Lepidocrocite-Type Layered Titanate Nanoparticles as Photocatalysts for H2 Production
Lepidocrocite-Type Layered Titanate Nanoparticles as Photocatalysts for H2 Production
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DOI：
10.1021/acsanm.2c01353
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发表时间：
2022-06
影响因子：
5.9
通讯作者：
Kanji Saito;Kodai Inaguma;M. Ogawa;Phạm Thị Thu Hà;Hayato Akiyama;Shuhei Yamaguchi;Hiroyuki Minokoshi;Masataka Ogasawara;Sumio Kato
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文献类型：
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作者：
Kanji Saito;Kodai Inaguma;M. Ogawa;Phạm Thị Thu Hà;Hayato Akiyama;Shuhei Yamaguchi;Hiroyuki Minokoshi;Masataka Ogasawara;Sumio Kato
优化了K0.8Ti1.73Li0.27O4型层状锂钛酸钾光催化制氢的制备温度。K0.8Ti1.73Li0.27O4是在不同温度(600-1000℃)下通过固相反应制备的，然后用稀盐酸处理得到质子化形式的K0.8Ti1.73 Li0.27O4。随着制备温度的不同，K0.8Ti1.73Li0.27O4的颗粒大小和结晶度不同，质子化形式的K0.8Ti1.73Li0.27O4对甲醇水溶液制氢的光催化活性与制备温度相关。在700C下制备的K0.8Ti1.73Li0.27O4纳米粒子的氢气量最大，相当于在通常报道的温度(≥800℃)下合成的K0.8Ti1.73Li0.27O4的42倍。这一发现加强了制备温度对充分利用从陶瓷工艺衍生的纳米材料的能力的重要性。
The preparation temperature of lepidocrocite-type layered potassium lithium titanate with the formula K0.8Ti1.73Li0.27O4was optimized for photocatalytic H2production. K0.8Ti1.73Li0.27O4was prepared by solid-state reactions at varied temperatures (600–1000 °C) and subsequently treated with dilute HCl to obtain its protonated form. Depending on the preparation temperature, the particle size and crystallinity of K0.8Ti1.73Li0.27O4varied, and the photocatalytic activity of the protonated forms of K0.8Ti1.73Li0.27O4for H2production from aqueous methanol solution was correlated with the preparation temperature. K0.8Ti1.73Li0.27O4nanoparticles prepared at 700 °C with a particle size estimated to be within the range of ca. 100–300 nm gave the largest amount of H2, equivalent up to 42 times higher than that given by K0.8Ti1.73Li0.27O4prepared at commonly reported temperatures (≥800 °C). This finding reinforces the importance of preparation temperature to full utilization of the capabilities of nanomaterials derived from ceramic processes.