Silver-doped hydroxyapatite for formaldehyde determination by digital-image colorimetry

Pongkitdachoti, Uma; Unob, Fuangfa

doi:10.1039/d1ay02031e

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…The bands of 3d 3/2 and 3d 5/2 can be deconvoluted into two peaks. The peaks at 374.35 and 368.35 eV correspond to elemental silver, while the peaks at 373.9 and 367.9 eV, slightly lower in binding energy compared to those for elemental silver, indicate the presence of silver associated with oxygen in Ag 2 O . When sodium borohydride was added to the aqueous bath used to strip the AgNW films from filter papers, the oxygen content on the surface of the as-prepared AgNWs was significantly reduced (Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…It is worth noting that the use of Ag top electrodes in PSCs leads to lower efficiency compared to those with Au electrodes due to the smaller WF, lower reflectivity, and higher contact resistance. 55,56 However, PSCs with pristine AgNW electrodes exhibit very poor photovoltaic performance with a PCE of 4.25%, even lower than that of PSCs with the T-Ag electrode.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of a Water-Stripped Free-Standing Silver Nanowire Network as the Top Electrode for Perovskite Solar Cells

Liu,

Zuo,

Wang

et al. 2023

ACS Appl. Nano Mater.

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Recently, there has been significant interest in inorganic–organic hybrid perovskite solar cells (PSCs) due to their excellent photovoltaic performance. However, the fabrication of PSCs’ top metallic electrodes using thermal evaporation in a vacuum atmosphere significantly increases the manufacturing cost and restricts large-scale production. In this study, we propose a water separation method for the fabrication of free-standing films of silver nanowires (AgNWs) that can be easily stripped by using water and laminated onto perovskite devices as top electrodes in an ambient atmosphere. The electrodes composed of long AgNWs exhibit superior electrical properties compared to those composed of shorter ones. We have identified that the reduced performance of PSCs with AgNW electrodes is mainly attributed to the high oxide content on the surface of AgNWs and the insufficient contact between the AgNW networks and hole transport layers. To resolve these issues, we employed sodium borohydride reduction and polyethoxysiloxane incorporation techniques. Through these treatments, PSCs with AgNW electrodes achieved a power conversion efficiency of 15.64%. This performance surpasses that reported in the literature for PSCs with AgNW electrodes, demonstrating the effectiveness of our approach.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fabrication of a Water-Stripped Free-Standing Silver Nanowire Network as the Top Electrode for Perovskite Solar Cells

Liu,

Zuo,

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…Formaldehyde in an alkaline environment reduces silver ions, which leads to the precipitation of silver nanoparticles (AgNPs-HAP), which in turn changes the color of the sensor from whitish to pale yellow to dark brown depending on the concentration of formaldehyde. In order to more accurately determine the concentration of formaldehyde without analytical instruments, the ability to assess the color intensity of the sensor was developed thanks to the ImageJ software, which analyzes a photo of the sensor taken with a smartphone [ 72 ]. The next sensor, based on o-phenylenediamine (OPD) substrate on MnO 2 nanosheets, enabled the detection of formaldehyde in air, food samples, and beer using a fluorometric method.…”

Section: Electrochemical Sensors For the Detection Of Chemical Carcin...mentioning

confidence: 99%

Electrochemical and Optical Sensors for the Detection of Chemical Carcinogens Causing Leukemia

Kowalczyk

Zarychta

Lejman

et al. 2023

Sensors

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The incidence and mortality due to neoplastic diseases have shown an increasing tendency over the years. Based on GLOBOCAN 2020 published by the International Agency for Research on Cancer (IARC), leukemias are the thirteenth most commonly diagnosed cancer in the world, with 78.6% of leukemia cases diagnosed in countries with a very high or high Human Development Index (HDI). Carcinogenesis is a complex process initiated by a mutation in DNA that may be caused by chemical carcinogens present in polluted environments and human diet. The IARC has identified 122 human carcinogens, e.g., benzene, formaldehyde, pentachlorophenol, and 93 probable human carcinogens, e.g., styrene, diazinone. The aim of the following review is to present the chemical carcinogens involved or likely to be involved in the pathogenesis of leukemia and to summarize the latest reports on the possibility of detecting these compounds in the environment or food with the use of electrochemical sensors.

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“…Several research studied the use of Ag-doped HA for various medical devices; for example, they are used as a bone implant with an improved osteoconductivity [ 6 ], and as bioceramic layers with antifungal and antibacterial properties [ 7 , 8 ]. In biosensing application, Ag-doped HA was reported to be potential applied for trace-level formaldehyde detection [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Antibacterial Nanocomposite of Silver Nanoparticle-Doped Hydroxyapatite Utilizing Curcuma longa Leaf Extract and Land Snail (Achatina fulica) Shell Waste

Fatimah

Hidayat

Purwiandono

et al. 2022

JFB

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Preparation of green synthesized silver nanoparticle (AgNPs)-doped hydroxyapatite (Ag/HA) utilizing Curcuma longa leaf extract and land snail (Achatina fulica) shell waste was performed. Physicochemical characteristics and antibacterial activity of Ag/HA composite as a function of Ag content was studied. Instrumental analysis such as XRD, SEM-EDX, TEM, and XPS were employed to characterize the nanocomposites. The physicochemical study revealed the maintained porous structure of HA after Ag immobilization, and from TEM analyses, it was found that the distributed spherical particles are associated with the dispersed Ag and have a particle diameter of around 5–25 nm. Antibacterial activity of the nanocomposite was evaluated against Escherichia coli, Staphylococcus aureus, Kliebsiella pneumonia, and Streptococcus pyogenes. The results showed that the varied Ag content (1.0; 1.6; and 2.4% wt) influenced the nanoparticle distribution in the nanocomposite and enhanced the antibacterial feature.

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Silver-doped hydroxyapatite for formaldehyde determination by digital-image colorimetry

Abstract: Silver-hydroxyapatite material (Ag-HAP) was first proposed as material for trace-level formaldehyde detection based on Tollens’ reaction on the material surface. By using this Ag-HAP material, the chemical reduction caused by...

Cited by 6 publications

References 36 publications

Fabrication of a Water-Stripped Free-Standing Silver Nanowire Network as the Top Electrode for Perovskite Solar Cells

Fabrication of a Water-Stripped Free-Standing Silver Nanowire Network as the Top Electrode for Perovskite Solar Cells

Electrochemical and Optical Sensors for the Detection of Chemical Carcinogens Causing Leukemia

Green Synthesis of Antibacterial Nanocomposite of Silver Nanoparticle-Doped Hydroxyapatite Utilizing Curcuma longa Leaf Extract and Land Snail (Achatina fulica) Shell Waste

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