Novel halochromic hydrazonal chromophore immobilized into rice-straw based cellulose aerogel for vapochromic detection of ammonia

Al‐Qahtani, Salhah D.; Snari, Razan M.; Al‐Ahmed, Zehbah A.; Hossan, Aisha; Munshi, Alaa M.; Alfi, Alia Abdulaziz; El‐Metwaly, Nashwa M.

doi:10.1016/j.molliq.2022.118539

Cited by 17 publications

(9 citation statements)

References 48 publications

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“…But rice straw has been utilized for small-scale energy generation for a long time since it is readily available and affordable. In recent years, a range of rice straw products have been created, including polymer composite resins and lumbers, which were manufactured by combining milled straws with polymer resin. − It is possible for products with smart features to respond to environmental stimuli, resulting in unique variable properties. − An example of smart products that change color upon exposure to light includes fluorescent sensors. It has recently been more popular to develop sensor strips because of their simple preparation and use, adaptable structure, and potential applications in many fields like logic gates, medical and environmental sensors, and security alerts.…”

Section: Resultsmentioning

confidence: 99%

“…Rice straw waste was supplied from Egypt’s Sharqia. Rice straw was used to prepare cellulose diacetate as previously described. , The rice straw waste was repeatedly rinsed with water to get rid of dust and other solid pollutants and then chopped up and dried for 1 h at 80 °C. A 17.5% (w/w) portion of sodium hydroxide aqueous solution was used to soak the straw parts (∼5 cm) for 2 h. After rinsing and blending the swollen straws for around 30 min in a blender, the straws were air-dried under ambient circumstances.…”

Section: Methodsmentioning

confidence: 99%

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Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

et al. 2022

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Persistent bad breath has been reported as a sign of serious diabetes health conditions. If an individual’s breath has a strong odor of acetone, it may indicate high levels of ketones in the blood owing to diabetic ketoacidosis. Thus, acetone gas in the breath of patients with diabetes can be detected using the current easy-to-use fluorescent test dipstick. In another vein, rice straw waste is the most well-known solid pollutant worldwide. Thus, finding a simple technique to change rice straw into a valuable material is highly important. A straightforward and environmentally friendly approach for reprocessing rice straw as a starting material for the creation of fluorescent nitrogen-doped carbon dots (NCDs) has been established. The preparation process of NCDs was carried out via one-pot hydrothermal carbonization using NH 4 OH as a passivation substance. A testing strip was developed on the basis of cellulose CD nanoparticles (NPs) immobilized onto cellulose paper assay. The NCDs demonstrated a quantum yield of 23.76%. A fluorescence wavelength was detected at 443 nm upon applying an excitation wavelength of 354 nm. NCDs demonstrated remarkable selectivity for acetone gas as their fluorescence was definitely exposed to quenching by acetone as a consequence of the inner filter effect. A linear correlation was observed across the concentration range of 0.5–150 mM. To detect and measure acetone gas, the present cellulose paper strip has a “switch off” fluorescent signal. A readout limit was accomplished for an aqueous solution of acetone as low as 0.5 mM under ambient conditions. The chromogenic fluorescence of the cellulose assay responsiveness depends on the fluorescence quenching characteristic of the cellulose carbon dots in acetone. A thin fluorescent cellulose carbon dot layer was deposited onto the surface of cellulose strips by a simple impregnation process. CDs were made using NP morphology and analyzed using infrared spectroscopy and transmission electron microscopy. The carbon dot distribution on the paper strip was evaluated by scanning electron microscope and energy-dispersive X-ray analysis. The absorption and fluorescence spectral analyses were investigated. The paper sheets’ mechanical qualities were also examined.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

et al. 2022

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“…The detection process was carried out according to a modified reported method. [ 16 ] Test tubes of DFP (5 ml; pH 6.8) and 10 ml test tubes were utilized to analyze the nanocomposite strip's activity in order to examine the reversibility of PVA‐MFC‐H. DFP gas was inhaled into the test tube and the sensor strip (H 6 ) was put near the lip of the test tube at 45°C in order to demonstrate a rapid colorimetric change.…”

Section: Methodsmentioning

confidence: 99%

“…[12,13] Solid state detection approaches have proven essential owing to their simplicity, reusability, and portability, allowing for rapid online detection at a cheap cost. [14][15][16][17][18][19] Analytes, like gases and fluids, can be swiftly adsorbed and diffused through the mesh because of the huge surface area of cellulose microstructures to result in great sensitivity. There are many methods have been reported to detect nerve agents, including enzymatic, surface acoustic wave, electrochemical, and fluorescent approaches.…”

