Fabrication and Photocatalytic Activity of BiPO4@Ag3PO4 Core/Shell Heterojunction†

doi:10.7503/cjcu20140266

Abstract

Abstract:

BiPO₄@Ag₃PO₄ core/shell heterojuction photocatalyst was synthesized through a facile hydrothermal process followed by the ion-exchange method. The morphology, crystallinity, composition, and photophy-sical properties of the catalyst were systematically investigated by scanning electron microscope(SEM), X-ray diffraction(XRD), energy dispersive X-ray analysis, UV-Vis diffuse reflectance spectrophotometer(DRS) and X-ray photoelectron spectroscopy(XPS). Meanwhile, Rhodamine B(RhB) was chosen as the target pollutant to evaluate the photocatalytic activity of BiPO₄@Ag₃PO₄ photocatalyst under the visible light and simulated sunlight irradiation, respectively. The results show that RhB was almost totally degraded in 60 min under visible-light irradiation and in 40 min under sunlight irradiation, respectively. The BiPO₄@Ag₃PO₄ core/shell heterojunction photocatalyst displayed enhanced photocatalytic activity against RhB, which is attributed to the effective charge separation by the core/shell heterojuction between the Ag₃PO₄ and BiPO₄. Active species detection experiments proved that during the process of degradation of pollutants over the core/shell microrods, the main mechanism was the direct oxidation process by the photo-induced holes. Ag₃PO₄ shell can improve the absorption of the visible light effectively and also enhance the stability, dispersibility and photocatalytic activity of the photocatalyst. The BiPO₄@AgPO₄ photocatalysts show attractive potential applications in pollution control, water splitting and solar cell.

Key words: BiPO4@Ag3PO4, Core/shell structure, Heterojunction, Holeoxidation

CLC Number:

O644
O613.62

TrendMD:

REN Yanlin, LI Xinyong, ZHAO Qidong. Fabrication and Photocatalytic Activity of BiPO₄@Ag₃PO₄ Core/Shell Heterojunction^†[J]. Chem. J. Chinese Universities, 2014, 35(11): 2435.

Figures/Tables 9

Fig.1 SEM images of BiPO4@Ag3PO4 core-shell heterostructure photocatalyst(A,B) and BiPO4 microrods(C,D) with different magnifications

Fig.2 TEM images of BiPO4microrods(A) and BiPO4@Ag3PO4 core-shell heterostructure photocatalyst with different magnifications(B, C) and HRTEM image of BiPO4@Ag3PO4(D) Inset of (B) is the magnified view of local TEM image.

Fig.3 XRD patterns of BiPO4(a) and BiPO4@Ag3PO4(b)

Fig.4 Overall XPS spectrum(A) and Ag3d(B), Bi4f(C), P2p XPS spectra(D) for BiPO4@Ag3PO4

Fig.5 DRS spectra of the as-prepared Ag3PO4(a), BiPO4(b) and BiPO4@Ag3PO4(c)

Fig.6 Photocatalytic degradation efficiencies of RhB over BiPO4@Ag3PO4(a), BiPO4 mixed with Ag3PO4(b), BiPO4(c) and photolysis without catalyst(d) under visible light(A) and simulant solar light(B) irradiation

Table 1 Reaction kinetic constants under different conditions*

Sample	k₁/min^-1	$R 12$	k₂/min^-1	$R 22$
BiPO₄@Ag₃PO₄	1.42×10^-2	0.8810	1.79×10^-2	0.9735
BiPO₄ mixed with Ag₃PO₄	1.16×10^-3	0.9781	3.62×10^-3	0.9818
BiPO₄	3.26×10^-5	0.9560	8.95×10^-4	0.9883
Photolysis	2.84×10^-6	0.9414	1.48×10^-5	0.9516

Table 1 Reaction kinetic constants under different conditions*

Sample	k₁/min^-1	$R 12$	k₂/min^-1	$R 22$
BiPO₄@Ag₃PO₄	1.42×10^-2	0.8810	1.79×10^-2	0.9735
BiPO₄ mixed with Ag₃PO₄	1.16×10^-3	0.9781	3.62×10^-3	0.9818
BiPO₄	3.26×10^-5	0.9560	8.95×10^-4	0.9883
Photolysis	2.84×10^-6	0.9414	1.48×10^-5	0.9516

Fig.7 Plots of photogenerated carriers trapping in different systems of photodegradation of RhB on BiPO4@Ag3PO4 a. BiPO4@Ag3PO4; b. purging N2; c. 1 mmol/L t-BuOH; d. 1 mmol/L EDTA.

Fig.8 Proposed photodegradation mechanism of RhB on the surface of BiPO4@Ag3PO4 core/shell heterojunction photocatalyst The potential values of CB and VB edges are cited vs. NHE.

