Formaldehyde(HCHO) is one kind of common indoor toxic pollutant,the catalytic oxidation degradation of formaldehyde at room temperature is desired.In this work,a new single atomic catalyst(SAC),Al doped graphene,for t...Formaldehyde(HCHO) is one kind of common indoor toxic pollutant,the catalytic oxidation degradation of formaldehyde at room temperature is desired.In this work,a new single atomic catalyst(SAC),Al doped graphene,for the catalytic oxidation of HCHO molecules was proposed through density function theory(DFT) calculations.It is found that Al atoms can be adsorbed on graphene stably without aggre s sion.Then HCHO can be effectively oxidized into CO2 and H2 O in the presence of O2 molecules on Al doped graphene with a low energy barrier of 0.82 eV and releasing energy of 2.29 eV with the pathway of HCHO→HCOOH→CO→CO2.The oxidation reaction can happen promptly with reaction time τ=56.9 s at the speed control step at room temperature.Therefore,this work proposed a high-performance catalyst Al-doped graphene without any noble metal for HCHO oxidation at ambient temperature,and corresponding oxidation pathway and mechanism are also deeply understood.展开更多
A hiatal hernia(HH)is usually associated with gastroesophageal reflux disease(GERD).An HH can increase the incidence of GERD.[1]The coexistence of these diseases increases the difficulty of treatment and can be challe...A hiatal hernia(HH)is usually associated with gastroesophageal reflux disease(GERD).An HH can increase the incidence of GERD.[1]The coexistence of these diseases increases the difficulty of treatment and can be challenging for endoscopic treatment.Therapeutic methods for small HHs(≤2 cm)combined with refractory GERD have recently been emerging.However,there are still knowledge gaps in the endoscopic treatment of large HHs(≥3cm)combined with refractory GERD.We developed a new endoscopic method called hiatal hernia-endoscopic submucosal dissection(HH-ESD)and performed the present study to clarify the efficacy and safety of HH-ESD.展开更多
基金National Natural Science Foundation of China (Nos.21777033,21607029 and 41425015)Science and Technology Planning Project of Guangdong Province (No. 2017B020216003)the Innovation Team Project of Guangdong Provincial Department of Education (No.2017KCXTD012)。
文摘Formaldehyde(HCHO) is one kind of common indoor toxic pollutant,the catalytic oxidation degradation of formaldehyde at room temperature is desired.In this work,a new single atomic catalyst(SAC),Al doped graphene,for the catalytic oxidation of HCHO molecules was proposed through density function theory(DFT) calculations.It is found that Al atoms can be adsorbed on graphene stably without aggre s sion.Then HCHO can be effectively oxidized into CO2 and H2 O in the presence of O2 molecules on Al doped graphene with a low energy barrier of 0.82 eV and releasing energy of 2.29 eV with the pathway of HCHO→HCOOH→CO→CO2.The oxidation reaction can happen promptly with reaction time τ=56.9 s at the speed control step at room temperature.Therefore,this work proposed a high-performance catalyst Al-doped graphene without any noble metal for HCHO oxidation at ambient temperature,and corresponding oxidation pathway and mechanism are also deeply understood.
基金China’s Inner Mongolia Autonomous Region Applied Technology Research and Development Funding Plan(No.201802160)。
文摘A hiatal hernia(HH)is usually associated with gastroesophageal reflux disease(GERD).An HH can increase the incidence of GERD.[1]The coexistence of these diseases increases the difficulty of treatment and can be challenging for endoscopic treatment.Therapeutic methods for small HHs(≤2 cm)combined with refractory GERD have recently been emerging.However,there are still knowledge gaps in the endoscopic treatment of large HHs(≥3cm)combined with refractory GERD.We developed a new endoscopic method called hiatal hernia-endoscopic submucosal dissection(HH-ESD)and performed the present study to clarify the efficacy and safety of HH-ESD.
