这里是 Fe Fe Fe Fe
Minoo Khodamorady1, Kiumars Bahrami1,2
1Department of Organic Chemistry, Faculty of Chemistry, Razi University, Kermanshah 67144-14971, Iran.
Heliyon
|June 5, 2023
概括
新的磁性纳米复合材料在紫外线和可见光下有效地去除染料和废水. 最好的光催化剂MNPs@BNPs@ZnO-ZnS (0.75:0.25),表现出优异的性能和减少的电子孔重组.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- 开发高效的光催化剂对于环境修复至关重要.
- 磁纳米复合材料为污染物降解提供可调节的特性.
- 基于氧化和硫化的材料在光催化中表现有前途.
研究的目的:
- 合成新的磁性纳米复合材料 (MNPs@BNPs@ZnO-ZnS) 具有不同的ZnO/ZnS摩尔比.
- 评估它们在紫外线和可见光下去除甲基蓝 (MB),甲基 (MO) 和真实污水的光催化效率.
- 确定最佳的纳米复合材料组成,并了解其性能特征.
主要方法:
- 合成具有不同ZnO/ZnS摩尔比的磁性纳米复合材料.
- 在紫外线和可见光下使用MB,MO和真实废水进行光催化降解实验.
- 使用传输电子显微镜 (TEM),动态光散射 (DLS) 采用泽塔电位和光发光 (PL) 光谱学进行表征.
- 动力学研究以确定降解速率常数.
主要成果:
- 最好的光催化剂MNPs@BNPs@ZnO-ZnS (ZnO/ZnS:0.75:0.25) 显示出最高的效率,特别是在紫外线下.
- 合成的纳米复合材料颗粒大小在10-30nm之间.
- PL分析表明,在最佳光催化剂中,电子孔再组合减少.
- 移除MO和MB的速率常数分别为0.0186分钟-1和0.0171分钟-1.
- 在大多数pH值下,光催化剂表现出负表面电荷.
结论:
- 新型MNPs@BNPs@ZnO-ZnS纳米复合物 (0.75:0.25比) 是一种高效的光催化剂,用于降解有机染料和废水.
- 该材料的效率归因于电荷载体重组减少和最佳组成.
- 使用廉价,耐用,高效的紫外线和可见光灯使其成为废水处理的实用解决方案.
相关概念视频
02:07FISH - Fluorescent In-situ Hybridization
20.9K
Fluorescence in situ hybridization, or FISH, was developed in the early 1980s and has quickly become one of the most widely used techniques in cytogenetics. Labeled probes are used to bind complementary DNA or RNA sequences on a chromosome or in a region within a cell. Earlier, the probes could only be obtained by cloning or reverse transcription of a DNA template. Currently, the probe oligonucleotides can be synthesized synthetically. Additionally, with the advancement of optical techniques,...
20.9K
01:21Free Energy
48.3K
Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break...
48.3K
01:06Force
12.7K
Forces affect every moment of our life. Our bodies are held to the Earth by force, and they are held together by the forces of charged particles. When we open a door, walk down a street, lift a fork, or touch a baby's face, we are applying force. Our body's atoms are held together by electrical forces, and the core of an atom, called the nucleus, is held together by the strongest force known to us—nuclear force.
The study of motion is called kinematics, but kinematics only...
The study of motion is called kinematics, but kinematics only...
12.7K
01:22Motional Emf
3.3K
Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
3.3K
01:01Tongue
1.1K
The human tongue is a fascinating and complex organ, responsible for various essential functions such as swallowing, speech, and taste. It is also subject to various conditions and diseases. In this article, we delve into the anatomy of the tongue, its roles, and some common conditions that can affect it.
Anatomical Position in the Oral Cavity
The tongue is located within the oral cavity, also known as the mouth. It is attached to the floor of the mouth by a fold of mucous membrane called the...
Anatomical Position in the Oral Cavity
The tongue is located within the oral cavity, also known as the mouth. It is attached to the floor of the mouth by a fold of mucous membrane called the...
1.1K
02:36Electromotive Force
26.8K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one...
26.8K