Tuning the Photocatalytic Activity of Layered Perovskite Niobates by Controlled Ion Exchange and Hydration

Dion-Jacobson type layered perovskite niobium oxides KCa2Nb3O10 and KSr2Nb3O10 were prepared via molten salt method, and the potassium cations were exchanged by protons using nitric acid. Different degrees of proton exchange were adjusted, and the dependence of photocatalytic activity for hydrogen evolution on proton exchange was investigated. Moreover, proton exchange leads to different amounts of water incorporated into the interlayer spaces, also influencing photocatalytic performance significantly. Decoupling water intercalation and proton exchange, the photocatalytic activity of proton exchanged KCa2Nb3O10 and KSr2Nb3O10 can be revealed and tailored for maximum activity.

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Tailoring the photocatalytic activity of layered perovskites by opening the interlayer vacancy via ion-exchange reactions

CrystEngComm ◽

10.1039/c5ce01582k ◽

2015 ◽

Vol 17 (45) ◽

pp. 8703-8709 ◽

Cited By ~ 6

Author(s):

Yingqi Wang ◽

Xiaofang Lai ◽

Xujie Lü ◽

Yanting Li ◽

Qinglong Liu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Ion Exchange ◽

Exchange Reaction ◽

Underlying Mechanism ◽

Effective Model ◽

Layered Perovskite ◽

Exchange Reactions ◽

Ion Exchange Reaction ◽

Improved Performance ◽

Layered Perovskites

The photocatalytic activity of the layered perovskite K2La2Ti3O10 was regulated by an ion-exchange reaction with a series of cations – Ca2+, Sr2+, and Ba2+. The underlying mechanism of the improved performance and an effective model for designing the photocatalyst were discussed.

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Photocatalytic activity of CdS nanoparticles synthesized by a facile composite molten salt method

Applied Surface Science ◽

10.1016/j.apsusc.2011.12.116 ◽

2012 ◽

Vol 258 (10) ◽

pp. 4370-4376 ◽

Cited By ~ 54

Author(s):

Xiaoyan Li ◽

Chenguo Hu ◽

Xue Wang ◽

Yi Xi

Keyword(s):

Photocatalytic Activity ◽

Molten Salt ◽

Cds Nanoparticles ◽

Molten Salt Method

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Enhanced visible light photocatalytic performance of crystalline g-C3N4 nanosheets by one-step molten salt method

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2022.109209 ◽

2022 ◽

pp. 109209

Author(s):

Xin Yan ◽

Bingbing Kang ◽

Tao Ai ◽

Zhuo Li ◽

Yanhui Niu

Keyword(s):

Visible Light ◽

Molten Salt ◽

Photocatalytic Performance ◽

Molten Salt Method ◽

One Step ◽

Visible Light Photocatalytic

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Facile synthesis of Bi5O7NO3 with enhanced photocatalytic activity by a molten salt strategy and its photocatalytic performance

Chemical Physics Letters ◽

10.1016/j.cplett.2020.137178 ◽

2020 ◽

Vol 745 ◽

pp. 137178

Author(s):

Zhuowu Zhen ◽

Yiqun Deng ◽

Hui Yang ◽

Quan Sheng ◽

Tongxiang Liang

Keyword(s):

Photocatalytic Activity ◽

Molten Salt ◽

Photocatalytic Performance ◽

Facile Synthesis

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Photocatalytic Performance of Barium-Doped Strontium Tantalate

Materials Science Forum ◽

10.4028/www.scientific.net/msf.534-536.1481 ◽

2007 ◽

Vol 534-536 ◽

pp. 1481-1484 ◽

Cited By ~ 4

Author(s):

Asuka Kozu ◽

Hirotaka Fujimori ◽

Ki Young Kim ◽

Kazunori Oshiro ◽

Setsuo Yamamoto ◽

...

Keyword(s):

Photocatalytic Activity ◽

Solid Solubility ◽

Photocatalytic Performance ◽

Solubility Limit ◽

Photocatalytic Properties ◽

Layered Perovskite ◽

Complex Method ◽

Solid Solubility Limit ◽

Perovskite Materials ◽

Ba Substitution

Sr2Ta2O7, a layered perovskite compound, has been reported to possess most excellent photocatalytic properties among the layered perovskite materials. Recently, we have successfully demonstrated that Ba5Ta4O15 that was prepared under Ta rich atmosphere has high photocatalytic performance as well as Sr2Ta2O7. In this study, several amount of Ba was doped into Sr2Ta2O7, and the photocatalyst samples with a mol ratio of Sr: Ba: Ta = (1-x): x: 1 were prepared by the polymerized complex method to investigate the effect of Ba substitution for the Sr site on photocatalytic activity. The maximum photocatalytic performance was obtained for x = 0.2 near the solid solubility limit, which is three times as high as that of undoped Sr2Ta2O7 and is in the highest level in a series of tantalum photocatalysts reported so far. The increase of photocatalytic activity would be caused by crystal distortion due to doping of Ba ion.

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