A novel binary bismuth molybdate-perovskite type Strontium Niobate for efficient photocatalytic degradation of ciprofloxacin

Abstract

Background

One effective strategy and popular topic to preserve ecosystems and prevent water contamination is the direct use of green solar energy to transform organic contaminants in industrial effluent into hazardous substances. Treatment of waste from pharmaceuticals is challenging due to its complexity and wide range of pollutants.

Methods

This study used a unique hydrothermal method to create a Bi₂MoO₆-Sr₂Nb₂O₇ nanocatalyst. The photodegradation of Ciprofloxacin (CIP) in the presence of visible light was used to examine the photocatalytic performance of these materials. The obtained bare, composite photocatalysts were extensively characterized using a variety of physicochemical approaches. The structural and phase characteristics of the Bi₂MoO₆-Sr₂Nb₂O₇nanohybrids were identified by XRD and FT-IR spectra. The binding and distribution of the produced catalyst's rod- and plate-like structure were visible in FESEM and HR-TEM images. The presence of Bi₂MoO₆ decreased the composite's optical absorbance and bandgap energy, which was examined using UV-DRS spectroscopy. The band gap value is reduced and shifted to the visible area by adding Bi₂MoO₆.

Significant Findings

The photodegradation of CIP, the Bi₂MoO₆-Sr₂Nb₂O₇ catalyst demonstrated better photocatalytic activity; 96.3% of CIP was broken down under visible light. The Photoluminescence (PL) and transient photocurrent tests support the Bi₂MoO₆-Sr₂Nb₂O₇ catalyst's improved photo-induced charge separation efficiency. According to the results of the scavenger test, h⁺ and •O₂ were the key factors in the CIP degradation. Additionally, the Bi₂MoO₆-Sr₂Nb₂O₇ catalyst showed exceptional reusability and durability in four sequential cycles. The Bi₂MoO₆-Sr₂Nb₂O₇nanohybrids are expected to be used as photocatalysts for restoring the environment and converting light energy. This study presents an innovative method for creating a potent photocatalyst for pollutant degradation.