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Recent progress of two-dimensional materials and metal–organic framework-based taste sensors
HASANI AMIRHOSSEIN,Do Ha Huu,Tekalgne Mahider,홍성현,장호원,김수영 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.4
In food industries, the detection of diff erent tastes in low level is required to enhance the quality of products. Recently, 2-D materials and metal–organic framework (MOF) have attracted extensive attention owing to their unique properties, and they can be used in various applications, especially chemical and biochemical sensing. In this review, we investigate the recent progress of the 2-D materials and MOF in the taste sensing applications. From the review, we could conclude that these materials would be promising candidates for taste sensing applications, thereby leading to the development of food industry.
Hasani, Amirhossein,Le, Quyet Van,Nguyen, Thang Phan,Choi, Kyoung Soon,Sohn, Woonbae,Jang, Ho Won,Kim, Soo Young Elsevier 2018 ELECTROCHIMICA ACTA Vol.283 No.-
<P><B>Abstract</B></P> <P>In this research, we investigate the effect of metal doping on the electrochromic (EC) performance of tungsten trioxide (WO<SUB>3</SUB>) films. These films were prepared by a novel method involving solution processing and thermal annealing. In this procedure, ammonium tetrathiotungstate ((NH<SUB>4</SUB>)<SUB>2</SUB>WS<SUB>4</SUB>) was dissolved in dimethylformamide at a high concentration ratio (200 mg mL<SUP>−1</SUP>) to obtain a homogeneous solution and then spin-coated onto the indium thin oxide (ITO) substrate for use as a working electrode. Subsequently, the film was annealed at the different temperatures (200, 300, 400, and 500 °C) to form a crystal structure of WO<SUB>3</SUB>. X-ray diffraction, Raman, and X-ray photoelectron spectroscopic results confirm the crystal formation of WO<SUB>3</SUB>. Moreover, in order to improve the electrochromic performance, different concentrations (10, 20, 30, and 40 mM) of different metal chlorides such as PtCl<SUB>4</SUB>, PdCl<SUB>2</SUB>, AuCl<SUB>3</SUB>, AgC<SUB>l</SUB>, CuCl<SUB>2</SUB>, NiCl<SUB>2</SUB>, NaCl, and KCl were added into the (NH<SUB>4</SUB>)<SUB>2</SUB>WS<SUB>4</SUB> precursor and the mixture was coated on the ITO substrate and annealed at 500 °C. The results indicate that the performance of the Au-doped WO<SUB>3</SUB> film was better than those with other dopants, likely as a result of the plasmonic effect. Therefore, the proposed method and Au-doped WO<SUB>3</SUB> films are great candidates for the development of smart windows with high EC performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Producing high quality and efficient metal-doped WO<SUB>3</SUB> film by a facile solution process. </LI> <LI> A uniform Distribution of metal atoms into WO<SUB>3</SUB> film during doping process by this proposed method. </LI> <LI> Application of optimized Au-doped WO<SUB>3</SUB> film as working electrode in electrochromic devices. </LI> <LI> Employing Au as a dopant in WO<SUB>3</SUB> is a remarkable advancement for electrochromic panels and smart windows. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Tungsten Trioxide Doped with CdSe Quantum Dots for Smart Windows
Hasani, Amirhossein,Le, Quyet Van,Tekalgne, Mahider,Guo, Wenwu,Hong, Sung Hyun,Choi, Kyoung Soon,Lee, Tae Hyung,Jang, Ho Won,Kim, Soo Young American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.50
<P>Nanocrystal quantum dots (QDs) provide tunable optoelectronic properties on the basis of their dimension. CdSe QDs, which are size-dependent colloidal nanocrystals, are used for efficient electrochromic devices owing to their unique properties in modulating quantum confinement, resulting in enhanced electron insertion during the electrochromic process. Incorporating a well-known metal oxide electrochromic material such as WO<SUB>3</SUB> into CdSe QDs enhances the redox process. Herein, we propose a facile method for producing and optimizing CdSe QDs doped in WO<SUB>3</SUB>. The fabrication of the electrochromic film involves a solution and annealing process. Moreover, the effect of the QD size to optimize the electrochromic layer is studied. As a result, the coloration efficiency of WO<SUB>3</SUB> and optimized CdSe QD-WO<SUB>3</SUB> are obtained as 68.6 and 112.3 cm<SUP>2</SUP>/C, respectively. Thus, size-tunable nanocrystal QDs combined with a metal oxide yield high-performance electrochromic devices and are promising candidates for producing smart windows.</P> [FIG OMISSION]</BR>
Hasani, Mahdi,Roshanian, Jafar,Khoshnooda, A. Majid Techno-Press 2017 Advances in aircraft and spacecraft science Vol.4 No.1
Aerospace Launch Vehicles (ALV) are generally designed with high reliability to operate in complete security through fault avoidance practices. However, in spite of such precaution, fault occurring is inevitable. Hence, there is a requirement for on-board fault recovery without significant degradation in the ALV performance. The present study develops an advanced fault recovery strategy to improve the reliability of an Aerospace Launch Vehicle (ALV) navigation system. The proposed strategy contains fault detection features and can reconfigure the system against common faults in the ALV navigation system. For this purpose, fault recovery system is constructed to detect and reconfigure normal navigation faults based on the sliding mode observer (SMO) theory. In the face of pitch channel sensor failure, the original gyro faults are reconstructed using SMO theory and by correcting the faulty measurement, the pitch-rate gyroscope output is constructed to provide fault tolerant navigation solution. The novel aspect of the paper is employing SMO as an online tuning of analytical fault recovery solution against unforeseen variations due to its hardware/software property. In this regard, a nonlinear model of the ALV is simulated using specific navigation failures and the results verified the feasibility of the proposed system. Simulation results and sensitivity analysis show that the proposed techniques can produce more effective estimation results than those of the previous techniques, against sensor failures.
