Photoresponsive CoNi-MOF@CoO2@WSe2 hybrid: A dual-function platform for high-performance photo-hybrid supercapacitors and zearalenone sensing

In this study, we develop photoresponsive heterogeneous Cobalt-nickel-based MOFs (CoNi-MOFs), cobalt dioxide (CoO 2 ), and tungsten diselenide (WSe 2 ) hybrid device to improve the performance of photo-assisted supercapacitors. We measure the electrochemical characteristics of photo-assisted hybrid electrodes under both dark and light conditions using cyclic voltammetry and galvanostatic charge–discharge. In dark, a high specific capacity (Qs) is estimated at 970 C/g, increased to 1230 C/g under the light in three-electrode assemblies. An FTO/CoNi-MOF@CoO 2 @WSe 2 /Electrolytes//PANI@AC/GS photo hybrid supercapacitors device is designed and measured in both conditions. The hybrid device showed Qs of 325 C/g in light conditions with energy and power densities of 72 Wh/kg and 827 W/kg, respectively. Even after undergoing 6000 cycles, it exhibited a capacity retention (CR) rate of 91 % and columbic efficiency of 93 %, indicating its exceptional durability as an energy storage device. Besides, the composite devices detect zearalenone in agricultural food samples. The optimal signal for Zearalenone in phosphate buffer solution was observed at pH 7.0, yielding the highest detected response. The sensor demonstrated a broad linear dynamic range of 1–300 μM and an impressively low detection limit of 0.5 nM for Zearalenone concentration. The CoNi-MOF@CoO 2 @WSe 2 nanocomposite has a remarkable sensitivity value of 110.72 mA/cm −2 /mM −1 and response against zearalenone in light. The findings also suggest that the capacitance of the CoNi-MOF@CoO 2 @WSe 2 electrode may increase at an optimal temperature. This likely occurs due to enhanced ion diffusion and charge transfer kinetics, which can improve the energy storage device’s efficiency and aid in identifying the cancerous part of the body.