It is necessary to synthesize new material for the advancements of the technology. In this study, new and novel poly(2-anisidine)@zirconium tungstate(P2A/ZrW_2O_8) was synthesized by simple so-gel method. Physicochemi...It is necessary to synthesize new material for the advancements of the technology. In this study, new and novel poly(2-anisidine)@zirconium tungstate(P2A/ZrW_2O_8) was synthesized by simple so-gel method. Physicochemical characterization of P2A/ZrW_2O_8 was done by thermogravimetric analysis(TGA), scanning electron microscopy(SEM), X-ray powder diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), ion exchange and simultaneous four probe dc conductivity studies. The conductivity study revealed its highly semiconducting nature, in the range of 10^(-1)–10^(-2) S·cm^(-1). Ion-exchange capabilities of the composite make it applicable for cation-exchange studies. The result of distribution studies(Kd) revealed its selectivity towards Cd^(2+) compared to other metal ions. This property of the composite was utilized for designing Cd^(2+) selective membrane electrode. Several important physical parameters of the ion-selective electrode were determined, such as Nernstian slope(32.32 mV·decade^(-1)), working pH range was 2.0–4.0 and response time was found ～ 17 s.The analytical utility of this wave like composite membrane electrode was as, indicator electrode in various potentiometric titrations.展开更多
A new series of visible light responsive and water-stable inorganic-organic-inorganic hybrid materials such as polyoxometalate(POM)and polyhedral oligomeric silsesquioxanes(POSS)with different metals was prepared,and ...A new series of visible light responsive and water-stable inorganic-organic-inorganic hybrid materials such as polyoxometalate(POM)and polyhedral oligomeric silsesquioxanes(POSS)with different metals was prepared,and these materials include{[PW_(12)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(3)(POM(W)-POSS),[PMo_(12)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(3)(POM(Mo)-POSS)and[PMo_(10)V_(2)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(5)(POM(MoV)-POSS)};these materials containing a cationic electron donor of amino-substituted POSS(POSS-NH_(2))on an anionic electron acceptor of POM have been developed for efficient and sustainable photocatalytic H_(2)production.It is interesting to note that the synthesized hybrid materials exhibit remarkable photocatalytic H_(2)production activities under visible-light irradiation.The maximum H_(2)production rate of 485μmol h^(-1)g^(-1)is achieved using POM with heterometallic sites,i.e.,(MoV)-POSS rather than that having homometallic sites.The enhanced photocatalytic H_(2)production is mainly due to improved charge carrier separation by electron-deficient metal sites and a red shift in the absorption,as revealed from photoluminescence and UV-vis spectra.Importantly,POM-POSS hybrid materials demonstrate excellent water stability during photocatalysis due to the hydrophobicity of the hybrid materials,which results from the integration of hydrophobic POSS-NH_(2)with POMs in contrast to free POMs.Additionally,the successful integration of POSS-NH_(2)into POMs is confirmed using FT-IR,NMR,ESI mass spectroscopy,and elemental and thermogravimetric analyses.The present study may open new possibilities in the design and development of stable POM organic/inorganic hybrid materials for solar energy conversion applications.展开更多
The authors regret the presence of some errors within the article.The corrected versions of the text are detailed below.On the third page,within the section Synthesis and characterization of POM-POSS hybrid materials.
文摘It is necessary to synthesize new material for the advancements of the technology. In this study, new and novel poly(2-anisidine)@zirconium tungstate(P2A/ZrW_2O_8) was synthesized by simple so-gel method. Physicochemical characterization of P2A/ZrW_2O_8 was done by thermogravimetric analysis(TGA), scanning electron microscopy(SEM), X-ray powder diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), ion exchange and simultaneous four probe dc conductivity studies. The conductivity study revealed its highly semiconducting nature, in the range of 10^(-1)–10^(-2) S·cm^(-1). Ion-exchange capabilities of the composite make it applicable for cation-exchange studies. The result of distribution studies(Kd) revealed its selectivity towards Cd^(2+) compared to other metal ions. This property of the composite was utilized for designing Cd^(2+) selective membrane electrode. Several important physical parameters of the ion-selective electrode were determined, such as Nernstian slope(32.32 mV·decade^(-1)), working pH range was 2.0–4.0 and response time was found ～ 17 s.The analytical utility of this wave like composite membrane electrode was as, indicator electrode in various potentiometric titrations.
基金support from the DST/SERB government of India(Grant No.YSS/2014/000288)。
文摘A new series of visible light responsive and water-stable inorganic-organic-inorganic hybrid materials such as polyoxometalate(POM)and polyhedral oligomeric silsesquioxanes(POSS)with different metals was prepared,and these materials include{[PW_(12)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(3)(POM(W)-POSS),[PMo_(12)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(3)(POM(Mo)-POSS)and[PMo_(10)V_(2)O_(4)0][(NH_(3)CH_(2)CH_(2)CH_(2))(iBu)_(7)Si_(8)O_(12)]_(5)(POM(MoV)-POSS)};these materials containing a cationic electron donor of amino-substituted POSS(POSS-NH_(2))on an anionic electron acceptor of POM have been developed for efficient and sustainable photocatalytic H_(2)production.It is interesting to note that the synthesized hybrid materials exhibit remarkable photocatalytic H_(2)production activities under visible-light irradiation.The maximum H_(2)production rate of 485μmol h^(-1)g^(-1)is achieved using POM with heterometallic sites,i.e.,(MoV)-POSS rather than that having homometallic sites.The enhanced photocatalytic H_(2)production is mainly due to improved charge carrier separation by electron-deficient metal sites and a red shift in the absorption,as revealed from photoluminescence and UV-vis spectra.Importantly,POM-POSS hybrid materials demonstrate excellent water stability during photocatalysis due to the hydrophobicity of the hybrid materials,which results from the integration of hydrophobic POSS-NH_(2)with POMs in contrast to free POMs.Additionally,the successful integration of POSS-NH_(2)into POMs is confirmed using FT-IR,NMR,ESI mass spectroscopy,and elemental and thermogravimetric analyses.The present study may open new possibilities in the design and development of stable POM organic/inorganic hybrid materials for solar energy conversion applications.
文摘The authors regret the presence of some errors within the article.The corrected versions of the text are detailed below.On the third page,within the section Synthesis and characterization of POM-POSS hybrid materials.