Section: Introductionmentioning

confidence: 99%

Preparation of microfibrillated cellulose/polyvinyl alcohol test strip integrated with novel chemosensor for colorimetric determination of diisopropyl fluorophosphate

et al. 2022

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Exposure to the odorless or colorless nerve agents can result in organ paralysis, failure, or even death. Novel nanocomposite‐based microporous strips that can be used with the naked eye to detect diisopropyl fluorophosphate (DFP) nerve agent mimic within a few seconds have been developed. A simple preparation procedure was used to prepare novel quinoline‐bearing hydrazone‐type tricyanofuran (QHTCF) chromophore via an azo‐coupling of 8‐aminoquinoline diazonium salt with the active methyl‐containing tricyanofuran. The chemical structure of QHTCF was inspected with FTIR, 1H/13CNMR, and elemental analysis. An environmentally friendly procedure was employed to prepare microfibrillated cellulose from sugarcane bagasse agricultural waste that has been one of the most well‐known solid pollutants worldwide. Therefore, it has been highly significant to find out a simple procedure to exchange sugarcane bagasse into valuable materials. Microfibrillated cellulose/polyvinyl alcohol/hydrazone (PVA‐MFC‐H) composites were prepared using different concentrations of QHTCF chromophore. With an increase in DFP concentration, the absorption intensity of the QHTCF‐containing nanocomposite rose from 426 to 562 nm. A wide range of detection limit was monitored for DFP using the current PVA‐MFC‐H sensor strip. The CIE Lab measurements demonstrated a yellow‐to‐purple color shift of PVA‐MFC‐H upon exposure to DFP. The current PVA‐MFC‐H strip demonstrated a detection limit for DFP in the range of 25–300 ppm. The current sensors were tested for their morphologies, fiber crystallinity, thermal stability, and mechanical characteristics.

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“…Smart textiles are wearable materials, able to convert stimuli into responses, interacting dynamically with the environment. In recent years, they have emerged as attractive resources due to the tremendous potential background in the Internet of Things (IoT) and military, space, healthcare or wellness applications [ 1 , 2 , 3 , 4 , 5 , 6 ]. As a result, widespread research and development have been carried out, making them an indispensable part of an emerging new technology field.…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Assisted Immobilization of Alizarin Red S on Polyester Fabrics for Developing Stimuli-Responsive Wearable Sensors

et al. 2022

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In the field of stimuli-responsive materials, introducing a pH-sensitive dyestuff onto textile fabrics is a promising approach for the development of wearable sensors. In this paper, the alizarin red S dyestuff bonded with a sol-gel precursor, namely trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane, was used to functionalize polyethylene terephthalate fabrics, a semi-crystalline thermoplastic polyester largely used in the healthcare sector mainly due to its advantages, including mechanical strength, biocompatibility and resistance against abrasion and chemicals. The obtained hybrid halochromic silane-based coating on polyester fabrics was investigated with several chemical characterization techniques. Fourier transform infrared spectroscopy and X-ray Photoelectron Spectroscopy confirmed the immobilization of the dyestuff-based silane matrix onto polyethylene terephthalate samples through self-condensation of hydrolyzed silanols under the curing process. The reversibility and repeatability of pH-sensing properties of treated polyester fabrics in the pH range 2.0–8.0 were confirmed with diffuse reflectance and CIELAB color space characterizations. Polyester fabric functionalized with halochromic silane-based coating shows the durability of halochromic properties conversely to fabric treated with plain alizarin red S, thus highlighting the potentiality of the sol-gel approach in developing durable halochromic coating on synthetic substrates. The developed wearable pH-meter device could find applications as a non-invasive pH sensor for wellness and healthcare fields.

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Novel halochromic hydrazonal chromophore immobilized into rice-straw based cellulose aerogel for vapochromic detection of ammonia

Cited by 17 publications

References 48 publications

Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

Optical Detection of Acetone Using “Turn-Off” Fluorescent Rice Straw Based Cellulose Carbon Dots Imprinted onto Paper Dipstick for Diabetes Monitoring

Preparation of microfibrillated cellulose/polyvinyl alcohol test strip integrated with novel chemosensor for colorimetric determination of diisopropyl fluorophosphate

Sol-Gel Assisted Immobilization of Alizarin Red S on Polyester Fabrics for Developing Stimuli-Responsive Wearable Sensors

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