Kenji Takeuchi
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Hemp-Derived Hierarchical Porous Carbon with an Optimized Pore Structure by NaOH Activation for Supercapacitor Applications Open
This study focuses on converting hemp hurd, a byproduct of hemp stalk processing, into high-performance activated carbon for supercapacitor applications. Hemp hurd was pyrolyzed and subsequently activated with NaOH at various ratios (bioch…
View article: Advanced Water Production via Point of Use Super‐Ultralow‐Pressure Reverse Osmosis and Cellulose‐Polyamide Thin‐Film Nanocomposite Membranes
Advanced Water Production via Point of Use Super‐Ultralow‐Pressure Reverse Osmosis and Cellulose‐Polyamide Thin‐Film Nanocomposite Membranes Open
A novel thin‐film nanocomposite reverse osmosis (RO) membrane was developed for point‐of‐use applications (POU‐RO) at super‐ultralow pressure (0.2 MPa), incorporating carboxymethylated cellulose nanofibers (CM‐CNF). The CM‐CNF with an incr…
Less plastic, more profits? Estimating the effect of firms’ efforts for plastic reduction on their financial performance Open
This study examines the impact of firms’ efforts to reduce plastic usage on their financial performance. Using a difference-in-differences approach with matching, we find that Japanese firms in the food industry declaring their commitment …
View article: Building Powerful Zinc‐Ion Hybrid Capacitors by an Energy Drink‐Inspired Strategy
Building Powerful Zinc‐Ion Hybrid Capacitors by an Energy Drink‐Inspired Strategy Open
Numerous modification strategies have been proposed to enhance the performance of the Zn anode and carbon cathode in aqueous zinc‐ion hybrid capacitors (ZIHCs). However, one efficient strategy to modify both the anode and cathode is still …
Optimizing Electrochemical Performance: A Study of Aqueous Electrolytes with Hemp-Derived Activated Carbon for Supercapacitors Open
This work investigates the synthesis and electrochemical performance of hemp-derived activated carbon (HAC) for supercapacitor electrode applications. HAC was prepared through NaOH chemical activation, and its electrochemical characteristi…
Reforming Multifunctional Solid Electrolyte Interphase for High‐Performance Zn Anode Through a Nature‐Inspired Strategy Open
Aqueous Zn metal batteries (AZMBs) have appealing advantages, including good safety, low cost, and high volumetric energy density. However, serious parasitic reactions and dendrite growth at Zn anodes hinder practical applications of AZMBs…
Laser-induced graphene electrochemical immunosensors for rapid and sensitive serological detection: A case study on dengue detection platform Open
Here, we present a diagnostic on a chip platform based on laser-induced graphene (LIG) electrochemical immunosensors for serological detection. The electrochemical immunosensors are fabricated through CO2 laser induction on polyimide (PI) …
Edge sites on platinum electrocatalysts are responsible for discharge in the hydrogen evolution reaction Open
New insights into the electrochemical functionalities of the edge sites on platinum in the hydrogen evolution reaction and novel nanotechnological strategies to produce edge-rich electrocatalysts are described.
Reusability, Long‐Life Storage and Highly Sensitive Zirconium Nitride (ZrN) Surface‐Enhanced Raman Spectroscopy (SERS) Substrate Fabricated by Reactive Gas‐Timing Rf Magnetron Sputtering Open
Transition metal nitrides (TMN) are promising material alternative to replace noble metals in the field of plasmonic applications, especially surface‐enhanced Raman spectroscopy (SERS). Here we demonstrate a practical surface enhanced Rama…
Control of Manganese Oxide Hybrid Structure through Electrodeposition and SILAR Techniques for Supercapacitor Electrode Applications Open
Manganese oxide has been studied as a promising supercapacitor electrode due to its high theoretical capacitance, low cost, and environmental friendliness. Supercapacitor performance such as specific capacitance, resistance, and cycle life…
The recycled content of plastic products: estimating the impact of a recycling law on the input mix Open
The use of recycled material is a key building block for the circular economy. In this study, we explore the impact of recycling laws in Japan on the use of recycled materials in the production process of intermediate plastics. Using a dif…
Tailoring Properties of Hafnium Nitride Thin Film via Reactive Gas-Timing RF Magnetron Sputtering for Surface Enhanced-Raman Scattering Substrates Open
This study successfully demonstrated the tailoring properties of hafnium nitride (HfN) thin films via reactive gas-timing (RGT) RF magnetron sputtering for surface-enhanced Raman spectroscopy (SERS) substrate applications. The optimal RGT …
