Nanomaterials
·
2022
·Vol. 12
·期 15
·2700
·
IF 5.719
Lijun Hu,Zhichao Ding,Fei Yan,Kuan Li,Li Feng,Hongqing Wang
Oxygen vacancy manipulation and hierarchical morphology construction in oxygen-containing semiconductors have been demonstrated to be effective strategies for developing high efficiency photocatalysts. In most studies of bismuth-based photocatalysts, hierarchical morphology and crystal defects are achieved separately, so the catalysts are not able to benefit from both features. Herein, using boiling ethylene glycol as the treatment solution, we developed an etching-recrystallization method for the fabrication of 3D hierarchical defective BiOCl at ambient pressure. The target hierarchical 3D-BiOCl is composed of self-assembled BiOCl nanosheets, which exhibit a hexagonal prism-like morphology on a micron scale, while simultaneously containing numerous oxygen vacancies within the crystal structure. Consequently, the target catalyst was endowed with a higher specific surface area, greater light harvesting capability, as well as more efficient separation and transfer of photo-excited charges than pristine BiOCl. As a result, 3D-BiOCl presented an impressive photocatalytic activity for the degradation of tetracycline hydrochloride in both visible light and natural white light emitting diode (LED) irradiation. Moreover, an extraordinary recycling property was demonstrated for the target photocatalyst thanks to its hierarchical structure. This study outlines a simple and energy-efficient approach for producing high-performance hierarchically defective BiOCl, which may also open up new possibilities for the morphological and crystal structural defect regulation of other Bi-based photocatalysts.Keywords:BiOCl;photocatalytic;lattice defects;hierarchical structure;degradation;ambient pressure
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiaoya Gao,Wen Peng,Guangbei Tang,Qian Guo,Yongming Luo
Visible-light-driven BiOCl microspheres were directly synthesized via a facile one-pot ethylene glycol mediated solvothermal method. The crystallinity, surface, optical and electronic properties of BiOCl samples were highly depended on the precursor concentration. Benefiting from the exposed (110) facet and oxygen vacancy , BiOCl-10 (synthesized from 0.02 mol of Bi(NO 3 ) 3 ·5H 2 O) displayed a maximum CBZ degradation efficiency of 70% after 180 min under visible light illumination. The reaction kinetics rate constant ( k ) of CBZ degradation in BiOCl-10 (0.0935 min −1 ) was 52 times higher than ordinary BiOCl-1 (0.0018 min −1 ). The improved photocatalytic activities of BiOCl-10 were attributed to the combination of enhanced CBZ adsorption, increased visible light absorption and efficient separation of photogenerated e − - h + pairs. Radicals and holes trapping experiments showed that •O 2 − and h + were predominant active species in the photocatalytic process. Most importantly, BiOCl-10 was also efficient in natural water without any additive. Our findings indicate that the BiOCl-10 photocatalysis can be used as an efficient and cost-effective technology for removal of recalcitrant pharmaceutical contaminants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE-POLAND
·
2023
·Vol. 41
·期 2
·354-367
·
IF 1.1
Biyang Tuo,Xiulong Shi,Jinwang Tian,Jianli Wang
To broaden the light response range of TiO2 and improve its photocatalytic activity, BiOCl/TiO2/MMT composite materials (BTMC) with outstanding photocatalytic performance were prepared by the sol-gel method with montmorillonite (MMT) as the supporting material, tetrabutyl titanate as titanium source and, bismuth nitrate pentahydrate as the bismuth source. The properties of the prepared materials were characterized by X-ray diffractometer (XRD), surface and porosity analysis (BET), scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), and ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS). When the Bi/Ti molar ratio was 20%, the composite material exhibited a slit mesoporous structure, and its specific surface area was 109.02 m2/g, with optimum photocatalytic activity. TiO2 and BiOCl formed the type-II heterojunction on the surface of MMT, which facilitates the transfer of photogenerated electrons and holes, thus enhancing the photocatalytic activity of BTMC-20. The results of this study indicated that BTMC-20 is a promising photocatalytic composite material and has better photocatalytic properties under visible light.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
X. Sun,M. Wang,N.X. Qian,X.Y. Sun,C. Liu,X. Zhang,R. Rao,Y.Q. Ma
