CuS纳米片修饰Bi5O7I复合材料用于光催化还原Cr(VI)水溶液

doi:10.15541/jim20200356

摘要/Abstract

摘要：

光催化技术以其高效、安全、低成本的优势, 被广泛研究用于去除污水中有毒副作用的重金属Cr(VI)。制备半导体复合材料是一种可以有效提高半导体光催化性能的途径。本研究通过简单的水热法合成了CuS纳米片修饰的Bi₅O₇I复合材料, 并且表征和评估了其在可见光下对Cr(VI)的光催化还原活性。与纯Bi₅O₇I微米棒及纯CuS样品相比, CuS/Bi₅O₇I复合催化剂对Cr(VI)水溶液具有更高的光催化降解活性。在相同的可见光辐照条件下, 15wt% CuS修饰的复合样品, 光催化降解Cr(VI)的反应常数是纯/Bi₅O₇I样品的20倍, 纯CuS样品的4.3倍。对比样品的比表面积、光致发光谱和电化学阻抗谱的测试结果发现, 复合样品表现出更高的催化效率是由于CuS/Bi₅O₇I具有更大的比表面积、更宽的光吸收区域及更高的光生电子-空穴对的分离和传输效率。本研究还提出了CuS/Bi₅O₇I复合材料光催化降解Cr(VI)的机理。

关键词: CuS/Bi₅O₇I复合光催化剂, 可见光催化剂, 光催化降解Cr(VI)

Abstract:

Photocatalytic approach has been extensively explored to remove toxic Cr(VI) in wastewater owing to its high efficient, safe and low cost features. Fabricating semiconductor composite is supposed to be an effective approach to improve the poor photocatalytic activity of single component. In this work, we prepared CuS nanosheets decorated Bi₅O₇I composites by a simple hydrothermal method, and characterized and evaluated its photoatalytic reduction activity of Cr(VI) under the visible-light irradiation. Compared to pure Bi₅O₇I microrods and CuS nanoparticles, the as-prepared CuS/Bi₅O₇I composites exhibits more efficient photocatalytic reduction of aqueous Cr(VI). The reaction rate constant of 15wt% CuS/Bi₅O₇I catalyst was 20 times and 4.3 times of that of pristine Bi₅O₇I and CuS, respectively. BET, photoluminescence and EIS spectra measurement demonstrate that the improved photocatalytic activity may be attributed to their higher surface areas, broader light absorption region, improved separation, and transfer efficiency of photo-induced electron-hole pairs. Moreover, a possible photocatalytic mechanism of CuS/Bi₅O₇I catalyst is also proposed.

Key words: CuS/Bi₅O₇I composite photocatalyst, visible-light photocatalyst, photocatalytic reduction of Cr(VI)

中图分类号:

O614

蔡苗, 陈子航, 曾实, 杜江慧, 熊娟. CuS纳米片修饰Bi₅O₇I复合材料用于光催化还原Cr(VI)水溶液[J]. 无机材料学报, 2021, 36(6): 665-672.

CAI Miao, CHEN Zihang, ZENG Shi, DU Jianghui, XIONG Juan. CuS Nanosheet Decorated Bi₅O₇I Composite for the Enhanced Photocatalytic Reduction Activity of Aqueous Cr(VI)[J]. Journal of Inorganic Materials, 2021, 36(6): 665-672.

图/表 9

Scheme 1 Preparation process diagram of CuS/Bi5O7I composites

Fig. 1 XRD patterns of Bi5O7I, CuS, and CuS/Bi5O7I composites

Fig. 2 SEM images of (a) pure Bi5O7I, (b) CB-10, (c) CB-15 and (d) CB-20 composites

Fig. 3 (a) TEM and (b) HRTEM images of CB-15 composite

Fig. 4 (a) XPS survey spectrum and high resolution XPS spectra of (b) Bi4f, (c) I3d, (d) O1s, (e) Cu2p, and (f) S2s of CB-15 composite

Fig. 5 (a) UV-Vis diffuse reflectance spectra of Bi5O7I, CuS and CuS/Bi5O7I composites, (b) plots of (αhv)1/2 vs hv of Bi5O7I and CuS, CuS/Bi5O7I composites and (c) N2 adsorption and desorption isotherms for pure Bi5O7I and CB-15 composite

