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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,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>
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>
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>
Kim, Tae Hoon,Hasani, Amirhossein,Quyet, Le Van,Kim, Yeonhoo,Park, Seo Yun,Lee, Mi Gyoung,Sohn, Woonbae,Nguyen, Thang Phan,Choi, Kyoung Soon,Kim, Soo Young,Jang, Ho Won Elsevier 2019 Sensors and actuators. B Chemical Vol.286 No.-
<P><B>Abstract</B></P> <P>The use of chemoresistive gas sensors based on metal oxides has expanded to various fields such as medical diagnosis and air quality systems as well as gas leakage detectors with the development of the Internet of Things. Accordingly, sensitivity, selectivity, power consumption, and reproducibility become important factors in the development of gas sensors. Herein, we developed a facile method to fabricate a gas sensor based on porous Au-incorporated tungsten trioxide (WO<SUB>3</SUB>) thin films for highly sensitive and selective NO<SUB>2</SUB> sensing. The mixed solution of ammonium tetrathiotungstate [(NH<SUB>4</SUB>)<SUB>2</SUB>WS<SUB>4</SUB>] and gold chloride (AuCl<SUB>3</SUB>) was transformed to Au-incorporated WO<SUB>3</SUB> thin films through the spin-coating and annealing process. The gas sensors based on the Au-incorporated WO<SUB>3</SUB> thin films exhibited improved sensitivity, selectivity, and response time upon exposure to NO<SUB>2</SUB> with a significantly low theoretical detection limit of 28 ppt at 150 ℃ compared to gas sensors based on the pristine WO<SUB>3</SUB> thin film. The high sensing properties are attributed to the porous structure and catalytic effects of Au nanoparticles. In addition to these remarkable NO<SUB>2</SUB> sensing properties, the facile and cost-effective fabrication process enlarges the potential of the Au-incorporated WO<SUB>3</SUB> thin films for practical and commercial gas sensing applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Au-incorporated WO<SUB>3</SUB> thin films are synthesized by the facile method using solution process and annealing. </LI> <LI> Sensors based on the Au-incorporated WO<SUB>3</SUB> thin films exhibit high sensitivity and good selectivity for NO<SUB>2</SUB> sensing. </LI> <LI> The enhanced sensing properties are attributed to the porous structure and the catalytic effect of the Au nanoparticles. </LI> </UL> </P>
유영택 ( Youngtaek Yoo ),( Amirhossein Hasani ),( Ha Huu Do ),김수영 ( Soo Young Kim ) 한국공업화학회 2020 공업화학전망 Vol.23 No.3
식품 산업에서 제품의 품질을 향상시키기 위해서는 약한 세기의 맛에서도 다양한 종류의 맛을 감지해낼 수 있어야만 한다. 이러한 목적 달성을 위해서 2차원 물질과 금속유기골격체(metal-organic framework, MOF)를 이용한 미각 감지센서에 대한 연구들이 한창 진행 중이다. 2차원 물질 및 MOF는 고유한 특성으로 인하여 현재 다양한 분야에서 많은 관심을 받아오고 있으며 화학 및 생화학 감지 등 다양한 분야에서도 응용될 수 있다. 본 기고문에서는 미각 감지 응용에서 2차원 물질과 MOF의 최신 연구동향을 다루고자 한다. 본 기고문을 통하여 미각 감지 응용 분야에서 2차원 물질과 MOF의 작용 메커니즘을 이해하고 현재의 연구 현황 및 앞으로의 발전 방향을 알아보고자 한다.