Trichloroethylene sensing in water based on SERS with multifunctional Au/TiO2 core-shell nanocomposites

The Analyst
Wen RenJoseph M K Irudayaraj

Abstract

Herein we report on a rapid and highly sensitive scheme to detect trichloroethylene (TCE), an environmental contaminant, by surface enhanced Raman scattering (SERS) with multifunctional Au/TiO2 core-shell nanocomposites as SERS substrates. A facile approach to fabricate TiO2 shell around gold core nanocomposites is proposed as sensors for TCE detection by SERS. During detection, TCE was first oxidized due to the photocatalytic activity of the TiO2 shell and the increase in SERS intensity due to the product of TCE photooxidation can be used to determine the concentration of TCE. It should be noted that the SERS of the Raman label, 4-mercaptopyridine (4-MPy) modified onto the gold nanoparticle (GNP) core is in proportion to the product of TCE photooxidation. After optimizing the sample pH, enrichment of the analyte, and the UV exposure time, the methodology developed accomplishes an excellent limit of detection (LOD) (0.038 μM, i.e.∼5 ppb) for TCE in water. Our unique approach based on the synthesized SERS composite to detect TCE, a chlorinated environmental contaminant directly in water could pave the way for the development of a multifunctional nanosensor platform to monitor TCE and the catalytic reactions in a multiplex format.

References

Jun 14, 2000·Critical Reviews in Toxicology·T Brüning, H M Bolt
Apr 15, 2004·Journal of the American Chemical Society·Vaidyanathan SubramanianPrashant V Kamat
Mar 18, 2005·Journal of the American Chemical Society·Tsutomu Hirakawa, Prashant V Kamat
May 17, 2005·Nature Materials·Matt LawPeidong Yang
May 19, 2005·Journal of the American Chemical Society·Yang Tian, Tetsu Tatsuma
Jun 14, 2005·Angewandte Chemie·Jing Li, Hua Chun Zeng
Apr 27, 2007·Analytical Chemistry·Wolfgang HaissDavid G Fernig
May 1, 2007·Analytical Chemistry·Lan SunJoseph Irudayaraj
Apr 16, 2009·Applied Spectroscopy·K L Nowak-Lovato, K D Rector
Sep 14, 2010·Chemical Reviews·Anders HagfeldtHenrik Pettersson
Nov 6, 2010·Analytical and Bioanalytical Chemistry·Mouna HnaienNicole Jaffrezic-Renault
Mar 10, 2011·Chemical Communications : Chem Comm·Yuling Wang, Joseph Irudayaraj
Jan 1, 2014·Accounts of Chemical Research·Isabel X GreenJohn T Yates

❮ 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.