Fig. 6 (a) PL spectra and (b) electrochemical impedance spectra of Bi5O7I and CB-15 composite

Fig. 7 (a) Photocatalytic efficiency, (b) corresponding kinetic curves for the photocatalytic reduction of aqueous Cr(VI) with Bi5O7I and CuS/Bi5O7I composites (experimental conditions: 150 mL of 10 mg/L Cr(IV) solution, 100 mg of catalyst)

Fig. 8 Schematic diagram of proposed mechanism for photocatalytic reduction of Cr(VI) for CuS/Bi5O7I composite under visible light illumination

参考文献 29

[1]	ZHU K R, GAO Y, TAN X, et al. Polyaniline modified Mg/Al layered double hydroxide composites and their application in efficient removal of Cr(VI). ACS Sustainable Chemistry & Engineering, 2016,4:4361-4369.
[2]	ZHANG S, LI B F, WANG X X, et al. Recent developments of two-dimensional graphene-based composites in visible-light photocatalysis for eliminating persistent organic pollutants from wastewater. Chemical Engineering Journal, 2020,390:124642. DOI URL
[3]	ZHU K R, CHEN C L, LU S H, et al. MOFs-induced encapsulation of ultrafine Ni nanoparticles into 3D N-doped graphene-CNT frameworks as a recyclable catalyst for Cr(VI) reduction with formic acid. Carbon, 2019,148:52-63. DOI URL
[4]	HU C Y, LEI E, HU K K, et al. Simple synthesis of 3D flower-like g-C₃N₄/TiO₂ composite microspheres for enhanced visible-light photocatalytic activity. Journal of Materials Science, 2020,55(1):151-162. DOI URL
[5]	ZHAO G X, SUN Y B, ZHAO Y K, et al. Enhanced photocatalytic simultaneous removals of Cr(VI) and bisphenol A over Co(II)-modified TiO₂. Langmuir, 2019,35:276-283. DOI URL
[6]	WANG Q L, DONG R F, WANG C, et al. Glucose-fueled micromotors with highly efficient visible-light photocatalytic propulsion. ACS Applied Materials Interfaces, 2019,11:6201-6207. DOI URL
[7]	CHEN W B, YANG Z F, XIE Z, et al. Benzothiadiazole functionalized D-A type covalent organic frameworks for effective photocatalytic reduction of aqueous chromium (VI). Journal of Materials Chemistry A, 2019,7:998-1004. DOI URL
[8]	ZHANG R, HAN Q, LI Y, et al. Fabrication and characterization of high efficient Z-scheme photocatalyst Bi₂MoO₆/reduced graphene oxide/BiOBr for the degradation of organic dye and antibiotic under visible-light irradiation. Journal of Materials Science, 2019,54:14157-14170. DOI URL
[9]	YANG Q, LUO M L, LIU K W, et al. A composite of single-crystalline Bi₂WO₆ and polycrystalline BiOCl with a high percentage of exposed (001) facets for highly efficient photocatalytic degradation of organic pollutants. Chemical Communications, 2019,55:5728-5731. DOI URL
[10]	SULTANA S, MANSINGH S, PARIDA K. Facile synthesis of CeO₂ nanosheets decorated upon BiOI microplate: a surface oxygen vacancy promoted Z-scheme-based 2D-2D nanocomposite photocatalyst with enhanced photocatalytic activity. The Journal of Physical Chemistry C, 2017,122:808-819. DOI URL
[11]	GENG X Q, CHEN S, LÜ X, et al. Synthesis of g-C₃N₄/Bi₅O₇I microspheres with enhanced photocatalytic activity under visible light. Applied Surface Science, 2018,462:18-28. DOI URL
[12]	WU G J, ZHAO Y, LI Y W, et al. Assembled and isolated Bi₅O₇I nanowires with good photocatalytic activities. CrystEngComm, 2017,17:2113-2125.
[13]	LI B, CHEN X W, ZHANG T Y, et al. Photocatalytic selective hydroxylation of phenol to dihydroxybenzene by BiOI/TiO₂ p-n heterojunction photocatalysts for enhanced photocatalytic activity. Applied Surface Science, 2018,439:1047-1056. DOI URL
[14]	DONG Z J, PAN J Q, WANG B B, et al. The p-n-type Bi₅O₇I-modified porous C₃N₄ nano-heterojunction for enhanced visible light photocatalysis. Journal of Alloys & Compounds, 2018,747:788-795.
