Catalysts
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2019
·Vol. 9
·期 10
·795
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IF 3.444
Yuxiang Yan,Hua Yang,Zao Yi,Tao Xian
In this work, we have synthesized BiOCl nanoplates (diameter 140–220 nm, thickness 60–70 nm) via a co-precipitation method, and then created Bi nanoparticles (diameter 35–50 nm) on the surface of BiOCl nanoplates via a NaBH4reduction method. By varying the NaBH4concentration and reaction time, the evolution of Bi nanoparticles was systematically investigated. It is demonstrated that with increasing the NaBH4concentration (at a fixing reaction time of 30 min), BiOCl crystals are gradually reduced into Bi nanoparticles, and pure Bi nanoparticles are formed at 120 mM NaBH4solution treatment. At low-concentration NaBH4solutions (e.g., 10 and 30 mM), with increasing the reaction time, BiOCl crystals are partially reduced into Bi nanoparticles, and then the Bi nanoparticles return to form BiOCl crystals. At high-concentration NaBH4solutions (e.g., 120 mM), BiOCl crystals are reduced to Bi nanoparticles completely with a short reaction time, and further prolong the treatment time leads to the transformation of the Bi nanoparticles into a two-phase mixture of BiOCl and Bi2O3nanowires. The photodegradation performances of the samples were investigated by choosing rhodamine B (RhB) as the model pollutant and using simulated sunlight as the light source. It is demonstrated that an enhanced photodegradation performance can be achieved for the created Bi@BiOCl hybrid composites with appropriate NaBH4treatment. The underlying photocatalytic mechanism was systematically investigated and discussed.Keywords:BiOCl nanoplates;Bi nanoparticles;NaBH4reduction;Bi@BiOCl hybrids;photodegradation performance
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
CHEMICAL ENGINEERING JOURNAL
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2014
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IF 4.058
Ting Zhang,Yaobin Ding,Heqing Tang
An efficient singlet oxygen generation system was first developed by using Bi(V)/Bi(III) composites for degrading organic pollutants . The composites were prepared by hydrolyzing NaBiO 3 in HCl solutions. As monitored by various techniques, it was found that the morphology and composition of the composites were able to be tuned by changing the molar ratio of HCl to NaBiO 3 in the preparation process, which was optimized at 2.0. Due to the efficient generation of singlet oxygen, the use of the composite (0.75 g L −1 ) resulted in almost complete degradation of bisphenol A (0.2 mmol L −1 ) in 20 min, with a pseudo-first-order kinetic constant of 0.14 min −1 . The dominant reactive species in the degradation system were confirmed to be singlet oxygen, which was generated from the release of the lattice oxygen in the composite. The good performances of the concerned singlet oxygen generation system are general for degrading different organic pollutants.
研究领域:
环境科学
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化学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Huanan Cui,Jianying Shi,Hong Liu
NaBiO 3 and Bi(NO 3 ) 3 were used to synthesize Bi-doped NaTaO 3 . The influence of the Bi chemical state on the photocatalytic activity was investigated using X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and diffused reflectance spectroscopy to study the structure, chemical state and light absorption characteristics, respectively. The photocatalytic activity was evaluated by the H 2 evolution water splitting reaction. The monoclinic phase of NaTaO 3 remained intact for the two Bi-doped samples, but the Ta–O–Ta bond was distorted from 180° after Bi doping. XPS results indicated that Bi 3+ was doped into NaTaO 3 with the Bi(NO 3 ) 3 precursor, while Bi 5+ and Bi 3+ were doped into NaTaO 3 with the NaBiO 3 precursor. The two samples showed identical light absorption, where doping with Bi extended the light absorption to long wavelength light as expected. However, Bi 3+ doping did not promote the photocatalytic activity of NaTaO 3 , while Bi 5+ and Bi 3+ doping did. The distorted Ta–O–Ta bond from 180° due to doping with Bi was detrimental for charge carrier transfer in the photocatalytic process. In contrast, the vacancies or defects in the NaTaO 3 lattice induced by Bi doping for charge balance were beneficial for charge carrier separation. The opposing action of these two factors resulted in the activity of the Bi 3+ -doped sample being comparable with pristine NaTaO 3 . For Bi 5+ - and Bi 3+ -doped NaTaO 3 , a high concentration of defects was induced by the high valence Bi 5+ ion and this led to its higher photocatalytic activity. Our results indicated that charge carrier transfer is a priority factor in the photocatalytic process and the doping of a high valence ion in the ABO 3 structure is a way to promote the separation of charge carriers.