References 31

[1]	Fox M. A., Dulay M. T., Chem. Rev., 1993, 93(1), 341—357
[2]	Choi J., Lee H., Choi Y., Kim S., Lee S., Lee S., Choi W., Lee J., Appl. Catal. B: Environ., 2014, 147, 8—16
[3]	Wang Y., Gao T., Wang K., Wu X., Shi X., Liu Y., Lou S., Zhou S., Nanoscale,2012, 4, 7121—7126
[4]	Dahubaiyila Wang X. H., Li X. T., Chem. J. Chinese Universities,2014, 35(2), 357—361
	(达胡白乙拉, 王晓晖, 李晓天. 高等学校化学学报,2014, 35(2), 357—361)
[5]	Chen X., Mao S. S., Chem. Rev., 2007, 107, 2891—2959
[6]	Cai Z., Teng J., Xiong Z., Li Y., Li Q., Lu X., Zhao X. S., Langmuir,2011, 27, 5157—5164
[7]	Chen X., Liu L., Yu P. Y., Mao S. S., Science,2011, 331, 746—750
[8]	Liao Y. C., Li H. Y., Liu Y. A., Zou Z. J., Zeng D. W., Xie C. S., J. Comb. Chem., 2010, 12, 883—889
[9]	Cai Z., Xiong Z., Lu X., Teng J., J. Mater. Chem. A,2014, 2, 545—553
[10]	Lu L., Li L., Huang X. D., Li Z., Zhang X. L., Wang L. L., Chem. J. Chinese Universities,2013, 34(9), 2202—2209
	(路露, 李莉, 黄贤丹, 李召, 张秀丽, 王丽丽. 高等学校化学学报,2013, 34(9), 2202—2209)
[11]	Teng W., Li X., Zhao Q., Chen G., J. Mater. Chem. A,2013, 1, 9060—9068
[12]	Li X., Li J. H., Li S. J., Fang X., Fang F., Chu X. Y., Wang X. H., Hu J. X., Chem. Res. Chinese Universities,2013, 29(6), 1032—1035
[13]	Yang J. K., Zhang X. T., Li B., Liu H., Sun P. P., Wang C. H., Wang L. L., Liu Y. C., J. Alloy Compd., 2014, 584, 180—184
[14]	Han C., Ge L., Chen C., Li Y., Xiao X., Zhang Y., Guo L., Appl. Catal. B: Environ., 2014, 147, 546—553
[15]	Pan C. S., Zhu Y. F., Environ. Sci. Technol., 2010, 44, 5570—5574
[16]	Lv Y., Liu Y., Zhu Y., Zhu Y., J. Mater. Chem. A,2014, 2, 1174—1182
[17]	Lin H., Ye H., Chen S., Chen Y., RSC Adv., 2014, 4, 10968—10974
[18]	Fulekar M. H., Singh A., Dutta D. P., Roy M., Ballal A., Tyagi A. K., RSC Adv., 2014, 4, 10097—10107
[19]	Liu Y. F., Lv Y. H., Zhu Y. Y., Liu D., Zong R. L., Zhu Y. F., Appl. Catal. B: Environ., 2014, 147, 851—857
[20]	Gao E. P., Wang W. Z., Nanoscale,2013, 5, 11248—11256
[21]	Yi Z., Ye J., Kikugawa N., Kako T., Ouyang S., Stuart-Williams H., Yang H., Cao J., Luo W., Li Z., Liu Y., Withers R. L., Nat. Mater., 2010, 9, 559—564
[22]	Bi Y., Ouyang S., Umezawa N., Cao J., Ye J., J. Am. Chem. Soc., 2011, 133, 6490—6492
[23]	Bi Y., Hu H., Jiao Z., Yu H., Lu G., Ye J., Phys. Chem. Chem. Phys., 2012, 14, 14486—14488
[24]	Bi Y., Hu H., Ouyang S., Jiao Z., Lu G., Ye J., Chem. Eur. J., 2012, 18, 14272—14275
[25]	Bi Y., Hu H., Ouyang S., Jiao Z., Lu G., Ye J., J. Mater. Chem., 2012, 22, 14847—14850
[26]	Teng W., Li X., Zhao Q., Zhao J., Zhang D., Appl. Catal. B: Environ., 2012, 125, 538—545
[27]	Wang Y., Li X., Wang Y., Fan C., J. Solid State Chem., 2013, 202, 51—56
[28]	Lin H., Ye H., Xu B., Cao J., Chen S., Catal. Commun., 2013, 37, 55—59
[29]	Pan C., Li D., Ma X., Chen Y., Zhu Y., Catal. Sci. Technol., 2011, 1, 1399—1405
[30]	Jiang B., Wang Y., Wang J. Q., Tian C., Li W., Feng Q., Pan Q., Fu H., Chem.Cat.Chem., 2013, 5, 1359—1367
[31]	Arabatzis I. M., Stergiopoulos T., Bernard M. C., Labou D., Neophytides S. G., Falaras P., Appl. Catal. B: Environ., 2003, 42, 187—201

