S型异质结Bi4O5Br2/CeO2的制备及其光催化CO2还原性能

doi:10.15541/jim20230003

摘要/Abstract

摘要：

光催化CO₂还原技术的关键是开发高效光催化剂, 而构建具有紧密界面结构的异质结是增强界面电荷转移, 实现高效光催化活性的有效途径。本研究采用静电纺丝技术结合水热法, 将Bi₄O₅Br₂纳米片镶嵌在CeO₂纳米纤维表面, 制得Bi₄O₅Br₂/CeO₂纤维光催化材料(B@C-x, x对应反应物的加入量)。利用不同方法表征其微观结构、形貌和光电性能。结果表明, 适当Bi₄O₅Br₂含量的Bi₄O₅Br₂/CeO₂异质结可以显著提高CeO₂纳米纤维的光催化性能。与纯Bi₄O₅Br₂和CeO₂相比, B@C-2在模拟太阳光下表现出最佳光催化活性, 不使用任何牺牲剂或共催化剂的条件下, CO生成速率达到8.26 μmol·h⁻¹·g⁻¹。这归因于Bi₄O₅Br₂和CeO₂之间的界面结合紧密以及构建的S型异质结, 使得光生载流子可以实现有效的空间分离和转移。本研究为定向合成Bi基S型异质结复合光催化材料提供了一种简便有效的方法, 为清洁能源转换探索了可行的途径。

关键词: Bi₄O₅Br₂/CeO₂复合纤维, 异质结, 光催化CO₂还原, 水热法

Abstract:

One of the basic challenges of CO₂ photoreduction is to develop efficient photocatalysts. As an effective strategy, constructing heterostructure photocatalysts with intimate interfaces can enhance interfacial charge transfer for realizing high photocatalytic activity. Herein, a novel photocatalytic material, Bi₄O₅Br₂/CeO₂ composite fiber (B@C-x, x refers to the amount of reactant), was constructed by embeding CeO₂ nanofibers on Bi₄O₅Br₂ nanosheets via an electrospinning combined with hydrothermal method. Its composition, morphology and photoelectric properties were characterized. The results show that Bi₄O₅Br₂/CeO₂ heterojunction with appropriate Bi₄O₅Br₂ content can significantly improve the photocatalytic performance of CeO₂ nanofibers. Compared with pure Bi₄O₅Br₂ and CeO₂, B@C-2 exhibited the best photocatalytic activity under simulated sunlight. The Bi₄O₅Br₂/CeO₂exhibited improved photocatalytic CO₂ reduction performance with a CO generation rate of 8.26 μmol·h⁻¹·g⁻¹ without using any sacrificial agents or noble co-catalysts. This can be attributed to the tight interfacial bonding between Bi₄O₅Br₂ and CeO₂ and the formation of S-scheme heterojunction, which enables the efficient spatial separation and transfer of photogenerated carriers. This work provides a simple and efficient method for directional synthesis of Bi-based photocatalytic composites with S-scheme heterojunction and illustrates an applicable tactic to develop potent photocatalysts for clean energy conversion.

Key words: Bi₄O₅Br₂/CeO₂ composite fiber, heterojunction, photocatalytic CO₂ reduction, hydrothermal method

中图分类号:

O643

李跃军, 曹铁平, 孙大伟. S型异质结Bi₄O₅Br₂/CeO₂的制备及其光催化CO₂还原性能[J]. 无机材料学报, 2023, 38(8): 963-970.

LI Yuejun, CAO Tieping, SUN Dawei. Bi₄O₅Br₂/CeO₂ Composite with S-scheme Heterojunction: Construction and CO₂ Reduction Performance[J]. Journal of Inorganic Materials, 2023, 38(8): 963-970.

图/表 7

图1 不同样品的(a)XRD谱图和(b)局部放大谱图

Fig. 1 (a) XRD patterns and (b) magnified patterns of different samples

图2 不同样品的XPS光谱图

Fig. 2 XPS spectra of different samples (a) Total survey; (b) Bi4f; (c) Br3d; (d) Ce3d

图3 不同样品的(a~d, f)SEM和(e)HRTEM照片

Fig. 3 (a-d, f) SEM and (e) HRTEM images of different samples (a) CeO2; (b) Bi4O5Br2; (c) B@C-1; (d, e) B@C-2; (f) B@C-4

图4 不同样品的(a)N2吸附-脱附等温线、孔径分布图(插图)和(b) CO2吸附曲线

Fig. 4 (a) N2 adsorption-desorption isotherms with inset showing pore-size distributions and (b) CO2 adsorption of different samples

图5 不同样品的光电性能

Fig. 5 Photoelectric performance of different samples (a) UV-Vis DRS spectra; (b) Tauc plots; (c) PL spectra; (d) Transient photocurrent responses; (e) EIS spectra; (f) M-S plots

图6 不同样品的光催化性能

Fig. 6 Photocatalytic performance of different samples (a) Photocatalytic CO2 reduction; (b) CO generation rate; (c) Stability test; (d) XRD patterns before and after 5 cycles photocatalyzation

图7 样品 B@C-2光催化CO2还原反应机理示意图

Fig. 7 Schematic mechanism of photocatalytic CO2 reduction of B@C-2 sample (a) Type Ⅱ heterojunction; (b) S-scheme heterojunction

