由 Spinacia oleracea 合成的布鲁基特相 TiO2:结构,光催化活性和光增强的抗菌疗效
Fatemeh Sheikh Ansari1, Sara Daneshjou2
1Department of Nanobiotechnology, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran.
Discover nano
|February 19, 2026
概括
绿色合成的brookite二氧化纳米颗粒显示出有前途的光催化和抗菌特性. 这些环保的纳米颗粒有效降解甲基蓝,抑制细菌生长,在光照射下增强活性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 绿色化学 绿色化学
背景情况:
- 二氧化 (TiO2) 是一种多用途的半导体,在光催化和抗菌治疗中具有应用.
- 为TiO2纳米颗粒开发具有成本效益和环保的合成方法至关重要.
研究的目的:
- 通过绿色化学方法合成布鲁基特相TiO2纳米粒子.
- 为了评估合成的纳米颗粒的光催化活性,用于染料降解.
- 为了评估抗菌效果对抗格兰阴性和格兰阳性细菌.
主要方法:
- 使用Spinacia oleracea树叶提取物和氧硫酸 (TiOSO4) 的绿色合成.
- 使用X射线衍射 (XRD),场辐射扫描电子显微镜与能量散射X射线光谱 (FESEM-EDX),里埃转换红外光谱 (FTIR) 和UV-Vis/扩散反射光谱 (DRS) 的表征.
- 在紫外线和可见光下甲蓝的光催化降解.
- 抗菌检测测定最低抑制度 (MICs) 在黑暗和蓝光照射下.
主要成果:
- 球形布鲁基TiO2纳米粒子 (5-12nm) 已成功合成.
- 在3小时 (紫外线) 和5小时 (可见光) 中达到约50%的甲蓝降解.
- 在光照照射下有效抑制大肠杆菌 (大肠杆菌) 和黄金杆菌 (黄金杆菌),MIC较低,表明抗菌活性增强.
结论:
- 绿色合成途径提供了一种生产brookite TiO2纳米颗粒的高效方法.
- 合成的纳米颗粒具有显著的光催化和光增强抗菌特性.
- 这些发现凸显了这些环保纳米颗粒在环境修复和抗菌应用方面的潜力.
更多相关视频
09:09A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration
Published on: March 29, 2019
7.0K
08:30A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
Published on: October 6, 2022
2.4K
相关概念视频
Photosystem II
59.9K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
59.9K
Photosystem I
52.8K
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
52.8K
Phase I Oxidative Reactions: Overview
1.0K
Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
1.0K
Oxygenic Photosynthesis
994
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
994
