JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Ting Wu,Qinghua Liang,Lin Tang,Jialin Tang,Jiajia Wang,Binbin Shao,Shanxi Gong,Qingyun He,Yuan Pan,Zhifeng Liu
A high-performance piezoelectric photocatalyst (V-BiOIO 3 /FTCN) was constructed to improve removal efficiency of tetracycline hydrochloride (TCH). The role of V-BiOIO 3 in the composite was to introduce piezoelectric effect and construct S-scheme heterojunction photocatalyst with fish scale tubular carbon nitride (FTCN). The morphology, structure, chemical composition and optoelectronic characteristics of the as-prepared photocatalysts were studied by SEM, TEM, XRD, XPS and UV-Vis DRS. Combined with UV-Vis DRS, XPS valence band, Mott-schottky curve and theoretical calculations, the mechanism of TCH degradation was deeply analyzed. A series of degradation experiments showed that the V-BiOIO 3 /FTCN could effectively degrade TCH, and the removal efficiency was further improved under the action of ultrasound. Importantly, the further immobilized V-BiOIO 3 /FTCN/MS could float on the water surface to degrade TCH without additional stirring, which facilitated the recovery of photocatalysts and showed excellent practical application value. This work provided a reference for the design and immobilization of carbon nitride-based piezoelectric photocatalysts.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
MOLECULES
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2023
·Vol. 28
·期 13
·5098
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IF 4.6
Xiangyuan Kong,Longwen Cao,Yuxing Shi,Zhouze Chen,Weilong Shi,Xin Du
Utilization of semiconductor photocatalyst materials to degrade pollutants for addressing environmental pollution problems has become a research focus in recent years. In this work, a 2D/2D S-scheme crystalline carbon nitride (CCN)/BiOIO3(BOI) van der Waals heterojunction was successfully constructed for effectively enhancing the degradation efficiency of antibiotic contaminant. The as-synthesized optimal CCN/BOI-3 sample exhibited the highest efficiency of 80% for the photo-degradation of tetracycline (TC, 20 mg/L) after 120 min visible light irradiation, which was significantly higher than that of pure CCN and BOI. The significant improvement in photocatalytic performance is mainly attributed to two aspects: (i) the 2D/2D van der Waals heterojunction can accelerate interface carriers’ separation and transfer and afford sufficient active sites; (ii) the S-scheme heterojunction elevated the redox capacity of CCN/BOI, thus providing a driving force for the degradation reaction. The degradation pathways of TC for the CCN/BOI composite were investigated in detail by liquid chromatography-mass spectrometry (LC-MS) analysis. This work provides a design idea for the development of efficient photocatalysts based on the 2D/2D S-scheme van der Waals heterojunctions.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jien Ye,Li Tang,Yiyi Xu,Zhouyun Xie,Ni Zhang,Jingfen Xia,Xuran Liu,Dongbo Wang,Guojing Yang
The escalating pollution of aquatic ecosystems by antibiotics has triggered substantial public concerns, with ciprofloxacin (CIP) being a representative pollutant. Bismuth iodate (BiOIO 3 ), a novel 2D bismuth-based polar photocatalyst, is a promising material for the photodegradation of antibiotics. However, its practical application is hindered by its wide bandgap and rapid charge recombination. Therefore, this study aims to construct a 2D/2D g-C 3 N 4 /BiOIO 3 Z-scheme heterojunction (CNB) via a one-step hydrothermal method to overcome these limitations. The optimal CNB-2 (5 wt% g-C 3 N 4 ) achieved 91% CIP degradation within 60 min (rate constant k=0.04369 min -1 ), 3.8-fold and 2.9-fold higher than pure g-C 3 N 4 and BiOIO 3 , respectively, with a 62% total organic carbon (TOC) removal rate. The degradation pathways primarily involve the ring opening of the piperazine ring and decarboxylation of the quinolone structure. Radical trapping and EPR tests identified that ·OH and ·O 2 - were the main active species. CNB-2 maintained >90% degradation efficiency over pH 3-9 and retained 86.8% activity after 5 cycles, showing excellent stability. Its superior performance arose from the 2D heterostructure’s large specific surface area and Z-scheme charge transfer, which enhanced carrier separation while preserving strong redox capacity. This work offers a practical strategy for designing efficient photocatalysts to remediate antibiotic contaminated water.
研究领域:
环境科学
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材料科学
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光催化
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水处理
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Tian Fu,Hanbing Zhang,Linxing Wang,Tao Zhang,Jing Sun,Kun Liu,Luo Guo,Pengfei Wang,Sihui Zhan
Two-dimensional (2D) materials exhibit a strong propensity for exciton generation upon photoexcitation compared to bulk counterparts. However, as exciton relaxation processes, intersystem crossing (ISC) and exciton dissociation always compete in the carrier dynamics. This study presents a strategy to decouple exciton dissociation and ISC by introducing a nitrogen-doped biochar (NBC) as the ISC center to modify Z-scheme heterojunction (BiOBr/BiOIO 3 , BB). NBC-BB achieved a 1.75 times interfacial driving force compared to BB and suppressed the exciton binding energy (E b ) from 107 meV to 85 meV. Moreover, due to the spontaneous incorporation of Br into NBC during the preparation process, the singlet and triplet energy level difference (ΔE ST ) was shortened by 0.079 eV to intensify ISC on NBC. The constructive collaboration of exciton dissociation and ISC guaranteed the generation of reactive oxygen species (ROS) with strong redox potential and selectivity, achieving efficient removal of refractory organic pollutants under visible light. The bolstered oxygen adsorption indicated effective oxygen activation capability of NBC-BB, leading to a 1.4-fold and 3.1-fold increase in the generation efficiency of 1 O 2 and •O 2 − , respectively. This study also presented experiments on various influencing factors, cyclic stability, and a feasible continue-flow system, showcasing the stability and potential for the practical application.
