NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 42
·期 1
·489-496
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IF 3.269
Zengyu You,Qianhong Shen,Yuxuan Su,Yang Yu,Hui Wang,Tian Qin,Fang Zhang,Di Cheng,Hui Yang
A novel Z-scheme core–shell g-C3N4/MCNTs/BiOI heterojunction was successfully designed and fabricated through filling multi-walled carbon nanotubes (MCNTs) with g-C3N4, followed by the loading of BiOI on the outer surface of the MCNTs. The structure–property relationship was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), photoluminescence spectra (PL), ESR probe tests and reactive species trapping measurements. The results show that the BiOI nanoparticles are uniformly loaded on the surface of the MCNTs which are fully filled by g-C3N4. The MCNTs connect the two semiconductors of g-C3N4 and BiOI, and serve as electron mediating conductors to promote the transfer of the photo-generated electrons, thereby constructing a Z-scheme heterojunction between g-C3N4 and BiOI. With this unique structure, enhanced visible-light photocatalytic activities are achieved because of the synergistic effect of light harvesting and improved separation efficiency of photo-generated carriers.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 20
·9764-9772
·
IF 6.233
Dongfang Hou,Xianluo Hu,Pei Hu,Wei Zhang,Mingfei Zhang,Yunhui Huang
A novel p–n junction photocatalyst of Bi4Ti3O12 nanofibers–BiOI nanosheets has been fabricated through a simple and economical technique of electrospinning combined with a successive ionic layer adsorption and reaction (SILAR) process. The products are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectra (DRS), and photoluminescence (PL) spectroscopy. The as-formed Bi4Ti3O12 nanofibers are composed of inter-linked nanoparticles of 50–80 nm in size. The thickness of the as-grown BiOI nanosheets is about 10 nm and the size of the BiOI nanosheets increases with the SILAR cycles. In particular, many {001} facets of BiOI nanosheets are exposed, which is favorable to enhance the visible-light photocatalytic activity. The p–n junction photocatalyst exhibits enhanced visible-light-driven photocatalytic activity for decomposition of rhodamine B (RhB) and phenol. The enhanced photocatalytic activity can be attributed to the extended absorption in the visible light region resulting from the BiOI nanosheets and the effective separation of photogenerated carriers driven by the photo-induced potential difference generated at the Bi4Ti3O12–BiOI p–n junction interface.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Lingtao Zeng,Yundi Geng,Wei Geng,Hankun Zhang,Teng Li,Changjiang Liu,Chuncheng Yang,Yan Li,Hongchao Li
This study addresses critical challenges associated with fiber-supported photocatalysts, including complex preparation procedures, degradation of mechanical properties, low ion utilization efficiency in precursor solutions, and weak interactions between the photocatalyst and the fiber. To address these challenges, K + /Na + ion exchange coupled with solvothermal synthesis was employed to modify basalt fiber cloth (BFc) by synthesizing BiOI. The mechanical properties of BFc were significantly enhanced through the ion exchange process. The key findings include the synthesis of BiOI nanoflower spheres (0.6–1.2 μm) on BFc, which are smaller than those reported in previous studies (2–9 μm). BiOI forms stable Bi-O-Si linkages with BFc, thereby resulting in a highly stable composite. The BiOI/BFc composite exhibited increases of 12.59% in tensile strength and 20.88% in elastic modulus compared to pure BFc. Moreover, the composite demonstrated exceptional photocatalytic performance and long-term stability in RhB degradation, with the reaction rate constant (k) increasing as the temperature rose. The primary active species involved in the reaction were •O 2 − and h + . This study presents a novel approach for the preparation of BFc-based composites with enhanced performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 19
·3488-3497
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IF 3.545
Panbing Hu,Yanmei Xin,Congfei Yao,Yuqing Miao
In2S3/BiOI composites were synthesized at room temperature which significantly improved the photocatalytic degradation of tetracycline hydrochloride (TC) under visible light irradiation. Structure and morphology characterization techniques have been performed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction measurements (XRD) and X-ray photoelectron spectra (XPS). The separation ability of photogenerated carriers is enhanced due to the formation of heterojunctions of the composites. The best performance is obtained when the content of In2S3 is 7 wt%. Compared with In2S3 and BiOI alone, 7-In2S3/BiOI has the highest specific surface area and can provide more active sites. Based on the photo-electrochemical characterization and free radical tests, a photocatalytic mechanism of In2S3/BiOI composites in the presence of superoxide radicals (˙O2−) and holes (h+) is reasonably proposed.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2023
·Vol. 220
·期 17
·2300261
·
IF 2
Ting Li,Mengzhou Ma,Junhai Wang,Qiang Li,Yunwu Yu,Qianqian Zou,Xinran Li,Xiaoyi Wei,Tingting Yan,Yulan Tang