Three dimensional (3D), two dimensional (2D), and one dimensional (1D) BiOCl catalysts have previously been synthesized and investigated. In this work, for the first time, 6.3-nm or zero dimensional (0D) BiOCl nanoparticles (NPs) and a series of BiOCl samples with different ratios of (001) exposed crystal faces were synthesized via a self-developed vapor-thermal method. Compared with the other samples, the 0D BiOCl possesses a higher ratio of exposed (001) faces, more oxygen vacancies , co-existent Bi +3−x and Bi +3+x , and fewer hydroxyl groups adsorbed to the NPs surface. The surface states result in a red-shift of the light absorption edge, reduced recombination probability, and an increased in the transfer rate for the photo-generated charge carriers. This resulted in an enhanced photocatalytic degradation ability for Rhodamine B (RhB). In addition, the 0D BiOCl exhibits hydrophobicity , while the other samples exhibit hydrophilicity . The proposed method was utilized to synthesize a few different kinds of photocatalysts and their composites with a unique morphology, novel properties, and excellent photocatalytic performance. This method paves the way for further improvements in photocatalytic performances and provides for the possibility of finding novel properties.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Kehan Fan,Chuan Yu,Sentai Cheng,Shenyu Lan,Mingshan Zhu
Development of high-performance piezocatalyst has attracted much attention for efficiently piezocatalytical removal of pharmaceuticals and personal care products in the wastewater. In this work, metallic Bi nanoparticles were successfully self-deposited on the surface of piezocatalyst BiOCl via an in-situ reduction method to modify the piezoelectric response for the piezocatalytic degradation of carbamazepine (CBZ). The present of Bi nanoparticles significantly enhanced piezocatalytic performance of BiOCl , in which 75.11% of CBZ (5 mg/L) was removed under ultrasonic vibration in the presence of Bi/BiOCl-50 (0.5 g/L) after 30 min, being 52.72% higher than that of pure BiOCl. Through scavenger test, electron paramagnetic resonance detection and electrochemical analysis , the enhanced piezocatalytic activity was due to that Bi nanoparticles improved the separation efficiency of piezoelectric charges to generate more reactive oxygen species. The stability of the piezocatalyst, effects of reaction parameters, treatment performance of real wastewater , and the possible pathways of CBZ degradation were systematically investigated. The work provides a deep understanding on the piezocatalytic process and brings a new track to enhance the piezocatalytic performance for Bi-based piezoelectric materials without introducing any impurities in water purification .
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2012
·
IF 4.72
Kun Zhang,Jie Liang,Shan Wang,Jie Liu,Kuaixia Ren,Xiao Zheng,Hui Luo,Yingjie Peng,Xing Zou,Xu Bo,Jihong Li,Xibin Yu
Bismuth oxychloride (BiOCl) sub-microcrystals with tunable morphologies from nanoflakes to hollow microspheres (HMSs) have been synthesized by hydrolyzing a hierarchical precursor (BiCl3) in a solution of water and ethanol with the addition of poly(vinylpyrrolidone) (PVP) and citric acid. The obtained BiOCl possessed sub-microcrystals from single crystals to polycrystals. The formation of the nestlike and hollow structure was found to be induced by citric acid and PVP. The crystal growth and morphology control of BiOCl were explored. Interestingly, citric acid was utilized both as a crystal-growth-inducing agent and a structure-directing agent. The morphology and compositional characteristics of BiOCl were investigated by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman, and UV–vis spectra. The photocatalytic activities of BiOCl with different structures have also been investigated by the degradation of Rhodamine-B (RhB) dye under ultraviolet light irradiation. The as-prepared BiOCl exhibited much higher photocatalytic activity than the comzmon one. In particular, the three-dimensional hierarchical structure such as microflowers and HMSs can effectively improve photocatalytic activity. The results show that BiOCl sub-microcrystals have promise as a novel material for photocatalytic applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Yujie Cai,Dongya Li,Jingyu Sun,Mengdie Chen,Yirui Li,Zhongwei Zou,Hua Zhang,Haiming Xu,Dongsheng Xia
The square-sharped BiOCl nanosheets with oxygen vacancies were successfully synthesized via a facile hydrothermal route using xylitol as surfactant. The as-prepared BiOCl samples were characterized by Powder X-ray Diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), UV–Vis diffuse reflectance spectra (DRS), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS) and Electron spin resonance (ESR). The as-prepared samples were phase-pure with the width and the thickness were about 50–400 nm and 20–50 nm respectively. Besides, the photodegradation performances showed the BiOCl nanosheets with 0.1 g concentration of xylitol (BOC-1) had the best photocatalytic activity under visible light due to its special polycrystalline structure, grain boundary and an optimum concentration of oxygen vacancies. The h + and O 2 − were the two main active species during the photocatalytic process and the possible photocatalytic mechanism was proposed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huiling Tang,Hengchao E,Chunxia Yao,Xuesheng Wang,Jiaxin Zhou,Wei Song,Zhijie Zhang
