حذف تتراسايكلين از آب آلوده توسط فوتوراكتور سلول سوختي با نانو كامپوزيت چند جزئي Fe2WO6/g-C3N4/ZIF-67 بر پايه شيشه رسانا و اكسيد مس بر پايه توري مسي

Removal of Tetracycline from polluted water by fuel cell photoreactor with multicomponent nanocomposite Fe2WO6/g-C3N4/ZIF-67 based on conductive glass an‎d copper oxide supported on copper mesh

مهندسي شيمي

In this study, the optimized binary composite Fe₂WO₆(30%)/g‑C₃N₄(70%) an‎d the optimized ternary composite Fe₂WO₆(27%)/g‑C₃N₄(63%)/Bimetallic ZIF(Co/Zn)(10%) (denoted as FCZ10%) were synthesized via a hydrothermal method an‎d characterized using XRD, UV‑Vis DRS, FTIR, PL, BET, SEM, EDX, TEM, VSM, an‎d TGA analyses. The optimized ternary composite, with a ban‎d gap energy of 1.84 eV, demonstrated an enhanced photocatalytic performance for tetracycline degradation. The influences of operational parameters such as pH, pollutant concentration, photocatalyst loading, an‎d light intensity were investigated in a batch slurry reactor. The optimal operating conditions were determined as a tetracycline concentration of 20 mg L⁻¹, photocatalyst dosage of 0.3 g L⁻¹, pH = 7, an‎d light intensity of 600 W m⁻². Kinetic an‎d isotherm studies revealed that the adsorption kinetics followed a pseudo‑first‑order model, the adsorption isotherm fitted the Langmuir model, an‎d the degradation kinetics also followed a pseudo‑first‑order equation. Under optimal slurry-phase conditions, the FCZ10% photocatalyst achieved 87% COD an‎d 79% TOC removal after 120 minutes. Subsequently, following the successful dro‎p‑casting deposition of this photocatalyst on a conductive glass substrate, the optimized pH obtained from slurry experiments was applied to the continuous‑flow mode. The effects of light intensity, pollutant concentration, an‎d fluid flow rate were investigated in a photofuel cell reactor. Under the optimized conditions, tetracycline concentration of 20 mg L⁻¹, light intensity of 300 W m⁻², an‎d flow rate of 0.5 mL min⁻¹, a tetracycline removal efficiency of 96.3% an‎d a photocurrent density of 167 µA cm⁻² were achieved.The maximum power density reached 58 µW cm⁻², with a short‑circuit current of 169 µA cm⁻² an‎d an open‑circuit voltage of 1.08 V. Stability an‎d recyclability tests revealed that the photocatalyst maintained satisfactory performance for up to five consecutive cycles in the slurry system an‎d remained stable for 22 hours in the immobilized (fixed‑bed) configuration. Furthermore, ICP‑MS analysis confirmed that the synthesized photocatalyst is environmentally benign, classifying it as a green photocatalyst.

5

169088