Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and...Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and quality. Therefore, it is necessary and urgent to develop approaches to controllably release the odorants as demanded. In this study, photo-driven mesoporous silica nanospheres loaded with sandela 803 was designed, prepared and named as S803@MS-S. S803@MS-S possessed ordered mesoporous, large specific surface area and pore volume. After adsorption of sandela 803, the S803@MSS was added into wallpaper to prepare fragrant wallpaper S803@MS-S-W. And this wallpaper exhibited excellent sustained and controlled release performances stimulated by light.展开更多
以Fe(CO)_(5)和含一个巯基的配体为原料,通过多步反应合成了两个新的[FeFe]氢化酶模拟物1和2;构建了以化合物1和2为光催化剂、藻红B钠盐(EBS^(2-))为光敏剂、三乙胺(TEA)为电子给体和质子源的三组分光催化产氢体系,该体系在pH值为12且...以Fe(CO)_(5)和含一个巯基的配体为原料,通过多步反应合成了两个新的[FeFe]氢化酶模拟物1和2;构建了以化合物1和2为光催化剂、藻红B钠盐(EBS^(2-))为光敏剂、三乙胺(TEA)为电子给体和质子源的三组分光催化产氢体系,该体系在pH值为12且体积比为1∶1的CH_(3)CN/H_(2)O溶液中,经可见光(λ>420 nm)照射4 h,最大产氢量为205.0μmol,相对于化合物2的催化转化数(TON)为51.4;研究表明,配体中含有较多的质子捕获位点,有利于形成产氢活性中间体H 2-2Fe2S(η2-H 2-Fe II Fe I)物种,从而提高催化剂的产氢活性,光生电子从1*EBS^(2-)化合物1和2的第一个电子的转移均为热力学可行过程,到化合物1和2的第二个电子转移是热力学不可行过程。展开更多
The gliding arc is an important approach to production of non-thermal plasma at atmospheric pressure, it can offer high-energy efficiency and high-electivity for chemical reactions. In this paper, the gliding arc driv...The gliding arc is an important approach to production of non-thermal plasma at atmospheric pressure, it can offer high-energy efficiency and high-electivity for chemical reactions. In this paper, the gliding arc driven by the transverse magnetic field is described and its velocity is measured by using a photo-multiplier. The mean velocity of the gliding arc increases with increasing magnetic induced-intensity, and its value varies from 7.8 m/s to 32 m/s.展开更多
基金financially supported by the National High Technology Research and Development Program (No. 2016YFA0200303)the Beijing Natural Science Foundation (No. L172046)+2 种基金the National Natural Science Foundation of China(Nos. 31522023, 51373177 and 51573188)the Beijing Municipal Science & Technology Commission (No. Z161100002616015)the "Strategic Priority Research Program Research Program" of the Chinese Academy of Sciences(No. XDA09030301-3)
文摘Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and quality. Therefore, it is necessary and urgent to develop approaches to controllably release the odorants as demanded. In this study, photo-driven mesoporous silica nanospheres loaded with sandela 803 was designed, prepared and named as S803@MS-S. S803@MS-S possessed ordered mesoporous, large specific surface area and pore volume. After adsorption of sandela 803, the S803@MSS was added into wallpaper to prepare fragrant wallpaper S803@MS-S-W. And this wallpaper exhibited excellent sustained and controlled release performances stimulated by light.
文摘以Fe(CO)_(5)和含一个巯基的配体为原料,通过多步反应合成了两个新的[FeFe]氢化酶模拟物1和2;构建了以化合物1和2为光催化剂、藻红B钠盐(EBS^(2-))为光敏剂、三乙胺(TEA)为电子给体和质子源的三组分光催化产氢体系,该体系在pH值为12且体积比为1∶1的CH_(3)CN/H_(2)O溶液中,经可见光(λ>420 nm)照射4 h,最大产氢量为205.0μmol,相对于化合物2的催化转化数(TON)为51.4;研究表明,配体中含有较多的质子捕获位点,有利于形成产氢活性中间体H 2-2Fe2S(η2-H 2-Fe II Fe I)物种,从而提高催化剂的产氢活性,光生电子从1*EBS^(2-)化合物1和2的第一个电子的转移均为热力学可行过程,到化合物1和2的第二个电子转移是热力学不可行过程。
文摘The gliding arc is an important approach to production of non-thermal plasma at atmospheric pressure, it can offer high-energy efficiency and high-electivity for chemical reactions. In this paper, the gliding arc driven by the transverse magnetic field is described and its velocity is measured by using a photo-multiplier. The mean velocity of the gliding arc increases with increasing magnetic induced-intensity, and its value varies from 7.8 m/s to 32 m/s.