[15]	CHEN Y N, ZHU G Q, GAO J Z, et al. Three-dimensional Ag₂O/Bi₅O₇I p-n heterojunction photocatalyst harnessing UV-Vis-NIR broad spectrum for photodegradation of organic pollutants. Journal of Hazardous Materials, 2018,344:42-54. DOI URL
[16]	YANG N, X, LÜ X, ZHONG S T, et al. Preparation of Z-scheme AgI/Bi₅O₇I plate with high visible light photocatalytic performance by phase transition and morphological transformation of BiOI microspheres at room temperature. Dalton Transactions, 2018,47:11420-11428. DOI URL
[17]	MA R, ZHANG S, LI L, et al. Enhanced visible-light-induced photoactivity of Type-II CeO₂/g-C₃N₄ nanosheet towards organic pollutants degradation, ACS Sustainable Chemistry & Engineering, 2019,7:9699-9708.
[18]	KAMRANIFAR M, ALLAHRESANI A, NAGHIZADEH A. Synthesis and characterizations of a novel CoFe₂O₄@CuS magnetic nanocomposite and investigation of its efficiency for photocatalytic degradation of penicillin G antibiotic in simulated wastewater. Journal of Hazardous Materials, 2019,366:545-555. DOI URL
[19]	LIM W, WU H, LIM Y, et al. Facilitating the charge transfer of ZnMoS₄/CuS p-n heterojunctions through ZnO intercalation for efficient photocatalytic hydrogen generation. Journal of Materials Chemistry A, 2019,6:11416-11423. DOI URL
[20]	DAS K, MAJHI D, BHOI Y, et al. Combustion synthesis, characterization and photocatalytic application of CuS/Bi₄Ti₃O₁₂ p-n heterojunction materials towards efficient degradation of 2-methyl-4-chlorophenoxyacetic acid herbicide under visible light. Chemical Engineering Journal, 2019,362:588-599. DOI URL
[21]	WU R Y, SONG H B, LUO N, et al. Microwave-assisted preparation and enhanced photocatalytic activity of Bi₂WO₆/BiOI heterojunction for organic pollutants degradation under visible-light irradiation. Solid State Science, 2019,87:101-109. DOI URL
[22]	HU C C, CHEN T S, HUANG H X. Heterojunction of n-type Sr₂TiO₄ with p-type Bi₅O₇I with enhanced photocatalytic activity under irradiation of simulated sunlight. Applied Surface Science, 2017,426:536-544. DOI URL
[23]	SUN L X, SUN J H, HAN N, et al. rGO decorated W doped BiVO₄ novel material for sensing detection of trimethylamine. Sensors & Actuators B: Chemical, 2019,298:126749.
[24]	LI Q, DU X J, XIA C Q, et al. Fabrication and photocatalytic properties of nano CuS/MoS₂ composite catalyst by dealloying amorphous Ti-Cu-Mo alloy. Applied Surface Science, 2019, 467-468:221-228.
[25]	CHAHKANDIA M, ZARGAZI M. Novel method of square wave voltammetry for deposition of Bi₂S₃ thin film: photocatalytic reduction of hexavalent Cr in single and binary mixtures. Journal of Hazardous Materials, 2019,380:120879. DOI URL
[26]	CHEN K L, ZHU K R, CHEN K, et al. Synthesis of Ag nanoparticles decoration on magnetic carbonized polydopamine nanospheres for effective catalytic reduction of Cr(VI). Journal of Colloid and Interface Science, 2018,526:1-8. DOI URL
[27]	ZHANG S, LIU Y, GU P C. Enhanced photodegradation of toxic organic pollutants using dual-oxygen-doped porous g-C₃N₄: mechanism exploration from both experimental and DFT studies. Applied Catalysis B: Environmental, 2019,248:1-10. DOI URL
[28]	FEI T, YU L M, LIU Z Y, et al. Graphene quantum dots modified flower like Bi₂WO₆ for enhanced photocatalytic nitrogen fixation. Journal of Colloid and Interface Science, 2019,557:498-505. DOI URL
[29]	PAN J B, LIU J J, ZUO S L, et al. Synthesis of cuboid BiOCl nanosheets coupled with CdS quantum dots by region-selective deposition process with enhanced photocatalytic activity. Materials Research Bulletin, 2018,103:216-224. DOI URL

