Natural water bodies often contain a significant amount of suspended colloidal particles,which not only reduce water transparency but also have a high adsorption capacity for soluble pollutants.These composite polluta...Natural water bodies often contain a significant amount of suspended colloidal particles,which not only reduce water transparency but also have a high adsorption capacity for soluble pollutants.These composite pollutants can migrate rapidly with water flow,which are usually difficult to degrade and remove by traditional methods.Aiming at suspended contaminated waterbodies,this study introduced a multilevel loading method to prepare carbon nanotube/sulfur doped carbon nitride(CNT/SCN)composite photocatalytic purification beads.The surface of the obtained core-shell structured purification beads is loaded with CNT/SCN photocatalysts which exhibit three-dimensional conductive and porous characteristics.TC–HCl was introduced as the target pollutant,and the removal efficiency of the composite purification beads under different water turbidity and hydrodynamic conditions were investigated.The results showed that during 15 h of degradation process,at the depth of 20 cm,with the flow rate of 0.015 m^(3)/h and water turbidity of 10.3 NTU,the purification beads achieved a removal efficiency of 54.9%for tetracycline hydrochloride(TC–HCl),which was 2.03 times higher than that of SCN purification beads.The three-dimensional porous structure of the surface exhibited excellent adsorption and trapping capabilities for suspended colloidal particles.The introduction of carbon nanotubes enhanced charge transfer ability of the surface layer and reduces the local charge accumulation effect caused by surface adsorption,which effectively enhances the adsorption of suspended colloid,and also significantly improved the degradation efficiency of TC–HCl.This study provides a valuable insight for the engineering application of photocatalytic technology.展开更多
路由信息协议(Routing Information Protocol,RIP)是中小型计算机网络常用的路由协议,也是一种重要的基于距离矢量(Distance-Vector)算法的路由协议。本文利用华三HCL(H3C Cloud Lab)网络仿真软件,设计环状拓扑结构实验网络,配置网络路...路由信息协议(Routing Information Protocol,RIP)是中小型计算机网络常用的路由协议,也是一种重要的基于距离矢量(Distance-Vector)算法的路由协议。本文利用华三HCL(H3C Cloud Lab)网络仿真软件,设计环状拓扑结构实验网络,配置网络路由协议RIP,抓取RIP数据报文,跟踪分析网络路由环路生成。通过实验及协议数据报分析,观察路由环路动态变化,有助于深入理解RIP防止路由环路机制,提高路由故障排查能力。展开更多
Reducing the cost of RuO_(2)/TiO_(2)catalysts is still one of the urgent challenges in catalytic HCl oxidation.In the present work,a Ce-doped TiO_(2)supported RuO_(2)catalyst with a low Ru loading was developed,showin...Reducing the cost of RuO_(2)/TiO_(2)catalysts is still one of the urgent challenges in catalytic HCl oxidation.In the present work,a Ce-doped TiO_(2)supported RuO_(2)catalyst with a low Ru loading was developed,showing a high activity in the catalytic oxidation of HCl to Cl_(2).The results on some extensive characterizations of both Ce-doped TiO_(2)carriers and their supported RuO_(2)catalysts show that the doping of Ce into TiO_(2)can effectively change the lattice parameters of TiO_(2)to improve the dispersion of the active RuO_(2)species on the carrier,which facilitates the production of surface Ru species to expose more active sites for boosting the catalytic performance even under some harsh reaction conditions.This work provides some scientific basis and technical support for chlorine recycling.展开更多
为探究HCl对费托合成钴基催化剂的中毒机制,采用HSC Chemistry 5.0软件对200℃~350℃范围内钴基催化剂HCl中毒热力学进行模拟计算。结果表明:钴基催化剂与HCl单独存在或与CO共存会引起中毒,其中毒产物以CoCl2为主;费托合成钴基催化剂中,...为探究HCl对费托合成钴基催化剂的中毒机制,采用HSC Chemistry 5.0软件对200℃~350℃范围内钴基催化剂HCl中毒热力学进行模拟计算。结果表明:钴基催化剂与HCl单独存在或与CO共存会引起中毒,其中毒产物以CoCl2为主;费托合成钴基催化剂中,HCl不会对载体SiO2产生影响。In order to investigate the poisoning mechanism of HCl on cobalt-based catalysts for Fischer-Tropsch synthesis, the thermodynamics of HCl poisoning of cobalt-based catalysts in the temperature range of 200˚C~350˚C was simulated by using HSC Chemistry 5.0 software. The results showed that coexistence of cobalt-based catalysts with HCl alone or with CO would be poisoned, and its toxic product was dominated by CoCl2;HCl would not affect SiO2 in Fischer-Tropsch synthesised cobalt-based catalysts.展开更多
基金supported by the Key Programof National Nat-ural Science Foundation of China(No.92047201)the National Natural Science Foundation of China(No.92047303)the Na-tional Science Funds for Creative Research Groups of China(No.51421006).
