实验室前期搭建太阳能有序转化系统,利用太阳辐射高频波段合成碳氢燃料,低频波段转化为高品质热能。基于该系统,制备Au和MgO负载的TiO2球壳材料,进行光热协同反应转化CO2和H2O,同时结合集热层利用导热油集热,结果表明,H2、CH4、CO产量分别为30.1、3.2、30.9 μmol/g,系统集热效率可达39.85%。实验结合表征显示,球壳结构、Au和MgO共负载可提高材料光吸收,增强光热性能,降低电子空穴对复合率,产生氧空位,促进光热协同反应还原CO2。
Abstract
The solar energy orderly conversion system has been set up to synthesize hydrocarbon fuel with the high-frequency solar radiation and the low-frequency part is converted into high temperature thermal energy. Based on this system, TiO2 spherical shell materials loaded with Au and MgO are prepared to transform CO2 and H2O through photothermal chemical reaction, and thermal of heat-collection layer is collected by thermal oil. The results show that H2, CH4 and CO yield are 30.1, 3.2 and 30.9 μmol/g respectively, and the heat collection efficiency of the system is 39.85%. The characterization results indicate that the spherical shell structure, Au and MgO co-loading improves the light absorption, enhances the photothermal properties, reduces the recombination rate of electron hole pair, generates oxygen vacancies, and promotes the photothermal chemical reaction to reduce CO2.
关键词
太阳能有序转化 /
光热协同反应 /
集热 /
CO2还原
Key words
solar energy orderly conversion /
photothermal chemical reaction /
heat collection /
carbon dioxide reduction
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] LOW J X, CHENG B, YU J G.Surface modification and enhanced photocatalytic CO2 reduction performance of TiO2: a review[J]. Applied surface science, 2017, 392: 658-686.
[2] CHENG W H, RICHTER M H, SULLIVAN I, et al.CO2 reduction to CO with 19% efficiency in a solar-driven gas diffusion electrode flow cell under outdoor solar illumination[J]. ACS energy letters, 2020, 5(2): 470-476.
[3] XU C Y, HUANG W H, LI Z, et al.Photothermal coupling factor achieving CO2 reduction based on palladium-nanoparticle-loaded TiO2[J]. ACS catalysis, 2018, 8(7): 6582-6593.
[4] ZHANG F, LI Y H, QI M Y, et al.Photothermal catalytic CO2 reduction over nanomaterials[J]. Chem catalysis, 2021, 1(2): 272-297.
[5] HONG J N, XU C Y, DENG B W, et al.Photothermal chemistry based on solar energy: from synergistic effects to practical applications[J]. Advanced science, 2022, 9(3): 2103926.
[6] 秦宏宇, 柯义虎, 李景云, 等. 光热协同效应在催化反应中的应用研究进展[J]. 分子催化, 2021, 35(4): 375-389.
QIN H Y, KE Y H, LI J Y, et al.Application of photo-thermal synergistic effect in catalytic reactions[J]. Journal of molecular catalysis (China), 2021, 35(4): 375-389.
[7] 张遵恒. 基于槽式聚光的光热反应与集热协同实验研究[D]. 杭州: 浙江大学, 2021.
ZHANG Z H.Synergy experimental study on photo-thermal reaction and heat collection based on trough concentrator [D]. Hangzhou: Zhejiang University, 2021.
[8] DING Y, XIA X, CHEN W C, et al.Inside-out Ostwald ripening: a facile process towards synthesizing anatase TiO2 microspheres for high-efficiency dye-sensitized solar cells[J]. Nano research, 2016, 9(7): 1891-1903.
[9] HUANG W H, ZHANG L, LI Z, et al.Efficient CO2 reduction with H2O via photothermal chemical reaction based on Au-MgO dual catalytic site on TiO2[J]. Journal of CO2 utilization, 2022, 55: 101801.
[10] ADHIKARI S, KIM D H.Heterojunction C3N4/MoO3 microcomposite for highly efficient photocatalytic oxidation of Rhodamine B[J]. Applied surface science, 2020, 511: 145595.
[11] ZHAO X X, YANG H, CUI Z M, et al.Synergistically enhanced photocatalytic performance of Bi4Ti3O12 nanosheets by Au and Ag nanoparticles[J]. Journal of materials science:materials in electronics, 2019, 30: 13785-13796.
[12] ZHAO H L, ZHENG X Y, FENG X H, et al.CO2 reduction by plasmonic Au nanoparticle-decorated TiO2 photocatalyst with an ultrathin Al2O3 interlayer[J]. The journal of physical chemistry C, 2018, 122(33): 18949-18956.
[13] LI Z, ZHANG X H, ZHANG L, et al.Pathway alteration of water splitting via oxygen vacancy formation on anatase titanium dioxide in photothermal catalysis[J]. The journal of physical chemistry C, 2020, 124(48): 26214-26221.
[14] CAI X T, WANG F, WANG R X, et al.Synergism of surface strain and interfacial polarization on Pd@Au core-shell cocatalysts for highly efficient photocatalytic CO2 reduction over TiO2[J]. Journal of materials chemistry A, 2020, 8(15): 7350-7359.
[15] TORRES J A, NOGUEIRA A E, DA SILVA G T S T, et al. Enhancing TiO2 activity for CO2 photoreduction through MgO decoration[J]. Journal of CO2 utilization, 2020, 35: 106-114.
基金
国家自然科学基金（51976190）; 浙江省自然科学基金（LR18E060001）
PDF(2299 KB)
