol
Extensive analysis, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HR-TEM), confirmed the excellent crystalline structure of the Ni@CuO/rGO nanocomposite. The nanocomposite, with an average size of 47.3 nm. And also successfully integrated Ni and CuO into graphene oxide (GO) sheets, as validated by energy-dispersive X-ray spectroscopy (EDX) analysis.
Sensor Fabrication and Optimization
The prepared nanocomposite was evenly spread over bare PtE using a drop-casting method. However, the fabricated sensor, Ni@CuO/rGO/PtE, exhibited outstanding responsiveness. The sensor exhibited responsiveness to 4-NP under optimized conditions, which included a scan rate of 110 mV/s, a phosphate-buffered saline (PBS) electrolyte at acidic pH 5, and a potential window between −0.3 and −1.2 V. Further, a broad linear concentration range from 0.09 to 105 μM resulted in a linear calibration curve for 4-NP.
Performance Metrics for 4-NitroPhenol
The proposed sensor showcased remarkable sensitivity. With a low limit of detection (LOD) and limit of quantification (LOQ) of 0.0054 μM and 0.018 μM, respectively—outperforming existing 4-NP sensors. The sensor’s analytical applicability is successfully tested on tap water and river water samples. This success is due to its ability to demonstrate reliability and efficiency in real-world scenarios.
Chemicals and Reagents for Analysis of 4-NitroPhenol
The study employed high-quality analytical-grade chemicals. The chemicals include graphite powder, NiCl₂, CuCl₂·5H₂O, KMnO₄, and NaNO₃; bisphenol-S (BPS); bisphenol-A (BPA); isoproturon (ISP); trichlorophenol (TCP); and pentachlorophenol (PCP). And also nitric acid (HNO₃), hydrogen peroxide (H₂O₂), sulfuric acid (H₂SO₄), hydrochloric acid (HCl), and 4-nitrophenol.
Conclusion of 4-NitroPhenol
In conclusion, the incorporation of Ni@CuO/rGO/PtE into electrochemical sensors demonstrates considerable potential for the detection and quantification of 4-NP in aqueous samples. ous samples. The modified PtE enhances sensitivity and selectivity and exhibits an excellent anti-interference profile. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are two more ways to show that the sensor is conductive and can hold a charge. This breakthrough offers a promising solution for environmental monitoring and pollution control.