超分子前体制备g-C3N4/g-C3N4同质结及光催化性能研究

doi:10.19964/j.issn.1006-4990.2021-0260

Abstract

Abstract:

g-C₃N₄/g-C₃N₄ homojunction（CN-HP） with the morphology of porous nanosheets and hollow nanotubes was pre-pared from supramolecular precursor prepared by mixed calcination of dicyanodiamine hydrothermal method and melamine-cyanuric acid coprecipitation method.The photocatalyst was characterized by X-ray diffraction（XRD）,scanning electron mi-croscopy（SEM）,transmission electron microscopy（TEM）,ultraviolet-visible diffuse reflectance（UV-Vis DRS）,photolumi-nescence spectroscopy（PL）,etc.The results showed that CN-HP-1/1 exhibited a degradation rate of 99.8% for methylene blue（MB） within 75 min,and the pseudo first-order kinetic constant was 4.02 h^-1,which was 5 times that of bulk g-C₃N₄.And the reaction constant per unit specific surface area was increased to 1.8 times that of monomeric g-C₃N₄.The PL test showed that the photogenerated electron-hole recombination rate of the homojunction prepared by the appropriate ratio of MCA was lower than that of the monomer g-C₃N₄. Free radical capture experiments showed that photo-generated holes were the main active species in the photocatalytic degradation process.Combined with XPS valence band spectroscopy tests,it was proposed that the homojunction photocatalysts had a Z-scheme electron transport mechanism.

Key words: g-C₃N₄, supramolecular, homojunctions, photocatalysis

CLC Number:

O644.1

BAN Changsheng,LI Jun,JIN Yang,CHEN Ming,ZUO Longtao. Study on preparation of g-C₃N₄/g-C₃N₄ homojunction by supramolecular precursor and its photocatalytic property[J]. Inorganic Chemicals Industry, 2022, 54(3): 125-131.

Figures/Tables 9

Fig.1

Fig.2

Table 1

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

References 14

[1]	孙海杰, 刘欣改, 陈志浩, 等. BiOI/g-C₃N₄光催化降解甲基橙研究[J]. 无机盐工业, 2021, 53(4):90-94.
[2]	殷楠, 刘婵璐, 张进. MoO₃/g-C₃N₄复合材料的制备及光催化性能[J]. 无机盐工业, 2020, 52(10):161-165.
[3]	DONG X, CHENG F. Recent development in exfoliated two-dimen-sional g-C₃N₄ nanosheets for photocatalytic applications[J]. Journal of Materials Chemistry A, 2015, 3(47):23642-23652. doi: 10.1039/C5TA07374J
[4]	庞丹丹, 李洁冰, 宋忠贤, 等. g-C₃N₄光催化剂的改性优化研究进展[J]. 环境工程, 2019, 37(4):104-111.
[5]	ZHOU C, LAI C, HUANG D, et al. Highly porous carbon nitride by supramolecular preassembly of monomers for photocatalytic removal of sulfamethazine under visible light driven[J]. Applied Catalysis B:Environmental, 2018, 220:202-210. doi: 10.1016/j.apcatb.2017.08.055
[6]	DONG H, ZHANG X, LI J, et al. Construction of morphology-con-trolled nonmetal 2D/3D homojunction towards enhancing photoca-talytic activity and mechanism insight[J]. Applied Catalysis B:En-vironmental, 2019, 263.Doi: 10.1016/j.apcatb.2019.118270. doi: 10.1016/j.apcatb.2019.118270
[7]	DENG Q, LI H, BA G, et al. The pivotal role of defects in fabrication of polymeric carbon nitride homojunctions with enhanced photoca-talytic hydrogen evolution[J]. Journal of Colloid and Interface Science, 2021, 586:748-757. doi: 10.1016/j.jcis.2020.10.144
[8]	JUN Y S, LEE E Z, WANG X C, et al. From melamine-cyanuric acid supramolecular aggregates to carbon nitride hollow spheres[J]. Ad-vanced Functional Materials, 2013, 23(29):3661-3667.
[9]	MO Z, XU H, CHEN Z, et al. Self-assembled synjournal of defect-en-gineered graphitic carbon nitride nanotubes for efficient conver-sion of solar energy[J]. Applied Catalysis B:Environmental, 2018, 225:154-161. doi: 10.1016/j.apcatb.2017.11.041
[10]	ZHOU B, DING S, ZHANG B. Dimensional transformation and mo-rphological control of graphitic carbon nitride from water-based supramolecular assembly for photocatalytic hydrogen evolution:From 3D to 2D and 1D nanostructures[J]. Applied Catalysis B:Environmental, 2019, 254:321-328. doi: 10.1016/j.apcatb.2019.05.015
[11]	LI J, LIU X, CHE H, et al. Facile construction of O-doped crys-talline/non-crystalline g-C₃N₄ embedded nano-homojunction for efficiently photocatalytic H₂ evolution[J]. Carbon, 2021, 172:602-612. doi: 10.1016/j.carbon.2020.10.051
[12]	LIANG D, HUANG Y, WU F, et al. In situ synjournal of g-C₃N₄/TiO₂ with{001} and{101} facets co-exposed for water remediation[J]. Applied Surface Science, 2019, 487:322-334. doi: 10.1016/j.apsusc.2019.05.088
[13]	吴瞳, 顾佳玉, 彭晨, 等. 石墨相氮化碳同质结(MeCN-CN)光催化处理水中双酚A的研究[J]. 中国环境科学, 2021, 41:76-87.
[14]	LIU C, DONG X, HAO Y, et al. A novel supramolecular preorgani-zation route for improving g-C₃N₄/g-C₃N₄ metal-free homojunction photocatalysis[J]. New Journal of Chemistry, 2017, 41(20):11872-11880. doi: 10.1039/C7NJ02639K

