Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia; College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin, 541004, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, 541004, China.
Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
Environ Res. 2024 Nov 15;261:119718. doi: 10.1016/j.envres.2024.119718. Epub 2024 Aug 2.
Devising of materials that afforded dual applicability in decontamination and pollutant detection were still a towering challenge owing to the increasing flux of discharge toxic contaminants over the years. Herein, the NiFeO nanoparticles-loaded on cube-like SrTiO (NiFeO/SrTiO) composite was fabricated by a two-step hydrothermal approach providing remarkable photocatalytic treatment and electrochemical sensing of noxious pollutants in wastewater. The material traits of the fabricated composite were scrutinized by myriad characterization approaches. The NiFeO/SrTiO hybrid material demonstrated high surface area of 19.81 m/g, adequate band gap energy of 2.75 eV, and prominent photoluminescence characteristics. In the presence of visible light, the NiFeO/SrTiO exhibited profound photocatalysis capability to eliminate sewage effluent-bearing chlortetracycline hydrochloride (CTCH) with 88.6% COD removal in 120 min, outperforming other pure materials. Meanwhile, the toxicity examination of effluent, the possible degradation pathway of CTCH and the proposed photocatalysis mechanism were also divulged. More importantly, the glassy carbon electrode was modified with synergized NiFeO/SrTiO (NiFeO/SrTiO-GCE) was adopted for the precise quantification of Hydrazine (Hz). The NiFeO/SrTiO-GCE obeyed first-order response for the Hz detection within the range of 1-10 mM: cyclic voltametric: limit of detection (LOD) of 0.119 μM with sensitivity of 18.9 μA μM cm, and linear sweep voltametric: LOD of 0.222 μM with a sensitivity of 12.05 μA μM cm. The stability and interference of modified electrode were also inspected. This work furnished valuable insights to yield a composite with the prominent S-scheme heterojunction system for quenching of charge carrier recombination and consequently contributing to the future realization into the domains of environmental clean-up and toxic chemical detection.
设计同时具有去污和污染物检测双重功能的材料仍然是一个巨大的挑战，因为多年来排放的有毒污染物不断增加。在此，通过两步水热法制备了负载在立方 SrTiO 上的 NiFeO 纳米粒子（NiFeO/SrTiO）复合材料，该复合材料在废水的有害污染物的光催化处理和电化学传感方面具有显著效果。通过多种表征方法对所制备复合材料的材料特性进行了研究。所制备的 NiFeO/SrTiO 复合材料具有高比表面积（19.81 m/g）、适中的能带隙能量（2.75 eV）和显著的光致发光特性。在可见光存在的情况下，NiFeO/SrTiO 表现出很强的光催化能力，在 120 min 内可以去除 88.6%的 COD，去除率很高，优于其他纯材料。同时，还对废水的毒性检测、CTCH 的可能降解途径和提出的光催化机制进行了研究。更重要的是，协同 NiFeO/SrTiO（NiFeO/SrTiO-GCE）修饰的玻碳电极用于肼（Hz）的精确定量。NiFeO/SrTiO-GCE 在 1-10 mM 范围内对 Hz 检测呈一级响应：循环伏安法：检测限（LOD）为 0.119 μM，灵敏度为 18.9 μA μM cm，线性扫描伏安法：LOD 为 0.222 μM，灵敏度为 12.05 μA μM cm。还对修饰电极的稳定性和干扰进行了研究。这项工作为制备具有优异 S 型异质结体系的复合材料提供了有价值的见解，该体系可抑制载流子复合，从而为未来在环境净化和有毒化学物质检测领域的实现提供了帮助。
