Panitat Hasin

Kasetsart University | KU · Department of Chemistry

Bagasse-derived carbon electrodes were developed by doping with nitrogen functional groups and compositing with high-capacity MnO2 nanoparticles (MnO2/NBGC). The bagasse-derived biochar was N-doped by refluxing in urea, followed by the deposition of MnO2 nanoparticles onto its porous surface via the hydrothermal reduction of KMnO4. Different initia...

We propose a nano-bimetallic platinum/nickel composite on multi-walled carbon nanotubes (nano-Pt/Ni@MWCNT) composite as electrode material, which was prepared via a simple a pyrolysis method followed by mechanical ball-milling process. Results showed that the nano-Pt/Ni particles could be anchored on the surface of the MWCNT, which was confirmed by...

In this study, butadiene sulfone (BS) was selected as an efficient electrolyte additive to stabilize the solid electrolyte interface (SEI) film on the lithium titanium oxide (LTO) electrodes in Li-ion batteries (LIBs). It was found that the use of BS as an additive could accelerate the growth of stable SEI film on the LTO surface, leading to the im...

In this current work, the pristine LiNi0.5Mn1.5O4 (LNMO) and fluorine-doped LiNi0.5Mn1.5O4–xFx (x = 0.1; 0.2; 0.3) cathode materials were successfully synthesized through a facile spray-drying method. The performed morphological and structural characterizations revealed that the fluorine doping led to a partial conversion of Mn⁴⁺ to Mn³⁺ ions in LN...

The structures of 2-(3-hydroxy-5-methylphenoxy)-N-(4-nitrophenyl)acetamide), B1, and 2-(3-hydroxy-5-methylphenoxy)-N-(4-(trifluoromethyl)phenyl)acetamide, B2, are crystallized in the crystal symmetry of the monoclinic structure and in the space group of P21/c. For the different structures of B1 and B2, B1 displays an absolute planarity conformation...

The design and discovery of free-standing hybrid electrode materials with large absolute capacity and high cycling stability for energy storage become desirable and are still challenging. In this work, we demonstrate that the hybrid supercapacitor (HSC) device is assembled by 3D core-shell hierarchical nanorod arrays of Ni3S2@NiCoP nanocomposite fo...

The promising candidates for high-performance electrode materials, transition metal [email protected] mesoporous carbon composites (M/MO/M(OH)2@NDMCs), were synthesized by carbonization of metal ion-doped polyaniline (PANI) functionalized mesoporous silica SBA-15, followed by etching the mesoporous silica template. The yielded M/MO/M(OH)2@NDMC can...

In this study, spinel LiNi0.5Mn1.5O4 (LNMO) was successfully decorated with Al2O3 thin film by using atomic layer deposition (ALD) approach and evaluated as a cathode material for high-temperature applications in lithium ion batteries (LIBs). To optimize the LNMO-Al2O3 electrodes operated at elevated temperature (55 °C), the effects of Al2O3 thickn...

In this study, Co0.85Se thin film of monodispersed morphology with interconnected and opened porous structure was successfully prepared via a facile electrodeposition method and employed as a free-standing cathode material in hybrid supercapacitors (HSCs). After the optimization of the applied potential for Co0.85Se electrodeposition, the Co0.85Se...

We report a practical electrochemical biosensor for the detection of chlorpyrifos from vegetables using a new type of microsphere of CuInS2 (CIS)-linked reduced graphene oxide (rGO). The CIS microspheres offer a redox center (Cu⁺/In³⁺), large number of active sites, and high surface area. Moreover, rGO exhibits good conductivity. Thus, the microsph...

Seeking inexpensive, cost-effective fabrication, and highly effective Pt-free counter electrode (CE) electrocatalysts to replace the conventional Pt CE for dye-sensitized solar cells (DSSCs) is of great challenge. Here, molybdenum disulfide (MoS2) thin films were directly electrodeposited on F-doped tin oxide (FTO) glass substrates via facile one-s...

Small molecules of aniline (AN) and nitrobenzene (NB) doped on reduced graphene oxide nanosheets (rGO) represent the attractive Pt-free and earth abundant counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). Scanning electron microscope and transmission electron microscope confirm a very thin layer structure with wrinkled and folded nano...

In this study, a novel hierarchical hybrid of tungsten species nanoparticles anchored on nitrogen-doped hollow mesoporous carbon (WC/N-HHMC) with high surface area and hierarchical porosity is synthesized and investigated as a noble metal-free counter electrode (CE) for dye-sensitized solar cells (DSSCs). The unique characteristics such as co-dopin...

