为了解决大面积BDD电极的实际应用问题,设计了基于大面积BDD电极的水处理器,确定了反应器的类型为箱式循环式反应器,电极联结方式为单极式,液路连接为并联液路。为了使水处理器具有更好的通用性,设计电解槽中用于固定电极的卡槽长度超过...为了解决大面积BDD电极的实际应用问题,设计了基于大面积BDD电极的水处理器,确定了反应器的类型为箱式循环式反应器,电极联结方式为单极式,液路连接为并联液路。为了使水处理器具有更好的通用性,设计电解槽中用于固定电极的卡槽长度超过100 mm,可以同时放置2块50 mm×100 mm×2 mm的电极构成更大面积的100 mm×100 mm×2 mm电极。对设计的电解槽进行仿真,研究了500 m L/min和800 m L/min 2种不同流量条件下电解槽内水的流线、流速和温度。仿真结果发现,当流量为800 m L/min时,水流在电解槽内形成的涡流少,水流停滞少,并且出口处的水温不高,水流不断带走电极上的温度,系统散热很好。展开更多
Boron doped diamond(BDD)performs well in electrochemical oxidation for organic pollutants thanks to its wide electrochemical window and superior chemical stability.We presented a method to obtain well-adherent large-s...Boron doped diamond(BDD)performs well in electrochemical oxidation for organic pollutants thanks to its wide electrochemical window and superior chemical stability.We presented a method to obtain well-adherent large-scale BDD/Nb electrode by the modified hot filament chemical vapor deposition system(HFCVD).SiC particles were sand blasted to enhance the adhesion of BDD coating.The BDD coating was then deposited on both sides of Nb which was placed vertically and closely with filament grids on both sides.The BDD/Nb electrodes had no deformation because the thermal deformations of the BDD films on both sides of the Nb substrate conteracted each other during cooling process after deposition.The surface morphology and purity of the BDD/Nb electrode were analyzed by Raman and scanning elestron microscope(SEM)techniques.Scratch test was used to investigate the adhesion of BDD films.The electrochemical performances were measured by cyclic voltammetry test.The BDD electrode at the B/C ratio of 2 000×10^(-6) held a higher oxygen evolution potential thanks to its high sp3 carbon content.Accelerated life test illustrated that the sandblasting pretreatment obviously enhanced the adhesion of BDD coating which resulted in a longer service duration than the un-sandblasted one.展开更多
文摘为了解决大面积BDD电极的实际应用问题,设计了基于大面积BDD电极的水处理器,确定了反应器的类型为箱式循环式反应器,电极联结方式为单极式,液路连接为并联液路。为了使水处理器具有更好的通用性,设计电解槽中用于固定电极的卡槽长度超过100 mm,可以同时放置2块50 mm×100 mm×2 mm的电极构成更大面积的100 mm×100 mm×2 mm电极。对设计的电解槽进行仿真,研究了500 m L/min和800 m L/min 2种不同流量条件下电解槽内水的流线、流速和温度。仿真结果发现,当流量为800 m L/min时,水流在电解槽内形成的涡流少,水流停滞少,并且出口处的水温不高,水流不断带走电极上的温度,系统散热很好。
基金supported by the National Natural Science Foundation of China(Nos.51575269,51275232)the Six Talent Peaks Project in Jiangsu Province(No.ZBZZ005)the Zhejiang Provincial Key Laboratory for Cutting Tools(No.ZD201305)
文摘Boron doped diamond(BDD)performs well in electrochemical oxidation for organic pollutants thanks to its wide electrochemical window and superior chemical stability.We presented a method to obtain well-adherent large-scale BDD/Nb electrode by the modified hot filament chemical vapor deposition system(HFCVD).SiC particles were sand blasted to enhance the adhesion of BDD coating.The BDD coating was then deposited on both sides of Nb which was placed vertically and closely with filament grids on both sides.The BDD/Nb electrodes had no deformation because the thermal deformations of the BDD films on both sides of the Nb substrate conteracted each other during cooling process after deposition.The surface morphology and purity of the BDD/Nb electrode were analyzed by Raman and scanning elestron microscope(SEM)techniques.Scratch test was used to investigate the adhesion of BDD films.The electrochemical performances were measured by cyclic voltammetry test.The BDD electrode at the B/C ratio of 2 000×10^(-6) held a higher oxygen evolution potential thanks to its high sp3 carbon content.Accelerated life test illustrated that the sandblasting pretreatment obviously enhanced the adhesion of BDD coating which resulted in a longer service duration than the un-sandblasted one.
