Nickel-doped cadmium coordination polymers (Ni@Cd-CP-n): A dual-function platform for antibiotic detection and dye photodegradation
Manish Kukreja, Astakala Anil Kumar, Nazrul Haq, Kafeel Ahmad Siddiqui
Abstract
The rising contamination of water sources by pharmaceutical and dye pollutants calls for innovative materials capable of simultaneous detection and degradation. In this study, a nickel-doped cadmium(II) coordination polymer (Ni@CP-2) was designed as a dual-function luminescent sensor and photocatalyst . Ni@CP-2 exhibited exceptional selectivity and sensitivity for sulfadiazine (SDZ) and nitrofurantoin (NFT) antibiotics, with Stern–Volmer quenching constants of 2.4 × 10 4 M⁻ 1 and 2.0 × 10 4 M⁻ 1 , and detection limits as low as 1.50 ppm and 1.41 ppm, respectively. Additionally, its photocatalytic efficiency under visible light resulted in 93.69 % degradation of Methylene Blue (MB) and 76.28 % of Crystal Violet (CV), while its undoped counterpart, CP-1, superior degradation efficiency for CV degradation (90.65 %). Stability and recyclability studies confirmed its structural integrity over multiple cycles, underscoring its long-term viability. This work establishes Ni@CP-2 as a promising multifunctional material for real-time antibiotic detection and efficient water purification , contributing to the advancement of smart coordination polymer-based systems for environmental remediation.