Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Enhanced photocatalytic activity by Cu2O nanoparticles integrated H2Ti3O7 nanotubes

21.06.2017

Why do we construct nanocomposite for the photocatalytic oxidation desulfurization?

Current hydrodesulfurization (HDS) technology is hard to remove thiols and refractory thiophenic compounds to a minimum in fuels. Moreover, the HDS technology requires severe operation conditions, along with other disadvantages in deep desulfurization.


The suggested mechanism of photocatalytic oxidization of EM over Cu2O@H2Ti3O7 nanocomposite under sunlight irradiation. Under the sunlight irradiation, photo-generated electrons (e?) of nanocomposite aggregated on nanotubes, and holes (h?) aggregated on Cu2O nanoparticles, which will reduce the bandgap energy and prolong the effective separation of photo-induced electron-hole pairs, enhance eventually the photocatalytic activity. It causes a large number of the hydroxy radical groups (·OH) generated on nanocomposite, which will effectively oxidize EM due to the synergistic effect between them to form heterojunction structure. Therefore, nanocomposite exhibits the excellent photocatalytic performance.

Credit: NANO Journal

Therefore, considerable attention has been paid to non-HDS techniques, such as adsorption, biodesulfurization and photocatalytic oxidation, etc. Among them, the photocatalytic oxidation desulfurization is the most ideal "green chemistry" technology for deep desulfurization with mild operating conditions. Some researchers have reported nanocomposite as an effective photocatalytic functional material than the host alone, such as Nb6O17@Fe2O3, Cu2O@TiO2 nanotube arrays, etc.

Titanate nanotubes attracted a wide attention for the high photocatalytic activity under UV light irradiation. However, titanates have a relatively wide band gap and is utilize only under UV light, thus the photocatalytic activity is limitation.

Moreover, when Cu2O is used as a photocatalyst alone, it is a limitation what the electrons and holes excited by light cannot be transferred efficiently and are easy to recombine. Some team of researchers introduced an innovative strategy by compositing Cu2O nanoparticles with titanate nanotubes, which will result in the stronger visible spectral response and wider absorbance.

This technology provides a new approach to reduce the bandgap energy and prolong the separation of photo-generated electron-hole pairs, which resulted in better photocatalytic activities for photodegradation of organic pollutants more thoroughly.

The most significant aspect of my study: Composting Cu2O nanoparticles with H2Ti3O7 nanotubes as an effective photocatalyst applied in desulfurization, it was rarely reported that the construction and desulfurization application of this functional materials before we research. At first, the photocatalytic oxidation desulfurization is the most ideal "green chemistry" technology for deep desulfurization with mild operating conditions than the current HDS technology.

Next, We have synthesized the trititanate nanotubes. Previous researches demonstrated that some layered titanates were better photocatalysts, and the corresponding nanosheets and nanotubes even showed much higher photocatalytic activities than the original layered compound. In addition, we have constructed the Cu2O@H2Ti3O7 nanocomposite, the mesoporous nanoscroll composites possess obviously higher photocatalytic activities than guest oxide nanoparticles or host layered materials alone.

The researches suggest that layered materials doped with guest nanoparticles can not only reduce the bandgap, but also inhibit the recombination of photoinduced electron-hole pairs. Therefore, we employ Cu2O nanoparticles integrated H2T3O7 nanotubes by a facile hydrothermal method, it shows that nanocomposite exhibits the excellent photocatalytic performance due to the stronger visible spectral response and wider absorbance, this research that could help develop new energy resources (solar energy) and oxidize organic pollutants for protection of the environment.

###

This work was supported by the National Natural Science Foundation of China (No. 21271008, 21071004).

Addition co-authors of the paper are Lei Xu, Jie He, Lifang Hu, Bin Wang and Liangguo Da, they all come from Anhui University of Science and Technology.

Corresponding author for this study is Jie He, jhe@aust.edu.cn.

This research (http://www.worldscientific.com/doi/abs/10.1142/S1793292017500758) can be found in the NANO journal.

Jason Lim | EurekAlert!

More articles from Life Sciences:

nachricht The “Holy Grail” of peptide chemistry: Making peptide active agents available orally
21.02.2018 | Technische Universität München

nachricht First line of defence against influenza further decoded
21.02.2018 | Helmholtz-Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Atomic structure of ultrasound material not what anyone expected

21.02.2018 | Materials Sciences

'Icebreaker' protein opens genome for t cell development, Penn researchers find

21.02.2018 | Health and Medicine

MEMS chips get metatlenses

21.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>