CuS纳米片修饰Bi₅O₇I复合材料用于光催化还原Cr(VI)水溶液

CuS Nanosheet Decorated Bi₅O₇I Composite for the Enhanced Photocatalytic Reduction Activity of Aqueous Cr(VI)

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 9

参考文献 29

相关文章 15

编辑推荐

Metrics

本文评价

[1]	孙炼, 顾全超, 杨雅萍, 王洪磊, 余金山, 周新贵. 二维过渡金属硫属化合物氧还原反应催化剂的研究进展[J]. 无机材料学报, 2022, 37(7): 697-709.
[2]	李文博, 黄民松, 李月明, 李驰麟. 双盐镁电池CoS₂正极材料的电化学性能研究[J]. 无机材料学报, 2022, 37(2): 173-181.
[3]	汤丹蕾, 贾丽华, 赵振龙, 杨瑞, 王欣, 郭祥峰. EDTA辅助合成Co₃O₄纳米材料及其气敏性能[J]. 无机材料学报, 2020, 35(11): 1214-1222.
[4]	李泽晖,谭美娟,郑元昊,骆雨阳,经求是,蒋靖坤,李明杰. 导电金属有机骨架材料在超级电容器中的应用[J]. 无机材料学报, 2020, 35(7): 769-780.
[5]	彭章美,赵安婷,付茂芬. Q[6]/CdS-Ag₂S复合光催化剂的合成及光催化性质[J]. 无机材料学报, 2020, 35(6): 703-708.
[6]	陈钧,马培华,张诚,劳伦·鲁尔曼,吕耀康. 新型多功能无机/有机复合薄膜的制备及电化学性能研究[J]. 无机材料学报, 2020, 35(2): 217-223.
[7]	肖剑飞, 乃学瑛, 苟生莲, 叶俊伟, 董亚萍, 李武. 邻苯二甲酸氢钾在制备碱式硫酸镁纳米线过程中的机理研究[J]. 无机材料学报, 2019, 34(11): 1181-1186.
[8]	许云青,王海增. EDTA辅助水热法制备不同形貌的氟化镁钠[J]. 无机材料学报, 2019, 34(9): 933-937.
[9]	李思汉, 张超, 吴辰亮, 张荷丰, 严新焕. 低负载量Pd/CeO₂/γ-Al₂O₃催化剂用于低温催化氧化VOCs[J]. 无机材料学报, 2019, 34(8): 827-833.
[10]	张峰, 张凯立, 周明明, 陈超, 蔡志威, 魏国辉, 姜兴茂, 张诚, 劳伦·鲁尔曼, 吕耀康. 基于纳米银负载氧化石墨烯的新型聚乙烯复合材料[J]. 无机材料学报, 2019, 34(6): 633-640.
[11]	邓立儿, 李妍, 巩蕾, 王佳. Ag₂S纳米晶的制备及其近红外光热治疗应用[J]. 无机材料学报, 2018, 33(8): 825-831.
[12]	王树江, 杨永恒, 温春阳, 张国馗, 苑春晖. 纳米银/伊利石复合材料的制备及其性能研究[J]. 无机材料学报, 2018, 33(5): 570-576.
[13]	杨志胜, 柯蔚芳, 王艳香, 黄丽群, 郭平春, 朱华. 杂化钙钛矿(HOC₂H₄NH₃)₂CuCl₄的制备与表征[J]. 无机材料学报, 2017, 32(10): 1063-1067.
[14]	湛菁, 陆二聚, 蔡梦, 马雅琳, 张传福. 棒状多孔NiCo₂O₄粉末的可控制备及其电催化性能研究[J]. 无机材料学报, 2017, 32(1): 11-17.
[15]	赵新红, 高向平, 赵江波, 张晓晓, 郝志鑫. 低量结构导向剂改进离子热法高效合成LTA型磷酸铝分子筛[J]. 无机材料学报, 2016, 31(11): 1212-1218.