As an efficient, safe, and environmentally friendly technology, semiconductor photocatalysis has been widely used in the removal of antibiotics from wastewater. In this work, a novel Ag/BiOI/g-C 3 N 4 composite photocatalytic material, BiOI/g-C 3 N 4 , g-C 3 N 4 , and BiOI are prepared as the photocatalysts. The morphologies, chemical properties, and photocatalytic performances of the photocatalysts are characterized using scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectrometer, ultraviolet–visible spectroscopy (UV–Vis) diffuse reflectance spectra, and photoluminescence spectra. In addition, tetracycline hydrochloride (TC) and ceftiofur sodium aqueous solutions are used to simulate wastewater and the photocatalytic degradation performances of the photocatalysts are investigated and compared under visible light. Compared to g-C 3 N 4 , BiOI, and BiOI/g-C 3 N 4 , the Ag/BiOI/g-C 3 N 4 demonstrates superior performance, increasing the removal rates of TC and ceftiofur sodium to 85.6% and 90.2%, respectively. The photocatalytic mechanism of the Ag/BiOI/g-C 3 N 4 may involve the promotion of the visible light–harvesting ability and inhibition of the recombination of photogenerated electron/hole pairs. Furthermore, the primary active groups in the system are identified as superoxide radicals (·O 2 − ) and hydroxyl radicals (·OH). Herein, some valuable insights into the development of innovative photocatalytic materials are offered for the effective removal of antibiotics from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Jiaqian Zhu,Jiaying Li,Yuying Li,Jia Guo,Xiang Yu,Liang Peng,Boping Han,Yi Zhu,Yuanming Zhang
Bismuth oxyiodide (BiOI) with 3D microspheres structure was prepared and used for adsorption of phosphate and photodegradation of dyes in phosphate-dye binary system for the first time. BiOI exhibited excellent adsorption capacity of phosphate up to 55.80 mg P/L and outstanding photocatalytic activities for all the cationic dyes in phosphate-cationic dye binary system. RhB was 100% photodegraded within 50 min, and the photodegradation rates of MB and FB reached 92% and 95% within 100 min, respectively. But in phosphate-anionic/neutral dye binary system, BiOI displayed only good adsorption performance of phosphate but showed no photodegradation performance for anionic or neutral dyes. The mechanism was proposed as that PO 4 3− adsorbed on the surface of BiOI, which changed from being neutral into being negatively charged, and then the cationic dyes were absorbed due to electrostatic attraction for photodegradation. The photodegradation was confirmed that the photogenerated electrons from the conduction band (CB) of BiOI which could reduce O 2 to ·O 2 − and associate with h + oxidized the cationic dyes. This work established a new approach of photodegrading organic dyes and adsorbing phosphate in waterbodies, and provided a new insight into wastewater treatment with two or more pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qian Li,Jing Hu,Haiqiang Wang,Zhongbiao Wu
Limited light absorption and severe charge recombination have been widely acknowledged as the two main obstacles restricting the application of P25 in NO photocatalytic conversion. In this work, an advanced heterojunction photocatalyst of Bi/BiOI/black TiO 2 was synthesized via an in-situ solid-state chemical reduction method. The black TiO 2 extended the light absorption to the full spectral region. It constructed a direct Z-scheme heterojunction with BiOI nanosheets, not only promoting the charge separation, but also preserving the strong oxidation ability of photogenerated holes in black TiO 2 and strong reducing ability of photogenerated electrons in BiOI. Thus, more •O 2 − and •OH radical could form when Bi/BiOI/black TiO 2 was subjected to visible light irradiation. Besides, the introduced Bi metal nanoparticles could also enhance the light utilization and served as a cocatalyst to accept the electrons. Therefore, enhanced NO photocatalytic oxidation activity was obtained, with the optimal sample Bi/BiOI/black TiO 2 exhibiting a high NO conversion efficiency of ~70% and NO x removal of ~45%. This work may provide a refreshing perspective for the design of heterojunction photocatalysts for efficient NO photocatalytic purification and other photocatalytic applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Hongxuan Qiu,Run Zhang,Yichang Yu,Rong Shen,Hongwen Gao
The powder-based photocatalytic material is often difficult on wide application and then loaded on a matrix for separating conveniently from the liquid. Submerged photocatalysts may not take advantage of the light energy adequately. Thus, this boundedness may reduce their utilization and potentially cause the secondary pollution on the environment. In this paper, the micron-sized silica sphere is used as a floating substrate, and the visible-light-driven photocatalytic material iodine oxygen bismuth is prepared onto the hollow silica microspheres. The composite spheres as the visible-light-driven photocatalytic material have been characterized by XPS, XRD, SEM, EDX, PL , etc. It confirmed that BiOI combined on the SiO 2 microsphere (mSiO 2 ) by Bi-O-Si. The photogenerated electrons of the composite have a low probability of recombination and have a narrow band energy (1.82 eV). The composite was used to photodegrade diesel-containing wastewater and rhodamine B, and the superoxide group (·O 2 − ) was found to be the main degradation active factor. And by GC–MS test, it is known that the superoxide group (·O 2 − ) can degrade long-chain alkanes into short chains or form branches. Detailed studies on the acute exposure experiments of Vibrio qinghaiensis sp.-Q67 and zebrafish embryos showed that the composites can effectively reduce the toxicity of BiOI and mSiO 2 .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Huiyong Yu,Mengyuan Gao,Gongke Wang,Yumin Liu