Hasani, Amirhossein,Tekalgne, Mahider,Le, Quyet Van,Jang, Ho Won,Kim, Soo Young The Royal Society of Chemistry 2019 Journal of materials chemistry. A, Materials for e Vol.7 No.2
<P>The issues of global warming and fossil fuel shortage have increased the demand for clean and renewable energy. Many researchers are investigating strategies to produce hydrogen and reduce CO2 by using solar power. Two-dimensional (2D) materials, such as graphene, graphene derivatives, and transition metal dichalcogenides (TMDs), have been extensively used owing to their extraordinary electronic and optical properties. In this review, we investigate the recent developments in 2D materials for photocatalytic applications involving the hydrogen evolution reaction and CO2 reduction. The synthesis methods and the photocatalytic properties of TMDs and graphene-based 2D materials are thoroughly discussed. Moreover, a summary of the recently developed 2D nanostructures and devices for solar hydrogen production and CO2 reduction is presented, and it is revealed that the use of 2D catalyst materials has great potential for commercialization in the near future to help overcome the energy crisis.</P>
The role of metal dopants in WS<sub>2</sub> nanoflowers in enhancing the hydrogen evolution reaction
Hasani, Amirhossein,Nguyen, Thang Phan,Tekalgne, Mahider,Van Le, Quyet,Choi, Kyoung Soon,Lee, Tae Hyung,Jung Park, Tae,Jang, Ho Won,Kim, Soo Young Elsevier 2018 Applied Catalysis A Vol.567 No.-
<P><B>Abstract</B></P> <P>We demonstrate a facile and efficient method for the synthesis of a metal-doped WS<SUB>2</SUB> nanoflower (NF) catalyst. We also report its application for the electrocatalytic hydrogen evolution reaction (HER). The flower-like WS<SUB>2</SUB> particles were produced by a hydrothermal reaction, and, subsequently, the WS<SUB>2</SUB> was doped with metal chlorides such as AuCl<SUB>3</SUB>, AgCl, PtCl<SUB>2</SUB>, and PdCl<SUB>2</SUB>, followed by reduction with sodium borohydride to form metal-doped WS<SUB>2</SUB> NFs. The Pd-doped WS<SUB>2</SUB> NF catalyst showed a high HER performance, having a Tafel slope of 54 mV/dec and an overpotential of -175 mV at −10 mA cm<SUP>−2</SUP>. The improvement is attributed to the energy band alignment near the H<SUP>+</SUP>/H<SUB>2</SUB> reduction potential and the large surface area of the WS<SUB>2</SUB> NFs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Producing high quality and efficient WS<SUB>2</SUB> nanoflowers by a facile hydrothermal process. </LI> <LI> Metal doping of WS<SUB>2</SUB> nanoflowers <I>via</I> reduction process. </LI> <LI> A uniform distribution of metal atoms into WS<SUB>2</SUB> nanoflowers during doping process. </LI> <LI> Application of optimized Pd-doped WS<SUB>2</SUB> nanoflowers as a catalyst in hydrogen evolution reaction. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Shabnam Hasani,Faramarz Doulati Ardejani,Mohammad Ebrahim Olya 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.8
Adsorption of BR 18 dye onto nano-clay adsorbent was investigated. Nano-clay was characterized by using FTIR, SEM, TEM, XRD and BET analysis. The percent removal increased by increasing nano-clay dose, while pH and stirring speed had no significant effect on the adsorption rate. It was observed that the uptake of dye onto nano-clay initially increased rapidly, and then decreased slowly until the equilibrium was reached. The adsorption capacity rose with an increase in temperature. Moreover, the adsorption kinetics was very fast and followed a pseudo second-order. The intra-particle diffusion was observed to be the rate-controlling step. In addition, equilibrium data fitted well with the Langmuir adsorption model. This paper also presents a numerical simulation incorporating the second-order kinetic expression using COMSOL Multiphysics software. The numerical modelling results and the experimental data were in excellent agreement.