Superselective Hydrogen Separation through a Mixed Conducting Graphene Oxide Membrane.

A cost-effective H separation method is required for the purification of gaseous mixtures containing H. Thus, in this study, we investigate the H separation properties of Ce ion-doped partially reduced graphene oxide (prGO) membranes. Pt/C-catalyst-coated, dense, micrometer-thick membranes are fabricated by stacking Ce-prGO nanosheets, followed by thermal annealing.

Graphene Oxide Membrane Reactor for Electrochemical Deuteration Reactions.

The deuteration of organic molecules is considerably important in organic and medicinal chemistry. An electrochemical membrane reactor using proton-conducting graphene oxide (GO) nanosheets was developed to synthesize valuable deuterium-labeled products via an efficient hydrogen-to-deuterium (H/D) exchange under mild conditions at ambient temperature and atmospheric pressure. Deuterons (D) formed by the anodic oxidation of heavy water (DO) at the Pt/C anode permeate through the GO membrane to the Pt/C cathode, where organic molecules with functional groups (C≡C and C═O) are deuterated with adsorbed atomic D species.

Selective Detection of CO Using Proton-Conducting Graphene Oxide Membranes with Pt-Doped SnO Electrocatalysts: Mechanistic Study by Operando DRIFTS.

To reduce the risk of carbon monoxide (CO) poisoning, there is a strong need for small, compact gas sensors to detect and monitor CO at ppm concentrations. In this study, we focused on detecting CO with electrochemical sensors based on proton-conducting graphene oxide (GO) nanosheets at room temperature. We found that a Ce-doped GO nanosheet membrane fitted with the sensing electrode composed of Pt (10 wt %)-doped SnO nanocrystals exhibits an excellent sensor response to CO at 25 °C.

Bandgap Engineering of Melon using Highly Reduced Graphene Oxide for Enhanced Photoelectrochemical Hydrogen Evolution.

The uncondensed form of polymeric carbon nitrides (PCN), generally known as melon, is a stacked 2D structure of poly(aminoimino)heptazine. Melon is used as a photocatalyst in solar energy conversion applications, but suffers from poor photoconversion efficiency due to weak optical absorption in the visible spectrum, high activation energy, and inefficient separation of photoexcited charge carriers. Experimental and theoretical studies are reported to engineer the bandgap of melon with highly reduced graphene oxide (HRG).

Energy Application of Graphene Based Membrane: Hydrogen Separation.

Hydrogen gas (H ) is a viable energy carrier that has the potential to replace the traditional fossil fuels and contribute to achieving zero net emissions, making it an attractive option for a hydrogen-based society. However, current H purification technologies are often limited by high energy consumption, and as a result, there is a growing demand for alternative techniques that offer higher H purity and energy efficiency. Membrane separation has emerged as a promising approach for obtaining high-purity H gas with low energy consumption.

No safe place for war survivors: War memory, event exposure, and migrants' psychological trauma.

The present study explores the concept of reenactment of known and unknown war trauma that may be unfamiliar to the readers while also opening up new discourses of understanding and empathy through the lens of Cathy Caruth's trauma theory by focusing on the novel by Atia Abawi. War fiction, such as Abawi's novel, highlights the concept of psychological trauma as a double wound (known as "outsiders" and unknown as "insiders") through the textual analysis and characterization of characters by presenting their haunting pasts, present lives, and losses concerning traumatic events. The present study also recounts what the trauma of the unknown means to war-torn survivors by focusing on "trauma as double wounds" from three aspects: cause, effects, and recuperation.

Traumatic chain: Korean-American immigrants' transgenerational language and racial trauma in .

The premise of this study is to look at the intergenerational transferal of language and racial trauma of Asian immigrants in general and Korean-American immigrants in particular to a western country, the United States of America. This study investigates trauma from a psychological standpoint, based on Chang-Rae Lee's novel Native Speaker. In describing a marker of citizenship, the novel's title also points to who is the native language speaker and who is a native of a country, and why one who is not may be excluded.

Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO.

Detection, monitoring, and analysis of ethanol are important in various fields such as health care, food industries, and safety control. In this study, we report that a solid electrolyte gas sensor based on a proton-conducting membrane is promising for detecting ethanol in air. We focused on graphene oxide (GO) as a new solid electrolyte because it shows a high proton conductivity at room temperature.

Graphene-based carbocatalysts for carbon-carbon bond formation.

Organic transformations are usually catalyzed by metal-based catalysts. In contrast, metal-free catalysts have attracted considerable attention from the viewpoint of sustainability and safety. Among the studies in metal-free catalysis, graphene-based materials have been introduced in the reactions that are usually catalyzed by transition metal catalysts.

Selective Hydrogenation by Carbocatalyst: The Role of Radicals.

The selective hydrogenation of the nitro moiety is a difficult task in the presence of other reducible functional groups such as alkenes or alkynes. We show that the carbon-based (metal-free) catalyst can be used to selectively reduce substituted nitro groups using H as a reducing agent, providing a great potential to replace noble-metal catalysts and contributing to simple and greener strategies for organic synthesis.