Insights into the roles of organic coating in tuning the defect chemistry of monodisperse TiO(2) nanocrystals for tailored properties

Physical Chemistry Chemical Physics : PCCP
Liping LiWanbiao Hu

Abstract

This work initiated a systematic study on the chemical nature of organic coating for monodispersed nanoparticles and its impact on the defect chemistry and the relevant properties. Monodispersed TiO(2) nanoparticles were prepared by a nonhydrolytic sol-gel reaction, which showed features of uniform diameter distribution around 5.2 nm, high crystallinity, and single anatase structure. These nanoparticles were terminated by oleate-related molecules, which stabilized the surface oxygen vacancies and further generated intense photoluminescence and co-existence of ferromagnetism and diamagnetism. After removal of organic coating, the nanoparticles became highly aggregated with no apparent changes in particle size, while the oxygen vacancy concentration was significantly reduced, as followed by energy position shift towards the deeper-levels which promoted the separation of photogenerated electrons and holes for improved photocatalytic activity. The results reported here are fundamentally important, which may be extended to comprehend the size-dependent defects and structure-property correlations of monodispersed nanoparticles for applications.

References

Nov 20, 2003·Journal of the American Chemical Society·P Davide CozzoliHorst Weller
Sep 2, 2005·Nature·Xun WangYadong Li
Nov 18, 2005·Journal of Colloid and Interface Science·T V Vijaya KumarG Bhaskar Raju
Aug 11, 2006·The Journal of Physical Chemistry. B·Bing Tan, Yiying Wu
Dec 15, 2006·The Journal of Physical Chemistry. B·Nadica D AbazovićJovan M Nedeljković
Apr 10, 2007·Journal of Colloid and Interface Science·Jinkai ZhouX S Zhao
Jul 31, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Fritz J KnorrJeanne L McHale
Mar 29, 2008·Science·David J NorrisSteven C Erwin
Dec 19, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Jianchun WangXuxu Wang
Aug 27, 2009·Journal of the American Chemical Society·Jin WangNianqiang Wu

❮ Previous
Next ❯

Citations

Aug 2, 2013·Physical Chemistry Chemical Physics : PCCP·Xuemin LiTao He
Mar 27, 2012·Journal of the American Chemical Society·Thomas R GordonChristopher B Murray
Apr 26, 2019·ACS Applied Materials & Interfaces·Jianfeng ZhuZhengming Sun

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.