Synthesis of Fe3O4/CdWO4/carbon dots heterostructure with excellent visible light photocatalytic stability and activity for degradation of 4-nitrophenol and organic pollutant

Sobhani‐Nasab, Ali; Hoseinpour, Seyed Mostafa; Rahimi‐Nasrabadi, Mehdi; Pourmasoud, Saeid; Eghbali-Arani, Mohammad; Ahmadi, Farhad

doi:10.1007/s10854-021-07073-0

Cited by 9 publications

(1 citation statement)

References 55 publications

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“…Nanomaterials with superior physical, chemical, and mechanical properties are emerging, and this opens new opportunities for employing them as sensors for drug monitoring. As a result, electrochemical methods are frequently used for the analysis of food and pharmaceutical analytes due to their simplicity, low reagent toxicity, relative low cost, reliability, and low detection limit when compared to other analytical techniques. − Because they can be used for a variety of affordable and simple analyses, the development of electrochemical sensors based on modified electrodes has been taken into consideration. The development of sensitive and focused techniques based on nanomaterials is another of electrochemistry’s most alluring disciplines.…”

Section: Introductionmentioning

confidence: 99%

Paper-Based Analytical Device Based on Potentiometric Transduction for Sensitive Determination of Phenobarbital

Almehizia,

Naglah,

Alanazi

et al. 2023

ACS Omega

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In medicine, barbiturates are a class of depressive medications used as hypnotics, anticonvulsants, and anxiolytics. For the treatment of specific forms of epilepsy and seizures in young children in underdeveloped countries, the World Health Organization recommends phenobarbital (PBAR), a barbiturate drug. This review describes the fabrication and characterization of a paper-based analytical apparatus for phenobarbital detection that is straightforward, affordable, portable, and disposable. All of the solid-state ion-selective electrodes (ISEs) for PBAR as well as a Ag/AgCl reference electrode were constructed and optimized on a nonconductive paper substrate. Using carbon nanotube ink, the sensors were made to function as an ion-to-electron transducer and to make the paper conductive. A suitable polymeric membrane is drop-cast onto the surface of the carbon ink orifice. The pyrido-tetrapeptide and pyrido-hexapeptide derivatives, which were recently synthesized, functioned as distinct ionophores in the PBARmembrane sensor, enabling its detection. With a detection limit of 5.0 × 10 −7 M, the manufactured analytical device demonstrated a Nernstian response to PBAR anions in 50 mM phosphate buffer, pH 8.5, over a linear range of 1.0 × 10 −6 to 1.0 × 10 −3 M. The PBAR-based sensors showed quick (less than 5 s) response times for PBAR ion detection. The modified separate solution method was utilized to evaluate the selectivity pattern of these novel ionophores with respect to PBAR ions in comparison to other common anions. The analytical instrument that was exhibited on paper had good precision both within and between days. The suggested technology assisted in the detection of trace amounts of PBAR in real pharmaceutical samples. A comparison was made between the data acquired using the HPLC reference method and the information obtained by the recommended potentiometric approach. The described paper-based analytical device may be a good choice for point-of-care PBAR determination because it is cheap and easy to find and can self-pump (especially when combined with potentiometric detection).

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