研究领域:
材料科学
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光催化
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Qianqian Chen,Yuancai Lv,Junjie Pan,Weihan Chen,Gengwu Zhou,Xiaobing Yang,Kejun Cheng
Antibiotics, particularly tetracycline (TC), are extensively used in medicine, agriculture, animal husbandry, and the food industry due to their bacteriostatic and antibacterial properties. However, the widespread use of antibiotics has led to serious consequences, particularly in the form of water pollution and the emergence of numerous antibiotic-resistant microorganisms. Therefore, it is essential to implement effective measures to mitigate these environmental impacts. In this paper, we introduce a novel BiOCl@Bi-carbon heterojunction derived from Bi-MOF. The synthesized samples were thoroughly characterized through various techniques. The results demonstrate that BiOCl was successfully synthesized on the surface of Bi-MOF via in situ transformation, and that Bi-MOF was converted into Bi-doped porous carbon (Bi-carbon) after high-temperature annealing treatment. The coupling of BiOCl with Bi-carbon significantly enhances the photocurrent density. The photocatalytic activity of the samples was effectively evaluated by measuring the degradation of TC, with BiOCl@Bi-carbon demonstrating the highest photocatalytic efficiency, achieving a degradation rate of 96.27 % for TC. Additionally, BiOCl@Bi-carbon exhibits excellent stability. Its outstanding photocatalytic performance indicates significant potential for practical applications. Furthermore, we analyze the mechanism underlying the photocatalytic degradation of TC at the end of the study.
研究领域:
环境科学
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材料科学
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化学
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光催化
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhengkun Yu,Yunlei Zhou,Xingyu Liu,Shuqi Gong,Tianyi Sun,Huanshun Yin,Jingting Kang
A Bi/BiOCl/Bi(In 3+ )-MOF Z-scheme heterojunction enriched with positive electric charges on the surface caused by In 3+ doping was prepared by a one-step solvothermal method. Photodegradation of antibiotics (tetracycline, amoxicillin, ceftriaxone), antibiotic-resistant Escherichia coli (AR E. coli ), the tetA gene they carried, and Fusarium graminearum was investigated. The experimental results showed that Bi/BiOCl/Bi(In 3+ )-MOF sample possessed efficient photodegradation activity, with a removal of 10 7.34 CFU·mL −1 against AR E. coli in 80 min, 83.0 % and 4.89 log 10 copies·mL −1 for tetracycline and tetA gene in 120 min, respectively. Zeta potential test and adsorption capture experiment confirmed that Bi/BiOCl/Bi(In 3+ )-MOF surface was rich in positive charges and had a strong nanoconfinement effect on negative-charged bacteria and ARGs, which shorten the time for the active substances produced by photocatalysis to come into contact with bacteria and ARGs, thereby improving the photocatalysis degradation effect. Finally, Bi/BiOCl/Bi(In 3+ )-MOF sample was applied and discussed for the removal of complex colonies from duck farm wastewater.
研究领域:
环境科学
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微生物学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Zixun Fang,Yao Zhou,Yang Yang,Yidong Hou,Can Yang,Jinshui Zhang
Artificial Z-scheme photocatalytic systems, inspired by natural photosynthesis, have been widely employed for pollutant removal. In this study, we fabricated a ternary Z-scheme Bi 2 O 3 /Bi/porous carbon nitride (PCN) heterojunction with an intimately coupled interface through a simple EG-assisted solvothermal approach to improving photocatalytic performance of NO oxidation. The in-situ generated metallic Bi acts as an electron mediator, effectively accelerating the separation and transfer of photoexcited carriers. The unique Z-scheme charge transfer mechanism provides the strong redox abilities and isolates the active sites for specific reactions, thus promoting photocatalytic NO oxidation activity. As a result, the optimized Bi 2 O 3 /Bi/PCN sample achieved a NO removal efficiency of 94.6%, outperforming single-component catalysts and most previously reported heterojunction-based photocatalysts. Additionally, in-situ Fourier transform infrared spectroscopy was employed to propose the NO removal mechanism, offering valuable insight into the conversion pathway. Such a heterogeneous Z-scheme photocatalytic system with a strong redox ability, high charge-separation efficiency, and long-term stability, demonstrates significantly enhanced photoactivity for pollutant removal and is expected to attract increasing interest for other photocatalytic applications.