文摘Natural water bodies often contain a significant amount of suspended colloidal particles,which not only reduce water transparency but also have a high adsorption capacity for soluble pollutants.These composite pollutants can migrate rapidly with water flow,which are usually difficult to degrade and remove by traditional methods.Aiming at suspended contaminated waterbodies,this study introduced a multilevel loading method to prepare carbon nanotube/sulfur doped carbon nitride(CNT/SCN)composite photocatalytic purification beads.The surface of the obtained core-shell structured purification beads is loaded with CNT/SCN photocatalysts which exhibit three-dimensional conductive and porous characteristics.TC–HCl was introduced as the target pollutant,and the removal efficiency of the composite purification beads under different water turbidity and hydrodynamic conditions were investigated.The results showed that during 15 h of degradation process,at the depth of 20 cm,with the flow rate of 0.015 m^(3)/h and water turbidity of 10.3 NTU,the purification beads achieved a removal efficiency of 54.9%for tetracycline hydrochloride(TC–HCl),which was 2.03 times higher than that of SCN purification beads.The three-dimensional porous structure of the surface exhibited excellent adsorption and trapping capabilities for suspended colloidal particles.The introduction of carbon nanotubes enhanced charge transfer ability of the surface layer and reduces the local charge accumulation effect caused by surface adsorption,which effectively enhances the adsorption of suspended colloid,and also significantly improved the degradation efficiency of TC–HCl.This study provides a valuable insight for the engineering application of photocatalytic technology.
文摘路由信息协议(Routing Information Protocol,RIP)是中小型计算机网络常用的路由协议,也是一种重要的基于距离矢量(Distance-Vector)算法的路由协议。本文利用华三HCL(H3C Cloud Lab)网络仿真软件,设计环状拓扑结构实验网络,配置网络路由协议RIP,抓取RIP数据报文,跟踪分析网络路由环路生成。通过实验及协议数据报分析,观察路由环路动态变化,有助于深入理解RIP防止路由环路机制,提高路由故障排查能力。
基金supported by Zhejiang Provincial Key R&D Project(No.2021C01056)the Programme of Introducing Talents of Discipline to Universities(No.D17008).
文摘Reducing the cost of RuO_(2)/TiO_(2)catalysts is still one of the urgent challenges in catalytic HCl oxidation.In the present work,a Ce-doped TiO_(2)supported RuO_(2)catalyst with a low Ru loading was developed,showing a high activity in the catalytic oxidation of HCl to Cl_(2).The results on some extensive characterizations of both Ce-doped TiO_(2)carriers and their supported RuO_(2)catalysts show that the doping of Ce into TiO_(2)can effectively change the lattice parameters of TiO_(2)to improve the dispersion of the active RuO_(2)species on the carrier,which facilitates the production of surface Ru species to expose more active sites for boosting the catalytic performance even under some harsh reaction conditions.This work provides some scientific basis and technical support for chlorine recycling.
文摘为探究HCl对费托合成钴基催化剂的中毒机制,采用HSC Chemistry 5.0软件对200℃~350℃范围内钴基催化剂HCl中毒热力学进行模拟计算。结果表明:钴基催化剂与HCl单独存在或与CO共存会引起中毒,其中毒产物以CoCl2为主;费托合成钴基催化剂中,HCl不会对载体SiO2产生影响。In order to investigate the poisoning mechanism of HCl on cobalt-based catalysts for Fischer-Tropsch synthesis, the thermodynamics of HCl poisoning of cobalt-based catalysts in the temperature range of 200˚C~350˚C was simulated by using HSC Chemistry 5.0 software. The results showed that coexistence of cobalt-based catalysts with HCl alone or with CO would be poisoned, and its toxic product was dominated by CoCl2;HCl would not affect SiO2 in Fischer-Tropsch synthesised cobalt-based catalysts.