Fabrication and Photocatalytic Activity of BiPO₄@Ag₃PO₄ Core/Shell Heterojunction^†

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 31

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	SONG Yingying, HUANG Lin, LI Qingsen, CHEN Limiao. Preparation of CuO/BiVO₄ Photocatalyst and Research on Carbon Dioxide Reduction [J]. Chem. J. Chinese Universities, 2022, 43(6): 20220126.
[2]	LIU Jiaqi, LI Tianbao. Preparation and Photoelectrochemical Performance of BiVO₄/CuBi₂O₄ Thin Film Photoanodes [J]. Chem. J. Chinese Universities, 2022, 43(4): 20220017.
[3]	XUE Jinbo, GAO Guoxiang, SHEN Qianqian, LIU Tianwu, LIU Xuguang, JIA Husheng. Construction of a Novel S-scheme CdS-BiVO₄ Heterojunction Photoelectrodes and Research on Hydrogen Production [J]. Chem. J. Chinese Universities, 2021, 42(8): 2493.
[4]	TANG Ding, ZHONG Shuiping. Preparation and Photoelectrochemical Performance of Bi_1-_xFe_xVO₄ Thin Film Photoanodes [J]. Chem. J. Chinese Universities, 2021, 42(8): 2509.
[5]	WANG Yishu, LI Xue, YAN Li, XU Hongyun, ZHU Yuxin, SONG Yanhua, CUI Yanjuan. Photocatalytic Reduction Performance of Z-scheme Two-dimensional BCN/Sn₃O₄ Composite Materials [J]. Chem. J. Chinese Universities, 2021, 42(12): 3722.
[6]	HAN Zhiying,LI Youji,CHEN Feitai,TANG Senpei,WANG Peng. Preparation of ZnO/Ag₂O Nanofibers by Coaxial Electrospinning and Study of Their Photocatalytic Properties ^† [J]. Chem. J. Chinese Universities, 2020, 41(2): 308.
[7]	LI Yefei, LIU Zhipan. Structure Prediction of Heterojunction Interfaces and the Application of AutoInterface Program [J]. Chem. J. Chinese Universities, 2020, 41(11): 2383.
[8]	Junjin WANG,Guoying ZHANG,Yaqiu SUN,Jingwang LIU. Construction of Ag₂CO₃/Bi₂O₂CO₃ p-n Heterojunction and Its Photocatalytic Activity ^† [J]. Chem. J. Chinese Universities, 2019, 40(12): 2590.
[9]	GAO Xiaoming, DAI Yuan, FEI Jiao, ZHANG Yu, FU Feng. Synthesis of n-p Heterojunction BiOBr/CdS Composites with Enhanced Photocatalytic Properties^† [J]. Chem. J. Chinese Universities, 2017, 38(7): 1249.
[10]	LIU Qiongjun, LIN Bizhou, LI Peipei, GAO Bifen, CHEN Yilin. Preparation of BiPO₄/BiVO₄ Composites with High Visible-light Photocatalytic Activity^† [J]. Chem. J. Chinese Universities, 2017, 38(1): 94.
[11]	ZHANG Qian, HU Shaozheng, LI Fayun, FAN Zhiping, WANG Qiong, WANG Fei, LI Wei, LIU Daosheng. Preparation of Zn_0.11Sn_0.12Cd_0.84S_1.12/g-C₃N₄ Heterojunctions and Their Photocatalytic Performance Under Visible Light^† [J]. Chem. J. Chinese Universities, 2016, 37(3): 521.
[12]	ZHANG Xue, LIU Jianxin, WANG Yawen, FAN Caimei, DUAN Donghong, WANG Yunfang. Synthesis, Photocatalytic Activity and Regeneration of AgBr/CuO Heterojunction Photocatalyst^† [J]. Chem. J. Chinese Universities, 2016, 37(1): 88.
[13]	WANG Wei, HE Jiaojie, CUI Fuyi, WANG Ce. Preparation of Ag₂O/TiO₂ Nanowires Heterojunction and Their Photocatalytic Activity Under Visible-light Irradiation^† [J]. Chem. J. Chinese Universities, 2015, 36(7): 1367.
[14]	LI Weibing, FENG Chang, YUE Jiguang, HUA Fangxia, BU Yuyu. Photocatalytic Performance of Hierarchical TiO₂/Ag₃PO₄Composite Under Visible-light Illumination^† [J]. Chem. J. Chinese Universities, 2015, 36(6): 1194.
[15]	QIAN Liu, DING Liming. Perovskite Solar Cells: Work Mechanism and Major Factors Affecting Their Performances^† [J]. Chem. J. Chinese Universities, 2015, 36(4): 595.