研究领域:
环境科学
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材料科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Jingjing Wang,Zhiwei Liu,Liying Wang,Lu Li,Qian Liu,Zhiwei Liu,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
Type II heterojunction photocatalysts possessed excellent redox properties and had great potential for environmental remediation applications. In this paper, a novel Bi source of Bi-MOF was created by using NaBiO 3 . Additionally, KCl was incorporated to contest Bi-MOF for the Bi source, with the objective of generating floral BiOCl. Subsequently, heterostructures based on metal-organic skeletons (MOFs) were constructed with Bi-MOF and BiOCl, with the aim of exposing the (002) crystal faces of BiBDC. The modification of the (002) crystal surface was employed to create holes or generate more photogenerated electrons, resulting in efficient degradation of rhodamine B (RhB) and simultaneous reduction of hexavalent chromium. The heterogeneous structure demonstrated a degradation rate of 97 % for rhodamine B (RhB) after reaching adsorption equilibrium in 30 min of dark reaction and 10 min of visible light irradiation. Furthermore, the reduction rate of hexavalent chromium (Cr (VI)) was 95.5 % after reaching adsorption equilibrium in 30 min of dark reaction and 70 min of visible light irradiation . The results of the cycling experiments demonstrated that both 1:1 BBOC and 1:3 BBOC retained their structural integrity following four cycles. The active species trapping results indicated that the hole radicals (h + ) and electrons were responsible for the degradation of RhB and the reduction of hexavalent chromium, respectively. This study also revealed the degradation pathways and mechanisms of heterojunctions, providing new ideas for the preparation of photocatalysts for environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2025
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IF 6
Chenglin Zhang,Jiangpeng Li,Su Zhan,Wenjun Jiang,Feng Zhou
The notorious issue of hazardous growth in ballast water and its potential for widespread diffusion pose significant challenges to the sustainable development of maritime transportation economies. Here, a simplified and sustainable method is presented for synthesizing metallic Bi-doped Bi 2 Sn 2 O 7 , assisted by H 2 O 2 to construct a Fenton-like system for the photocatalytic inactivation of marine bacteria. The introduction of metallic Bi is beneficial to the overall sterilization improvement, notably, the 3BBSO (Bi/Bi 2 Sn 2 O 7 ) exhibits optimal selectivity in marine bacteria inactivation, with improved decomposition of H 2 O 2 . The combination of metallic Bi and additional H 2 O 2 contributes to the separation of photo-generated charges and the production of •OH radicals, thereby enhancing sterilization efficiency in natural seawater. Furthermore, characterization results demonstrate that the metallic Bi act as a pivotal active sites for the enrichment of free electrons and adsorption centers for •OH, increasing the light absorption range and promoting photocatalytic bacterial inactivation. DFT simulations suggest that metallic Bi provides an optimal position for H 2 O 2 abundance, utilizing aggregated electrons to generate more •OH radicals. This sustainable framework offers valuable insights into the treatment of ballast water by deactivating the concentration of marine microorganisms.
研究领域:
环境科学
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微生物学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2020
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IF 6.289
Jing Wang,Kehui Xue,Ren He,Tianli Yang,Yi Peng,Ying Yan,Yuanlan Wang,Hui Wang,Wenlei Wang
It is imperative to find an environmentally friendly method to design photocatalysts for CO 2 reduction. In this work, ultrafine Bi 6 O 7 FCl 3 nanotubes were synthesized and used as a template to realize the reverse growth of Bi-quantum-dots at the interface of Bi@Bi 6 O 7 FCl 3 -X (X = 20/60/90) nanotube. The facile construction of the (012) plane on Bi quantum dots, with a diameter of approximately 2 nm, was achieved by electron beam irradiation. [Bi 6 O 7 ] 4+ cations and [Cl 4 ] 4− anions were first generated through the hydrothermal reaction, and the interaction between the anions and cations resulted in the [Bi 6 O 7 Cl 4 ] unit intermediate, in which the negatively charged [Cl 4 ] 4− separated the [Bi 6 O 7 ] 4+ layers from each other. In addition, F atoms, with a strong electronegativity, entered the [Cl 4 ] 4− layers, replacing a portion of the Cl atoms to form a new [FCl 3 ] 4− layer. The binding energy of Bi was reduced by 0.16 eV, as shown by the XPS results. The photocatalytic activity of Bi@Bi 6 O 7 FCl 3 -X (X = 20/60/90) was determined by the production of CO from CO 2 . After 4 h of monitoring, the CO production rate of Bi@Bi 6 O 7 FCl 3 –90 was 15.79 μmol·g −1 ·h −1 , which was 6.29 times that of Bi 6 O 7 FCl 3 . After 5 cycles, the CO production rate of Bi@Bi 6 O 7 FCl 3 -90 remained at approximately 61.07 μmol·g −1 .