Exploring efficient photocatalysts holds significant importance for the prevention and treatment of antibiotic pollution. This research reports a 2D/2D CeO 2 /BiOCl S-scheme photocatalyst constructed by mesoporous CeO 2 and BiOCl nanosheets (NSs). Efficient charge separation and transfer was achieved by the synergistic effect of large-area contact and S-scheme charge transfer mechanism, which significantly enhanced the photocatalytic performance of CeO 2 /BiOCl. Experimental results demonstrated that the CeO 2 /BiOCl photocatalyst displayed superior photocatalytic activity to the individual components, which could efficiently eliminate four types of antibiotics, namely tetracycline (TC), chlortetracycline (CTC), doxycycline (DOC), and oxytetracycline (OTC) under UV light irradiation. Particularly, the sample of 0.4CeO 2 /BiOCl exhibited the highest catalytic efficiency, with a TC degradation rate constant of 0.01524 min −1 , which was 1.85 and 22.74 times higher than that of single CeO 2 and BiOCl, respectively. Moreover, liquid chromatograph-mass spectrometer (LC-MS) analysis is employed to reveal the degradation pathways of TC. This work offers an insightful idea for the fabrication of novel S-scheme photocatalysts applied in environmental purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 39
·期 2
·1274-1280
·
IF 3.159
Fan Tian,Yafang Zhang,Guangfang Li,Yunling Liu,Rong Chen
Bismuth oxychloride (BiOCl) nanosheets with tunable thickness were synthesized via a facile solvothermal method. The obtained BiOCl products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption. It was found that the metal ions (Fe3+, Co2+ and Na+) played a significant role in modulating the thickness of two-dimensional (2D) BiOCl nanostructures. Compared with commercial P25 and commercial BiOCl, the as-prepared BiOCl nanosheets exhibited superior activity for photosensitization degradation of organic dyes upon visible light irradiation. Furthermore, the photosensitization degradation activities were strongly correlated with the thickness of BiOCl nanosheets. The thinner nanosheets demonstrated a relatively high activity for the degradation of Rhodamine B (RhB). The enhanced photosensitization activities were ascribed to its low electron injection barrier and high electron mobility on the surface of BiOCl nanosheets, which was confirmed by transient photocurrent responses and electron impedance spectra of the samples.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2016
·
IF 0.951
Hui Meng,Tingting Wang,Hongbin Chen,Yizhu Liu,Xiang Yu,Yi Zhu,Yuanming Zhang
BiOCl/SnS 2 core-shell heterojunction is prepared by a facile and economic hydrothermal method. The obtained BiOCl/SnS 2 heterojunction displays high photocatalytic activity in the degradation of Rhodamine B (RhB). The high performance is explained by the fast separation of the photoinduced electron–hole pairs promoted by the heterojunction. The cycle life of the heterojunction is also improved compared with individual BiOCl or SnS 2 .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 46
·22419-22426
·
IF 3.925
Liran Liu,Hanping Fu,Yating Zeng,Li Feng,Tianxiang Zhang,Qingshuang Liang,Xiufeng Xiao
The development of high-efficiency economic photocatalysts for the production of hydrogen peroxide (H2O2) is of great significance for solar-to-fuel conversion. Bismuth oxychloride (BiOCl) shows great potential for photocatalytic H2O2 production, but the rapid recombination of electron–hole pairs reduces its photocatalytic performance. Herein, a series of Bi nanoparticle modified BiOCl (Bi/BiOCl) composites is constructed by an in situ chemical reduction to boost the spatial charge separation and transportation to enhance the photocatalytic performance for H2O2 production. Benefiting from the synergistic effects of localized surface plasmon resonance, the formation of Schottky barriers, and the in situ fabricated heterojunction that results in strong interfacial forces and tight contact, the obtained Bi/BiOCl composites exhibit enhanced photocatalytic capability for H2O2 production; the best sample can enable an impressive H2O2 production rate of 108 mmol g−1 h−1, which is much higher than that of individual BiOCl. The present work provides a clear understanding of the mechanisms of Bi nanoparticle modified BiOCl composites for photocatalytic H2O2 production, which will be useful for the development of catalysts toward solar-to-fuel conversion.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2015
·Vol. 99
·期 3
·881-887
·
IF 2.61
Meichao Gao,Dafeng Zhang,Xipeng Pu,Xin Shao,Hong Li,Dongdong Lv
Eu 3+ -doped BiOCl with different doping concentrations was synthesized by a simple combustion method. The as-synthesized photocatalysts were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and UV–vis diffuse reflectance spectroscopy. The experimental results show that Eu 3+ was successfully doped into the lattice of BiOCl. The as-synthesized Eu 3+ -doped BiOCl photocatalysts show a more intense continuous absorption in UV light region, accompanied with decreased energy band gap. Moreover, the Eu 3+ doping leads to the formation of oxygen vacancies, small crystallite size, and high specific surface areas. Compared with pure BiOCl, the Eu 3+ -doped BiOCl photocatalysts exhibits much higher photocatalytic activity for Rhodamine B (RhB) under UV light irradiation. As-obtained Eu 3+ -doped BiOCl can be easily reused with excellent stability. In addition, the mechanism of the improved photocatalytic properties of Eu 3+ -doped BiOCl was discussed in detail.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）