参考文献 23

[1]	HUANG H N, SHI R, LI Z H, et al. Triphase photocatalytic CO₂reduction over silver-decorated titanium oxide at a gas-water boundary. Angewandte Chemie International Edition, 2022, 61(17): 202200802.
[2]	CHENG L, YUE X Y, FAN J J, et al. Site-specific electron-driving observations of CO₂-to-CH₄ photoreduction on Co-doped CeO₂/crystalline carbon nitride S-scheme heterojunctions. Advanced Materials, 2022, 34(27): 2200929.
[3]	FENG X H, PAN F P, TRAN B Z, et al. Photocatalytic CO₂ reduction on porous TiO₂ synergistically promoted by atomic layer deposited MgO vercoating and photodeposited silver nanoparticles. Catalysis Today, 2020, 339: 328. DOI URL
[4]	LIU Y, LI L L, LI Q L, et al. Fluorine doped porous boron nitride for efficient CO₂ capture and separation: a DFT study. Applied Surface Science, 2021, 556: 149775.
[5]	JI S F, QU Y, WANG T, et al. Rare-earth single erbium atoms for enhanced photocatalytic CO₂reduction. Angewandte Chemie International Edition, 2020, 59(26): 10651. DOI URL
[6]	WANG Z Q, ZHU J C, ZU X L, et al. Selective CO₂ photoreduction to CH₄via Pd^δ⁺-assisted hydrodeoxygenation over CeO₂ nanosheets. Angewandte Chemie International Edition, 2022, 61(30): 202203249.
[7]	XIA P F, CAO S W, ZHU B C, et al. Designing a 0D/2D S-scheme heterojunction over polymeric carbon nitride for visible-light photocatalytic inactivation of bacteria. Angewandte Chemie International Edition, 2020, 59(13): 5218. DOI URL
[8]	WANG T, CHEN L, CHEN C, et al. Enginneering catalytic interfaces in Cu^δ⁺/CeO₂-TiO₂ photocatalysts for synergistically boosting CO₂reduction to ethylene. ACS Nano, 2022, 16(2): 2306. DOI URL
[9]	MA R, ZHANG S, WEN T, et al. A critical review on visible- light-response CeO₂-based photocatalysts with enhanced photoxidation of organic pollutants. Catalysis Today, 2019, 335: 20. DOI URL
[10]	CHANG F, YAN W J, WANG X M, et al. Strengthened photocatalytic removal of bisphenol a by robust 3D hierarchical n-p heterojunctions Bi₄O₅Br₂-MnO₂via boosting oxidative radicals generation. Chemical Engineering Journal, 2022, 428: 131223.
[11]	XU M W, WANG Y Y, HA E N, et al. Reduced graphene oxide/Bi₄O₅Br₂ nanocomposite with synergetic effects on improving adsorption and photocatalytic activity for the degradation of antibiotics. Chemosphere, 2021, 265: 129013.
[12]	WANG S C, WANG L Z, HUANG W. Bismuth-based photocatalysts for solar energy conversion. Journal of Materials Chemistry A, 2020, 8(46): 24307. DOI URL
[13]	JIN X L, LÜ C D, ZHOU X, et al. A bismuth rich hollow Bi₄O₅Br₂ photocatalyst enables dramatic CO₂ reduction activity. Nano Energy, 2019, 64: 103955.
[14]	DONG F. Photocatalytic clean energy conversion boosted by vacancy-rich 2D/2D heterostructure. Acta Physico-Chimica Sinica. 2021, 37(8): 2012010.
[15]	CAO W, JIANG C Y, CHEN C, et al. A novel Z-Scheme CdS/Bi₄O₅Br₂ heterostructure with mechanism analysis: enhanced photocatalytic performance. Journal of Alloys and Compounds, 2021, 861: 158554.
[16]	FU J W, XU Q L, LOW J X, et al. Ultrathin 2D/2D WO₃/g-C₃N₄step-scheme H₂-production photocatalyst. Applied Catalysis B: Environmental, 2019, 243: 556.
[17]	YE L Q, JIN X L, LIU C, et al. Thickness-ultrathin and bismuth-rich strategies for BiOBr to enhance photoreduction of CO₂ into solar fuels. Applied Catalysis B: Environmental, 2016, 187: 281. DOI URL
[18]	QIU F Z, LI W J, WANG F Z, et al. In-situ synthesis of novel Z-scheme SnS₂/BiOBr photocatalysts with superior photocatalytic efficiency under visible light. Journal of Colloid and Interface Science, 2017, 493: 1. DOI URL
[19]	ZHOU Y H, PERKET J M, ZHOU J. Growth of Pt nanoparticles on reducible CeO₂(111) thin films: effect of nanostructures and redox properties of ceria. The Journal of Physical Chemistry C, 2010, 114(27): 11853. DOI URL
[20]	BECHE E, CHARVIN P, PERARNAU D, et al. Ce3d XPS investigation of cerium oxides and mixed cerium oxide(Ce_xTi_yO_z). Surface and Interface Analysis, 2008, 40(3/4): 264. DOI URL
[21]	ZHAO C Y, LIU L J, ZHANG Q Y, et al. Photocatalytic conversion of CO₂ and H₂O to fuels by nanostructured Ce-TiO₂/ SBA-15 composites. Catalysis Science & Technology, 2012, 2(12): 2558.
[22]	DING Y, HUANG L S, ZHANG J B, et al. Ru-doped, oxygen- vacancy-containing CeO₂ nanorods toward N₂ electroreduction. Journal of Materials Chemistry A, 2020, 8: 7229. DOI URL
[23]	WANG Z H, BAI Y X, LI Y P, et al. Bi₂O₂CO₃/red phosphorus S-scheme heterojunction for H₂ evolution and Cr(VI) reduction. Journal of Colloid and Interface Science, 2022, 609: 320. DOI URL

S型异质结Bi₄O₅Br₂/CeO₂的制备及其光催化CO₂还原性能

Bi₄O₅Br₂/CeO₂ Composite with S-scheme Heterojunction: Construction and CO₂ Reduction Performance

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