View article: Graphene oxide membranes for lactose-free milk
Graphene oxide membranes for lactose-free milk Open
Because of the increasing demand for lactose-free milk, the dairy industry requires lactose separation membranes with effective antiorganic fouling. Here, we demonstrate that graphene oxide (GO) membranes exhibit higher lactose permeation …
View article: Graphene Oxide Membranes for Water Filtration
Graphene Oxide Membranes for Water Filtration Open
The water demand is increasing along with population growth, where freshwater sources are decreasing and improved methods for water reclamation are needed. This is fundamental to create self–sustaining societies. Graphene oxide (GO) membra…
View article: RO Membrane of Carbon Nanotubes / Crosslinked Polyamide Nanocomposite toward Green Desalination
RO Membrane of Carbon Nanotubes / Crosslinked Polyamide Nanocomposite toward Green Desalination Open
Reverse osmosis (RO) membrane technology has been developed since half century ago. Because of new events like as global warming and also increasing clean water demand in developing countries for economic growth, new challenges on the conv…
Development of a robust reverse osmosis membrane and module using multi-wall carbon nanotubes Open
Because of worldwide industrialization and increasing population, we are facing a problem concerning the availability of clean water. Therefore, the desalination of saline water using a reverse osmosis (RO) membrane is very important techn…
Durability Evaluation of an Additive Manufactured Biodegradable Composite with Continuous Natural Fiber in Various Conditions Reproducing Usage Environment Open
Recently, biodegradable plastic materials that can be decomposed by living organisms have attracted significant attention because of the great demand for the safe disposal of plastics. Recycling has failed to provide a practical solution f…
View article: Enhanced desalination performance in compacted carbon-based reverse osmosis membranes
Enhanced desalination performance in compacted carbon-based reverse osmosis membranes Open
Reverse osmosis membranes typically suffer compaction during the initial stabilization stage due to the applied hydraulic pressure, altering the desalination performance.
View article: Enhanced Antifouling Feed Spacer Made from a Carbon Nanotube–Polypropylene Nanocomposite
Enhanced Antifouling Feed Spacer Made from a Carbon Nanotube–Polypropylene Nanocomposite Open
Spacers are widely used in membrane technologies to reduce fouling and concentration polarization. Fouling can start from the spacer surface and grow, thereby reducing flux, selectivity, and operation lifetime. Fluorescein isothiocyanate l…
Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature Open
Graphite whiskers (GWs) are obtained from coffee grounds (CGs) treated at 2500 °C for 1 h in the presence of Ar gas at 1 atm. The majority of the GWs formed inside the CGs shell are rod‐like with a conical tip with diameter and length in t…
Preparation and electrochemical performance of nitrogen-enriched activated carbon derived from silkworm pupae waste Open
Nitrogen-enriched activated carbon from silkworm pupae prepared by hydrothermal treatment and chemical activation exhibited superior specific capacitance with excellent cycling stability.
Nitrogen self-doped activated carbons<i>via</i>the direct activation of<i>Samanea saman</i>leaves for high energy density supercapacitors Open
Nitrogen self-doped activated carbons with high surface area obtainedviathe direct activation ofSamanea samanleaves for high energy density supercapacitors.
Effective Antiscaling Performance of Reverse-Osmosis Membranes Made of Carbon Nanotubes and Polyamide Nanocomposites Open
The antiscaling properties of multiwalled carbon nanotube (MWCNT)-polyamide (PA) nanocomposite reverse-osmosis (RO) desalination membranes (MWCNT-PA membranes) were studied. An aqueous solution of calcium chloride (CaCl2) and sodium bicarb…
Robust water desalination membranes against degradation using high loads of carbon nanotubes Open
Chlorine resistant reverse osmosis (RO) membranes were fabricated using a multi-walled carbon nanotube-polyamide (MWCNT-PA) nanocomposite. The separation performance of these membranes after chlorine exposure (4800 ppm·h) remained unchange…
View article: Activities of the Water Treatment Project in Aqua Innovation Center at Shinshu University
Activities of the Water Treatment Project in Aqua Innovation Center at Shinshu University Open
Reverse osmosis (RO) membrane technology has been developed well since half century ago. Because of new threats like global warming and increasing clean water demand in developing countries for economic growth, new challenges on the conven…