Next Article in Journal
Congestion Control in CoAP Observe Group Communication
Next Article in Special Issue
Functionalized Electrospun Nanofibers as Colorimetric Sensory Probe for Mercury Detection: A Review
Previous Article in Journal
A Hybrid Two-Axis Force Sensor for the Mesoscopic Structural Superlubricity Studies
Open AccessArticle

A Unique Interactive Nanostructure Knitting based Passive Sampler Adsorbent for Monitoring of Hg2+ in Water

1
Institute “Jožef Stefan”, Department of Environmental Sciences, Jamova 39, 1000 Ljubljana, Slovenia
2
National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
3
Jožef Stefan International Postgraduate School (IPS), Jamova 39, 1000 Ljubljana, Slovenia
4
Institute “Jožef Stefan”, Department of Surface Engineering, Jamova 39, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(15), 3432; https://doi.org/10.3390/s19153432
Received: 5 July 2019 / Revised: 31 July 2019 / Accepted: 1 August 2019 / Published: 5 August 2019
(This article belongs to the Special Issue Global Mercury Assessment Sensing Strategies)
This work reports the development of ultralight interwoven ultrathin graphitic carbon nitride (g-CN) nanosheets for use as a potential adsorbent in a passive sampler (PAS) designed to bind Hg2+ ions. The g-CN nanosheets were prepared from bulk g-CN synthesised via a modified high-temperature short-time (HTST) polycondensation process. The crystal structure, surface functional groups, and morphology of the g-CN nanosheets were characterised using a battery of instruments. The results confirmed that the as-synthesized product is composed of few-layered nanosheets. The adsorption efficiency of g-CN for binding Hg2+ (100 ng mL−1) in sea, river, rain, and Milli-Q quality water was 89%, 93%, 97%, and 100%, respectively, at natural pH. Interference studies found that the cations tested (Co2+, Ca2+, Zn2+, Fe2+, Mn2+, Ni2+, Bi3+, Na+, and K+) had no significant effect on the adsorption efficiency of Hg2+. Different parameters were optimised to improve the performance of g-CN such as pH, contact time, and amount of adsorbent. Optimum conditions were pH 7, 120 min incubation time and 10 mg of nanosheets. The yield of nanosheets was 72.5%, which is higher compared to other polycondensation processes using different monomers. The g-CN sheets could also be regenerated up to eight times with only a 20% loss in binding efficiency. Overall, nano-knitted g-CN is a promising low-cost green adsorbent for use in passive samplers or as a transducing material in sensor applications. View Full-Text
Keywords: nanosheets; adsorption; passive sampler; mercury; analysis nanosheets; adsorption; passive sampler; mercury; analysis
Show Figures

Figure 1

MDPI and ACS Style

Chouhan, R.S.; Žitko, G.; Fajon, V.; Živković, I.; Pavlin, M.; Berisha, S.; Jerman, I.; Vesel, A.; Horvat, M. A Unique Interactive Nanostructure Knitting based Passive Sampler Adsorbent for Monitoring of Hg2+ in Water. Sensors 2019, 19, 3432. https://doi.org/10.3390/s19153432

AMA Style

Chouhan RS, Žitko G, Fajon V, Živković I, Pavlin M, Berisha S, Jerman I, Vesel A, Horvat M. A Unique Interactive Nanostructure Knitting based Passive Sampler Adsorbent for Monitoring of Hg2+ in Water. Sensors. 2019; 19(15):3432. https://doi.org/10.3390/s19153432

Chicago/Turabian Style

Chouhan, Raghuraj S.; Žitko, Gregor; Fajon, Vesna; Živković, Igor; Pavlin, Majda; Berisha, Sabina; Jerman, Ivan; Vesel, Alenka; Horvat, Milena. 2019. "A Unique Interactive Nanostructure Knitting based Passive Sampler Adsorbent for Monitoring of Hg2+ in Water" Sensors 19, no. 15: 3432. https://doi.org/10.3390/s19153432

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop