Nakarin Subjalearndee

• Doctor of Philosophy
• Researcher at National Nanotechnology Center

We developed utilization models of supported electrospun TiO2-ZnWO4 photocatalytic nanofibrous membranes for air and water purifications using a noncomplex system with facile adaptation for large-scale processes. For this uniquely designed and multimode catalyst, ZnWO4 is selected for a visible light activity, while TiO2 is incorporated to enhance...

We present the fabrication of graphene oxide (GO) and manganese dioxide (MnO2) composite fibers via wet spinning processes, which entails the effects of MnO2 micromorphology and mass loading on the extrudability of GO/MnO2 spinning dope and on the properties of resulted composite fibers. Various sizes of rod and sea-urchin shaped MnO2 microparticle...

A facile and effective means of nanofibres’ self-twisting is pioneered under a strong electrostatic induction during electrospinning process. The assembly of self-bundled nanofibre yarns is driven by the attractive forces induced by the interactions between highly charged and ionic tungsten (VI) in ammonium metatungstate that bonds with cyanide gro...

Single-ion conducting polymer electrolytes (SIPEs) can be formed by anchoring charge delocalized anions on the side chains of a crosslinked polymer matrix, thereby eliminating the severe concentration polarization effect in conventional dual-ion polymer electrolytes. Addition of a plasticizer into the polymer matrix confers advantages of both liqui...

Cable/fiber-shaped Zn-ion batteries are designed to power wearable electronics that require high flexibility to operate on human body. However, one of technical challenges of these devices is the complexity and high cost for manufacturing fibered cathode. In this work, we demonstrated gamma manganese oxide (ɣ-MnO2)/reduced graphene oxide (rGO) fibe...

Carbon nanofiber has been one of the promising electrode materials for supercapacitors. It is desirable but still challenging to optimize meso-/micro-pore ratio and configuration while achieving a high specific surface area in carbon nanofibers. Here, we present the design and preparation of carbon nanofiber mats with both high specific surface are...

Flexible carbon nanobelt webs (CNBWs) with a hierarchical porous structure, considerable N- and/or O-containing surface functionalities were fabricated by electrospinning of phenolic resin/PVP/magnesium nitrate (MNH) solution, followed by curing, thermal treatment and picking. The effect of spinning humidity on the morphology of cured fibers was in...

While titanium dioxide (TiO2) is highly regarded as one of the most promising catalysts for air-pollution mitigation, its practical use has been challenging due to structural complexity, process scalability, and high cost of existing fabrication methods. In this study, a facile spray-coating method is employed for fabrication of a TiO2-coated filte...

n-Breeze: Multifunctional & Scalable nanofilter with Mechanically-Robust and Ultrathin Nanofibrous Membranes for Tuberculosis Elimination

Deposition of functional metal films onto mechanically-sensitive nanostructures has been challenging as conventional wet reduction process could easily lead to physical damages and structural inhomogeneity at nanometer length scale. As PECVD technique not only offers noninvasive approach to single layer metal coating, it also entails processes’ sca...

In tropical countries, food and agricultural crops need to be kept cool to reduce spoilage and quality losses. Airborne psychrotrophic bacteria and fungi can cause adverse effects on food quality and consumers' health safety. The present study aimed to present a facile and cost-effective approach to remove airborne microbes from indoor air by emplo...

As textiles with multi-functions involved various cost and time consuming processes with different chemicals, we proposed a novel, facile, and environmentally friendly single-step coating based on mixed-colloid and water-based systems for multifunctional biodefense applications in textiles. This research pioneered the fabrication of mosquito repell...

M. tuberculosis H37Ra is one of the most virulent microbes in the world; it causes endemic and neglected disease that is highly drug resistant, and no vaccine has yet been created for it. In this present study, mechanically robust and potent antibacterial membranes were fabricated for total elimination of water and airborne tuberculosis (TB) bacter...

The objective of the present work is to develop nanofibrous membranes from rice-flour based nanofibers containing PVA for high efficiency filtration. Rice flour-based biodegradable nanofibrous membranes were prepared by an electrospinning technique. The contents of the rice flour in solution were systematically varied before 25% w/w was set as an o...

Rice flour is a naturally abundant and renewable biodegradable and biocompatible material. Nevertheless, fabrication of rice flour-based functional nanostructures has been challenging due to the difficulties in fine-tuning solution parameters. The present work shows a successful synthesis of rice-flour based nanofibers containing PVA by simply allo...

With unprecedented solar light active ZnWO4/mixed-phased TiO2 nanofibers as a model nanostructure, we showed that by simply allowing as-spun organic-inorganic hybrid samples to undergo thermal relaxation in combination with fiberglass confined calcination, as-desired and free-standing metal oxide nanofibrous membranes could be achieved for the firs...

While simple mixing of the multiple nanostructural components might not necessarily satisfy the multiple functional requirements, this research work showed that such structural complexity demanded both strategic structural design and deliberate fabrication methods. As such, nanosilver-hybridized WO3 nanofibers incorporating paramagnetic CoFe2O4 nan...