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
Sustainable Energy & Fuels
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2024
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IF 5
Yuting Wu,Keru Cao,Jun Yan,Yuheng Zhang,Biao Zhang,Yanan Wang,Yong Yang,Dacheng Zhou,Qi Wang,ChunXia Liu
Electrochemical detection techniques are unable to accurately distinguish isomers with similar structures and properties due to the poor stability and selectivity of some sensors and their susceptibility to environmental interference. Bimetallic synergistically synthesized MOF materials have various types of highly ordered pores and can be used as adsorbent materials and catalyst carriers. Therefore, a composite material was developed to prepare its derivative Cu/Bi@C using a bimetallic organic skeleton (Cu/Bi-MOF) as a precursor, inheriting the large number of active sites on the surface of the MOF and large surface area, while improving the electrochemical response signal. The morphology and structure of the synthesized Cu/Bi@C composites were tested and analyzed by XRD, SEM and other characterization methods, and the electrochemical response of the Cu/Bi@C nanocomposites was analyzed by using an electrochemical workstation. In this study, a simple and highly selective electrochemical method was developed for the simultaneous determination of catechol and catechol quinone. Differential pulse voltammetry (DPV) was used for the simultaneous detection of HQ and CC. The results showed that the Cu/Bi@C electrode was able to efficiently and highly selectively detect both isomers. The Cu/Bi@C electrode could detect HQ and CC in the range of 2–600 μM and 2–800 μM, respectively, under the detection environment of pH = 6.0. The detection limits were 0.08 μM and 0.11 μM (S/N = 3), respectively. The sensor was successfully applied to real samples and showed low detection limits, good recoveries, high selectivity, stability and reproducibility. This provides a new idea for electrochemical detection and is expected to be applied in several fields.
研究领域:
分析化学
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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
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Xuelian Liu,Min Ye,Fangyuan Lin,Ling-ou Yang,Jie Lin,Yaqi Jiang,Dongjie Tian,Xi Chen
Ammonia (NH 3 ) is a common pollutant in water and an important indicator of environmental pollution. Its determination is of great significance to environmental protection. We synthesized ligand-free Cs 2 AgInCl 6 :Bi at room temperature to establish a low toxicity, rapid, and simple fluorescence assay for the selective determination of NH 3 in water. Studies have shown that there is a good linear relationship with the concentration of NH 3 in the range of 1.00 ∼ 20.00 mg L -1 and the determination limit is 0.40 mg L -1 . The selectivity for NH 3 is higher than other substances may exist in the water (eg. Na + , SO 4 2- ). Subsequently, X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, time-resolved fluorescence spectroscopy and ultraviolet absorption spectra were used to investigate the possible mechanism of NH 3 reaction with Cs 2 AgInCl 6 :Bi. The water samples of lakes and rivers were analyzed by the proposed method and indophenolblue method, the results shown that there is no significant difference between the two methods. The reliable results (0.1%< RSD < 4.1%) and the satisfactory recovery (99.0%∼102.5%) were obtained by direct determination method and mark recovery method. Therefore, the simple, rapid and low-toxicity fluorescence method established in this work provides a promising approach for NH 3 analysis in environmental water.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yuan Zhao,Qingshuang Wang,Dongming Yin,Shouliang Li,Chunli Wang,Long Liang,Shaolei Zhao,Chunmin Zhang,Limin Wang,Yong Cheng
The high dehydrogenation temperature of α-AlH 3 has always been an important factor hindering its development. In order to solve this problem, we synthesize Bi-MOF by hydrothermal method and burn it under inert gas to obtain Bi@C, which is used as catalyst ( x Bi@C, x = 3, 5 and 7 wt%) to improve the hydrogen desorption performance of α-AlH 3 . The dehydrogenation onset temperature of α-AlH 3 +5 wt% Bi@C drop to 80.4 °C, which is reduced by 43.4% compared with pure α-AlH 3 . At 120 °C, it can provide a stable hydrogen capacity of 7.45 wt%. In contrast, pure α-AlH 3 releases only 6.66 wt% hydrogen at the same time. The density functional theory calculations further indicate that the existence of Bi@C catalyst can make the Al–H bond length increase, more conducive to the release of hydrogen. The results show that the synergistic effect of Bi and porous carbon in Bi@C materials can improve the hydrogen desorption kinetics of α-AlH 3 , providing a good prospect for the application of α-AlH 3 in hydrogen storage .
研究领域:
材料科学
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氢能存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）