光催化剂	比表面积/ （m²·g^-1）	平均孔径/ nm	孔容/ （cm³·g^-1）
BCN	8.8	32.5	0.042
CN-H	52.6	14.5	0.193
CN-HP-3/1	40.4	18.3	0.158
CN-HP-1/1	47.8	17.5	0.174
CN-HP-1/3	49.6	17.1	0.186
CN-P	56.7	16.5	0.202

[1]	TANG Bei. Preparation of ZnO/g-C₃N₄ heterojunction photocatalytic material and its degradation of pyridine [J]. Inorganic Chemicals Industry, 2024, 56(4): 133-142.
[2]	HUANG Jianan, LU Xiaoyu, WANG Mitang. Effect of Ba-La co-doping on degradation of methylene blue dye by TaON [J]. Inorganic Chemicals Industry, 2024, 56(2): 146-151.
[3]	YANG Bo, LIANG Zhiyan, LIU Wenyuan, CAO Jiazhen, LIU Xinyue, XING Mingyang. Research progress of application of molybdenum-based catalytic materials for water pollution control [J]. Inorganic Chemicals Industry, 2023, 55(8): 1-12.
[4]	YU Hongchao, ZHANG Mengmeng, JIN Tianxiang. Research progress of microstructure and crystal surface effect of Ag₃PO₄ photocatalysts [J]. Inorganic Chemicals Industry, 2023, 55(8): 13-20.
[5]	ZHAO Yan, HAO Xuewei, SHI Hainan, LI Jiahui, LI Keyan, GUO Xinwen. Study on photocatalytic CO₂reduction performance of Cu-doped TiO₂/PCN heterojunction [J]. Inorganic Chemicals Industry, 2023, 55(8): 21-27.
[6]	SUN Haijie, CHENG Yuan, TIAN Yuan, LIU Hongyan, CHEN Zhihao. Preparation of BiOI/g-C₃N₄ catalyst and its photocatalytic degradation performance of Rhodamine B [J]. Inorganic Chemicals Industry, 2023, 55(8): 36-44.
[7]	SONG Zhijia, WANG Suisui, KUANG Qin. Hollow Cu-doped TiO₂ for enhancing photocatalytic CO₂ reduction performance [J]. Inorganic Chemicals Industry, 2023, 55(8): 45-50.
[8]	LAN Yinghua, CHEN Yanmei, MA Ruixiao, ZHANG Yanhui. Preparation and photocatalytic performance of Ce-Ti oxide-attapulgite composites [J]. Inorganic Chemicals Industry, 2023, 55(4): 133-140.
[9]	CHEN Zhangxu, FU Minglian, ZHU Danchen, ZHENG Bingyun. Preparation of carbon/graphite carbon nitride composites and their methylene blue removal performance [J]. Inorganic Chemicals Industry, 2023, 55(3): 134-139.
[10]	QIU Xiaokui, ZHANG Ruofan, WANG Xiaoyan, WANG Hailong, ZHANG Qixue, WAN Chao, XU Lixin. Research on bamboo shavings carbon supported ruthenium catalysts for hydrogen generation from photocatalytic hydrolysis of ammonia borane [J]. Inorganic Chemicals Industry, 2023, 55(10): 153-158.
[11]	ZHANG Zhe,LIAO Mingyu,CHEN Ming,YU Shanshan,ZHOU Kangdi,LI Jiachun,ZHANG Linfeng,WU Huadong,GUO Jia. Application of CeO₂-ZnO/KIT-6 catalyst in photocatalytic adsorption desulfurization [J]. Inorganic Chemicals Industry, 2022, 54(9): 143-149.
[12]	TONG Haijuan,LI Siqi,FAN Fangfang,ZUO Weiyuan,SHI Bingfang. Facile synthesis of bismuth oxychloride and its photocatalytic degradation performance of p-nitrophenol [J]. Inorganic Chemicals Industry, 2022, 54(9): 157-162.
[13]	YANG Wenbo,WU Pan,HE Jian,LIU Changjun,JIANG Wei. Study on effect of heating rate on structure-activity of g-C₃N₄photocatalyst by pyrolysis of urea [J]. Inorganic Chemicals Industry, 2022, 54(4): 169-174.
[14]	JI Chang,WANG Guosheng. Degradation of berberine by visible light over Ag₃PO₄ /g-C₃N₄ heterojunction catalyst [J]. Inorganic Chemicals Industry, 2022, 54(4): 175-180.
[15]	LIANG Fang,SHI Fanian. Research progress on synthesis of bismuth based bimetallic photocatalyst and degradation of organic pollutants [J]. Inorganic Chemicals Industry, 2022, 54(4): 61-68.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation of g-C₃N₄/g-C₃N₄ homojunction by supramolecular precursor and its photocatalytic property

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 14

Related Articles 15

Metrics

Comments

Recommended 0

Study on preparation of g-C3N4/g-C3N4 homojunction by supramolecular precursor and its photocatalytic property