Related Experiment Video
Updated: Jan 22, 2026

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
Published on: August 7, 2016
Preparation of the heterojunction catalyst N-doping carbon quantum dots/P25 and its visible light photocatalytic
Ning Xu1, Hongqin Huang1, Hao Ouyang1
1Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China.
Abstract:
N-doping carbon quantum dots were successfully loaded on P25 nanoparticles (denoted as N-CDs/P25) by facile hydrothermal process, and their morphology and chemical structure were systematically studied. The carrier of N-CDs can significantly broaden the photoresponse range of the P25 to the visible region, accelerate charge transportation and separation. Application of the N-CDs/P25 material for the photocatalytic decomposition of Rhodamine B (RhB) gave improved activity relative to P25. The best degradation activity obtained at 6mL N-CDs/P25 under visible light irradiation, which shows a 13.06 fold photocatalytic activity over P25. Radical trapping control experiment and Electron Paramagnetic Resonance (EPR) measurements have been applied to explore the photodegradation dynamic and visible-light driven degradation mechanism. This work provides new insights into the fabrication of N-doping carbon quantum dots/TiO2 composite and is promising to open new possibilities in the application of carbon-TiO2 composites as the photocatalysts in the environmental protection issues.
Related Concept Videos
Quantum Numbers
The Quantum-Mechanical Model of an Atom
The Carbon Cycle
Carbon Skeletons
Dot Product
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
Dot Product: Problem Solving
Identify the problem: Start by reading the problem and...