The widespread use of antibiotics such as tetracycline has led to significant risks to both environmental sustainability and public health due to their persistence in natural water systems. In this study, Sn-doped BiOI microspheres were successfully synthesized through a simple one-step hydrothermal method to achieve enhanced photodegradation of tetracycline in aqueous solution. After 40 min of visible light irradiation, the optimal Sn-doped BiOI photocatalyst exhibited an exceptional tetracycline degradation efficiency of 82.8 %, significantly surpassing the 56.0 % efficiency of pure BiOI. To understand the origins of the enhanced catalytic behavior, a series of characterization techniques, including XRD, SEM, XPS, UV–Vis DRS, PL, and electrochemical measurements, were performed to investigate the crystal structure, morphology, surface states, light absorption properties, and charge carrier recombination and separation dynamics of the catalysts. These analyses demonstrated that Sn doping substantially modified the microscopic structure, morphology, and optical properties of BiOI, thereby greatly improving its photocatalytic efficiency. Further analysis of Sn doping effects demonstrated significant enhancement in transport and separation of photocarriers within BiOI microspheres, thereby leading to substantially improved photocatalytic performance under visible light.
研究领域:
环境科学
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材料化学
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光催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2012
·
IF 4.173
Rong Hao,Xin Xiao,Xiaoxi Zuo,Junmin Nan,Weide Zhang
A novel microsphere-like BiOI hierarchical material was successfully synthesized by a one-step solution method at room temperature using polyvinylpyrrolidone (PVP) as structure directing reagent, its morphology, structure, surface area, photoabsorption were characterized, and the removal of tetracycline hydrochloride (TC) was evaluated under dark adsorption and visible light irradiation. It was shown that the BiOI microspheres formed in the precursor solution with PVP exhibit a mesoporous surface layer, 28.1 m 2 g −1 surface area, 1.91 eV band gap energy ( E g value), and twofold removal ability to tetracycline hydrochloride (TC), i.e. adsorptive separation and visible light photocatalytic degradation . The adsorption process of TC on BiOI microspheres can be described by pseudo-second-order kinetics model and both Freundlich and Langmuir equations well described the adsorption isotherm but the former is better. More importantly, the BiOI microspheres exhibit an excellent photocatalytic degradation and mineralization capability to TC under visible light irradiation, which comes from its electronic band structure, high surface area and high surface-to-volume ratio. In addition, the BiOI microspheres are stable during the reaction and can be used repeatedly, showing promising prospect for the treatment of TCs in future industrial application.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Songtao Zhong,Hui Zhou,Ming Shen,Yufeng Yao,Qiang Gao
It is vital for environment purification to design and prepare an artificial photocatalyst that can effectively separate photogenerated carriers and maintain the redox ability of system. In this paper, a g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 photocatalyst was rationally designed and successfully prepared via two-step in-situ transforming process. The results of X-ray diffraction, Fourier transform infrared spectroscopy , X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, and transmission electron microscopy confirm the successful synthesis of ternary g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts. The photocatalytic activities of all catalysts were assessed by the degradation of Rhodamine B (RhB) under simulated sunlight illumination. The g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts showed much higher photocatalytic activities than single g-C 3 N 4 , or BiOI and dual g-C 3 N 4 /BiOI. The results of electron spin resonance and active species trapping experiments revealed that h + and • O 2 − were responsible for the photodegradation of RhB, and a possible photogenerated carrier transport mechanism was proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jie Cui,Ruotong Zhu,Meiqi Ding,Guoli Chen,Shuhua Liang,Shaodong Sun
Construction of S-scheme heterojunction with 2D/2D structure can accelerate the carrier separation and migration owing to the induced built-in electric field, short carrier migration distance and large contact area. Herein, we develop a simple one-step solvent thermal method for the synthesis of novel Bi 2 O 3 -BiOI 2D/2D S-scheme heterojunction with intimate interfacial contact. As expected, the as-prepared Bi 2 O 3 -BiOI heterojunction presents higher visible-light driven photodegradation of tetracycline (TC), as well as rhodamine B (RhB), methyl orange (MO), and tetracycline hydrochloride (TC-HCl), than the counterparts. Besides, the potential degradation pathways of TC are elucidated and the toxicities of intermediates are assessed in detail. Significantly, the mechanism insight into S-scheme charge transfer mechanism in Bi 2 O 3 -BiOI 2D/2D heterojunction is uncovered in depth by density functional theory calculations and a series of experimental evidences. This work affords a useful inspiration on constructing high-performance BiOI-based photocatalysts via engineering of heterojunction and morphology for organic hazards removal.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）