Soft template inducted hydrothermal BiYO3 catalysts for enhanced formic acid formation from the photocatalytic reduction of carbon dioxide
Soft template inducted hydrothermal BiYO3 catalysts for enhanced formic acid formation from the photocatalytic reduction of carbon dioxide
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DOI：
10.1039/c6ra03340g
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发表时间：
2016-05
期刊：
影响因子：
3.9
通讯作者：
Zuzeng Qin;H. Tian;Tongming Su;Hongbing Ji;Zhanhu Guo
中科院分区：
文献类型：
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作者：
Zuzeng Qin;H. Tian;Tongming Su;Hongbing Ji;Zhanhu Guo
以十二烷基苯磺酸钠（SDBS）、乙二胺四乙酸二钠（EDTA）和柠檬酸（CA）为软模板剂，采用水热法制备了BiYO3光催化剂。揭示了模板对BiYO3纳米结构的影响。在无模板和SDBS、EDTA和CA模板存在下制备的BiYO3纳米结构分别具有片状结构、薄片状、矩形板条结构和鳞片状均匀颗粒。在可见光照射下，这些合成的BiYO3纳米结构的光催化还原CO2进行了研究和比较。以EDTA为模板剂制备的BiYO3具有较大的比表面积、较高的吸附边和较低的带隙，在光催化还原CO2的过程中产生的羟基自由基（·OH）较少，甲酸（HCOOH）产率较高。由EDTA合成的BiYO3光催化还原CO2的HCOOH产率为1.68 μmol L−1，这是由无模板剂制备的BiYO3产生的HCOOH产率的1.9倍，是由固相反应制备的BiYO3的HCOOH产率的2.6倍。
Bismuth yttrium oxide (BiYO3) photocatalysts were hydrothermally prepared using sodium dodecyl benzene sulfonate (SDBS), disodium ethylenediamine tetraacetate (EDTA), and citric acid (CA) as soft templates. The effects of templates on the formed BiYO3 nanostructures were revealed. The BiYO3 nanostructures prepared without the existing template and with the existence of SDBS, EDTA, and CA as templates had flaked structures, sliced, rectangular lath structures with fine particles, and scaly uniform particles, respectively. The photocatalytic reduction of CO2 under visible-light irradiation with these synthesized BiYO3 nanostructures was studied and compared. Due to the larger specific surface area, higher adsorbed edge, and lower band gap, BiYO3 prepared using EDTA as a template produced fewer hydroxyl free radicals (·OH) to give a higher yield of formic acid (HCOOH) in the process of the photocatalytic reduction of CO2. The HCOOH yield from the photocatalytic reduction of CO2 by the EDTA synthesized BiYO3 was 1.68 μmol L−1, which was 1.9 times higher than that produced from BiYO3 prepared without a template, and 2.6 times higher than that of BiYO3 prepared by a solid-state reaction.