4-nitrophenol optical sensing with N doped oxidized carbon dots

Bogireddy, Naveen Kumar Reddy; Cruz-Silva, Rodolfo; Valenzuela, Miguel A.; Agarwal, Vivechana

doi:10.1016/j.jhazmat.2019.121643

Cited by 76 publications

(37 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NCDs were prepared by hydrothermal method utilizing citric acid and urea as precursor materials (Bogireddy et al, 2019(Bogireddy et al, , 2020. Briefly, 0.20 g of citric acid and 0.38 g of urea were mixed in 50 ml of deionized water.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen-Doped Carbon Dots Induced Enhancement in CO2 Sensing Response From ZnO–Porous Silicon Hybrid Structure

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this study, we report a simple method for the fabrication of carbon dots sensitized zinc oxide-porous silicon (ZnO-pSi) hybrid structures for carbon dioxide (CO 2 ) sensing. A micro-/nanostructured layer of ZnO is formed over electrochemically prepared pSi substrates using a simple chemical precipitation method. The hybrid structure was structurally and optically characterized using scanning electron microscopy, X-ray diffraction, fluorescence, and cathodoluminescence after the incorporation of hydrothermally prepared nitrogen-doped carbon dots (NCDs) by drop casting. With respect to the control sample, although all the devices show an enhancement in the sensing response in the presence of NCDs, the optimal concentration shows an increase of ∼37% at an operating temperature of 200 • C and a response time <30 s. The increment in the CO 2 -sensing response, upon the addition of NCDs, is attributed to an increase in CO 2 -oxygen species reactions on the ZnO surface due to an increment in the free electron density at the metal-semiconductor-type junction of NCD clusters and ZnO micro-/nanorods. A significant increase in the sensing response (∼24%) at low operating temperature (100 • C) opens the possibility of developing very large-scale integrable (VLSI), low operational cost gas sensors with easy fabrication methods and low-cost materials.

show abstract

Section: Methodsmentioning

confidence: 99%

Nitrogen-Doped Carbon Dots Induced Enhancement in CO2 Sensing Response From ZnO–Porous Silicon Hybrid Structure

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among them, the foremost techniques for biomass-derived CDs have been the hydrothermal/solvothermal method and pyrolysis. Hydrothermal/solvothermal carbonization is predominantly used to synthesize CDs because of its low-cost, eco-friendly, and nontoxic processes ( Yang et al., 2017 ; Bogireddy et al., 2019 ; Latha et al., 2020 ; Bogireddy et al., 2020b ; Bogireddy et al., 2020a ; Anuar et al., 2021 ; Ge et al., 2021 ). In addition, water soluble carbon dots are generally made from hydrothermal and microwave techniques ( Kang et al., 2020 ).…”

Section: Synthesis Techniques For Obtaining Cdsmentioning

confidence: 99%

“…The crystallinity and graphitic nature of the carbon dots can be identified using X-ray diffractometer (XRD) ( Bogireddy et al., 2021a ). X-ray photoelectron (XPS) ( Reagen et al., 2021 ) and Fourier transform infrared spectroscopy (FT-IR) experiments have been performed to analyze carbon dots' chemical and structural composition ( Bogireddy et al., 2020a ). The chemical structure, phase, and molecular interactions of carbon dots have been analyzed from Raman Spectroscopy studies.…”

Section: Characterizationmentioning

confidence: 99%

“…The size, shape, and crystallinity of carbon dots have been obtained from high resolution-transmission electron microscope and selected area (electron) diffraction (SAED) images ( Bogireddy et al., 2020a ). Moreover, the topography of carbon dot materials has been obtained from atomic force microscopy (AFM) characterization ( Guo et al., 2015 ; Bhati et al., 2018 ).…”

Section: Characterizationmentioning

confidence: 99%

“…In this scenario, several nanotechnology based detection systems have been proposed recently ( Xu et al., 2020 ). Various nanomaterials, including carbon-based and metallic nanoparticles, have provided a potential solution for these existing environmental challenges ( de Marco et al., 2019 ; Latha et al., 2020 ; Bogireddy et al., 2020a ; Long et al., 2021 ). Among them, green synthesized carbon dots have attracted attention because of their sustainability, low cost, biocompatibility, and ease of use.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heavy metal ion detection using green precursor derived carbon dots

Torres¹,

Bogireddy

Kaur

et al. 2022

iScience

Self Cite

View full text Add to dashboard Cite

Recent Advances in the Applications of Carbon Nanostructures on Optical Sensing of Emerging Aquatic Pollutants

et al. 2022

View full text Add to dashboard Cite

In recent years, optical sensing based on nanomaterials has emerged as a prospective strategy for monitoring environmental pollution in water. In this context, carbon nanostructures have received increasing attention due to their unique optoelectronic and physiochemical properties. To this end, nanocarbon such as carbon nanotubes, graphene, and carbon dots have been used to develop proof‐of‐concept opto‐chemical sensors for emerging aquatic contaminants, including pesticides, bacterial pathogens, and pharmaceuticals residues. These optical sensors have attracted significant research interest in nanotechnology, material science, and the detection of aquatic pollutants. However, the practical application for detecting contaminants is still limited because of cost‐effectiveness, sensitivities, and selectivity toward the diverse pollutants. This review examines the current trends and challenges in designing and applying carbon nanostructure‐based optical sensors for detecting aquatic contaminants. Finally, a critical perspective on the field and future research directions is provided.

show abstract

4-nitrophenol optical sensing with N doped oxidized carbon dots

Cited by 76 publications

References 34 publications

Nitrogen-Doped Carbon Dots Induced Enhancement in CO2 Sensing Response From ZnO–Porous Silicon Hybrid Structure

Nitrogen-Doped Carbon Dots Induced Enhancement in CO2 Sensing Response From ZnO–Porous Silicon Hybrid Structure

Heavy metal ion detection using green precursor derived carbon dots

Recent Advances in the Applications of Carbon Nanostructures on Optical Sensing of Emerging Aquatic Pollutants

Contact Info

Product

Resources

About