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Sodium Cation Substitution in Sr2KTa5O15 toward Enhancement of Photocatalytic Conversion of CO2 Using H2O as an Electron Donor
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1021/acsomega.7b01305
Zeai Huang 1 , Sumika Yoshizawa 1 , Kentaro Teramura 1 , Hiroyuki Asakura 1 , Saburo Hosokawa 1 , Tsunehiro Tanaka 1
Affiliation  

The K and Sr cations (K+ and Sr2+) in a Sr2KTa5O15 photocatalyst were found to be easily substituted by Na cations (Na+) to form SrxKyNazTa5O15 by a facile one-pot flux method using a mixture of potassium chloride (KCl) and sodium chloride (NaCl). SrxKyNazTa5O15 fabricated using a mixture of KCl and NaCl with a Ag cocatalyst showed enhanced photocatalytic activity without apparent change in selectivity toward CO for the photocatalytic conversion of CO2 using H2O. The present study demonstrates that the flux treatment significantly affected the phase, morphology, band gap, and surface Sr composition of the catalyst owing to the substitution of K+ and Sr2+ for Na+. The stability and durability of the catalyst were also enhanced as compared to those of the photocatalyst fabricated using only KCl flux due to more stable Ag on the surface of SrxKyNazTa5O15.

中文翻译:

Sr 2 KTa 5 O 15中的钠阳离子取代,以使用H 2 O作为电子给体来增强CO 2的光催化转化

发现Sr 2 KTa 5 O 15光催化剂中的K和Sr阳离子(K +和Sr 2+)很容易被Na阳离子(Na +)取代,从而容易地形成Sr x K y Na z Ta 5 O 15。一锅通量法,使用氯化钾(KCl)和氯化钠(NaCl)的混合物。Sr x K y Na z Ta 5 O 15KCl和NaCl与Ag助催化剂的混合物制备的H2O表现出增强的光催化活性,而对H 2 O进行CO 2的光催化转化的对CO的选择性没有明显变化。K +和Sr 2+代替Na +引起的带隙和催化剂表面Sr组成。与仅使用KCl助熔剂制造的光催化剂相比,由于Sr x K y Na z Ta 5 O表面上的Ag更稳定,与之相比,该催化剂的稳定性和耐久性也得到了提高。15
更新日期:2017-11-20
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