研究领域:
材料科学
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环境科学
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光化学
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催化
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Xia Zhang,Xitong Yang,Bing Liu,Guifen Zhu,Jing Fan
An approach of simultaneous iodine doping and heterojunction fabricating with basic bismuth salt was proposed, Based on this, a novel I/BiOIO 3 /[Bi 6 O 6 (OH) 3 ](NO 3 ) 3 ∙1.5H 2 O (I/BiOIO 3 /BHN) photocatalyst was prepared. The photocatalytic activity was evaluated by the degradation of multiple refractory pollutants (rhodamine B, methyl orange, phenol , bisphenol A, bisphenol B, bisphenol Z) in water under solar light irradiation. Compared with single photocatalyst, the optimized sample displayed the reaction rate constant of 0.1606 min −1 , which was 69.8, 11.4 and 2.2 times of individual [Bi 6 O 6 (OH) 3 ](NO 3 ) 3 ∙1.5H 2 O, BiOI and BiOIO 3 , respectively. The performance improvement was attributed to the inhibition of charge carrier recombination by type II heterojunction formation and the expanded solar capture range caused by the springboard effect of iodine impurity level. The photocatalytic mechanism of I/BiOIO 3 /BHN was hole oxidation , followed by·OH oxidation. Besides, the I/BiOIO 3 /BHN photocatalyst in bulk structure with micrometer size and high-density could be easily separated and recovered by simple sedimentation, confirming its good application prospect in the wastewater treatment .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2022
·Vol. 97
·期 5
·1326-1335
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IF 3.709
Dandan You,Ming Li,Zhuren Pan,Zhenyang Yin,Ning Wang
BACKGROUND 2,4-Dichlorophenol (2,4-DCP) is widely used as a preservative, pesticide, germicide, etc. However, it is very damaging to organisms and the environment, and it is difficult to decompose because of its high stability. To improve the photocatalytic ability of photocatalysts for degrading hazardous substances, like 2,4-DCP, constructing heterojunction is an effective strategy because of its restraint of electron–hole recombination and extension of light absorption spectra. RESULTS A novel photocatalyst Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 was successfully synthesized by one-step in-situ co-crystallization method. The formation of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 composite was confirmed by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectrometer (FTIR spectrometer) and transmission electron microscope (TEM). The obtained optimal composite exhibited an excellent photocatalytic performance of degrading 2,4-DCP with an efficiency of 95% under visible-light irradiation. The trapping experiments indicated that superoxide radicals, electrons, and singlet oxygen played vital roles in 2,4-DCP decomposition and confirmed the dual Z-scheme heterojunction structure of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 . Furthermore, the possible reaction pathway was deduced based on the trapping experiments and the intermediate products detected by liquid chromatography tandem mass spectrometry. CONCLUSION The photocatalytic performance of Bi 7 O 9 I 3 /BiOIO 3 /g-C 3 N 4 was enhanced because the more efficient separation and transfer of photogenerated charge carriers was achieved due to the formation of dual Z-scheme heterojunction. This work presented a simple and feasible synthesis method to prepare a ternary photocatalyst for improving the photocatalytic ability, and it can assist in further understanding the reaction mechanism of 2,4-DCP degradation. © 2022 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Xinglin Li,Pengfei Zhu,Yu Chen,Maojie Zhang,Yunhui Jiang
In this paper, Co 2+ was successfully assembled into a complex by solvothermal method with meso-tetra (4-carboxyphenyl) porphyrin (TCPP), and then a novel P/BiOIO 3 /Co-TCPP inorganic-organic composite photocatalytic material was prepared by one-pot solvothermal method. It was found that after 60 min of reaction under visible light, the degradation rate of the preferred P/BiOIO 3 /Co-TCPP composite material for 20 mg/L oxytetracycline hydrochloride (OTC) reached 88.15 %, with its pseudo-first-order kinetic model fitting constant measured at 0.03852 min −1 . It was 5.12 and 1.52 times that of BiOIO 3 and P-doped BiOIO 3 respectively, and there was no significant decrease in activity after three consecutive uses. Meanwhile, the noxiousness of the OTC solution after photocatalytic degradation by this catalyst was significantly reduced. The characterization results indicate that the primary factor contributing to the improved activity is the P/BiOIO 3 /Co-TCPP catalyst can be attributed to the doping of BiOIO 3 by P and the coupling of Co-TCPP to BiOIO 3 , which significantly improves the catalyst's response ability to visible light. Meanwhile, P/BiOIO 3 and Co-TCPP form a Z -scheme heterojunction, which greatly facilitates the separation of photogenerated carriers. Finally, the electron transfer mechanism and possible degradation pathways of the photocatalytic degradation of OTC by P/BiOIO 3 /Co-TCPP were proposed. This study provides a feasible and effective method for the modification of BiOIO 3 -based heterojunction photocatalysts and the treatment of antibiotics in water bodies.
研究领域:
环境科学
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材料化学
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光催化
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水处理
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有机-无机杂化材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）