Nitrogen-doped mesoporous carbon (N-MC) modified glassy carbon electrode (GCE) with high electrocatalytic activity is presented for highly sensitive determination of capsaicin. Due to its moderate specific surface area (151 m² g⁻¹) and uniform mesostructure (3.9 nm), the N-MC/GCE enhances the adsorption kinetics of capsaicin on the electrode surfac...

Nanocomposites of cobalt or nickel species and N-doped mesoporous carbon (Co-N-MC or Ni-N-MC) were prepared by in situ polymerized mesoporous silica-supported polyaniline (PANI) and then explored as the counter electrodes (CEs) in dye-sensitized solar cells (DSCs). It is shown that Co-N-MC and Ni-N-MC significantly improve the electrocatalytic acti...

Amorphous CoO obtained by electrochemical milling (ECM) process offers high catalytic activity towards sulfurization reaction to form amorphous CoS compared to crystalline CoO. The obtained amorphous CoS resulted in high electrocatalytic performance towards the reduction of tri-iodide for dye-sensitized solar cells (DSCs). The DSCs fabricated using...

A study was made of the different preparation methods affecting the morphology and reducibility of the obtained NiAl2O4 spinels. The NiAl2O4 with various morphologies has been fabricated through the dependent control of TEA (triethanolamine) -gel parameters. Compared to the NiAl2O4 prepared from a direct calcination of spinel precursors, the superb...

A simple and efficient synthesis of Co2C using graphene oxide (GO) as a carbon source has been established. The procedure consists of two steps: (1) formation of a GO/Co3O4 nanocomposite via the ammonia-evaporation-induced method and (2) conversion of Co3O4 to Co2C under a H2/N2 mixture at a low temperature (200 °C). Transmission electron microscop...

We have systematically studied the effects of substitutional doping of p-type nanoparticulate NiO with cobalt ions. Thin films of pure and Co-doped NiO nanoparticles with nominal compositions Co(x)Ni(1-x)O(y) (0 ≤ x ≤ 0.1) were fabricated using sol-gel method. X-ray photoelectron spectroscopy revealed a surface enrichment of divalent cobalt ions in...

We report the sonochemical synthesis of copper(I) hydride (CuH) by the ultrasonic irradiation of a copper(II) aqueous solution. A reaction mechanism based on the reduction of copper(II) by the ultrasound-generated hydrogen atoms is discussed. To the best of our knowledge, this is the first time that a metal hydride has been synthesized through sono...

This article presents a fundamental and systematic investigation of NiO based p-type dye-sensitized solar cells (p-DSCs) using electrochemical impedance spectroscopy (EIS). The Nyquist plot features two semicircles. By varying the electrocatalytic properties of the counter electrode and the illumination intensities, we have unambiguously assigned t...

We report a general method to graft aromatic molecules onto graphene thin film electrodes through a simple immersion process. Large-area electroactive graphene thin films grafted with methylene blue (MB) have been developed as electrocatalytic electrodes for the oxidation of β-nicotinamide adenine dinucleotide (NADH). The oxidation of NADH starts f...

Graphene films have been used as transparent conductive electrodes (TCEs) and counter electrodes in dye-sensitized solar cells (DSCs) in order to reduce the cost of fabrication. This work reports the fundamental electrocatalytic properties of graphene films toward I−/I3− by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). T...

NixCo3-XO4 nanowire arrays are grown on a Ti foil for efficient oxygen evolution reactions. Ni-doped nanowire arrays have higher electrocatalytic activity than pure CO3O 4. The success of the nanowire electrodes results from their high surface areas and direct electron contact to the conductive substrate. (Figure Presented)

Mesoporous Nb-doped TiO2 film was prepared by the sol−gel method on a transparent conducting FTO glass. Pt nanoparticles were impregnated in the mesoporous TiO2 support substrate and tested for the counter electrode in dye-sensitized solar cells (DSSCs). The mesoporous Pt/Nb-doped TiO2 was characterized by scanning electron microscopy and high-reso...

A reaction of aluminium hydroxide, nickel nitrate and triethanolamine in ethylene glycol provided, in one step, a simple and effective nickel-aluminium complex precursor for NiAl2O4 spinel. On the basis of H-1-, C-13-NMR spectroscopy, and mass spectrometry, the possible structure of the complex was proposed as a trimetallic double alkoxide consisti...