JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Muhua Chen,Yiping Liu,Ju Liu,Zilin Kan,Chenhui Sun,Yuqing Wang,Bo Fu,Xinbao Zhu
Recently, photocatalytic production of H 2 O 2 by semiconductors emerges as a green and potential method for green and sustainable H 2 O 2 synthesis. In this work, a g-C 3 N 4 /CAU-17 composite with heterojunction structure was fabricated. There is a tight interface contact between g-C 3 N 4 and CAU-17. And the g-C 3 N 4 nanosheets was uniformly wrapped on CAU-17 surface. In the hybrid catalyst, CAU-17 provides a high surface area for g-C 3 N 4 dispersion and the integration of g-C 3 N 4 boosts the visible light response. Results showed that the H 2 O 2 yield is 419.0 μmol . L −1. h −1 over g-C 3 N 4 /CAU-17 sample, which is 1.59 and 7.83 fold enhancements to bare g-C 3 N 4 and CAU-17 counterparts. This work sheds light on the design of CAU-17-based composite photocatalysts and provides insights into H 2 O 2 synthesis.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
DALTON TRANSACTIONS
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2022
·Vol. 51
·期 29
·10992-11004
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IF 4.569
Feihu Zhang,Xinyan Xiao,Yu Xiao
A novel type II BiOCl/CAU-17 2D/2D heterostructure photocatalyst was synthesized by in situ growth of ultrathin BiOCl on the surface of CAU-17 nanorods through a solvothermal process. The 2D/2D heterostructures endow the BiOCl/CAU-17 heterojunction with a large specific surface area and tight interfacial contact, which can provide sufficient channels for carrier migration. The introduction of CAU-17 can enhance the light absorption ability of BiOCl/CAU-17 photocatalysts. Furthermore, the staggered type II heterostructure energy band alignment formed between BiOCl and CAU-17 can promote the separation of photoexcited carriers. The improved performance for carrier migration and light absorption was evaluated by SEM, TEM, BET, EIS, and DRS tests. Transient photocurrent response and photoluminescence tests confirmed the improvement in separating photoexcited carriers. The optimal 70% BiOCl/CAU-17 sample exhibited the highest photocatalytic degradation efficiency of 96.3% for RhB and 85.5% for TC, under 90 min of simulated solar light irradiation. Its apparent first-order rate constant k values are 0.02947 and 0.01955 min−1, respectively, being 48.31 and 19.75 fold higher than those of CAU-17, and 7.61 and 1.84 fold higher than those of BiOCl. The free radical scavenging experiment results showed that h+ and ˙O2− are the prime active species during the photodegradation process. Hence, a possible photocatalytic mechanism of the type II BiOCl/CAU-17 heterojunction was proposed.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 10
·13382-13395
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IF 2.478
Yang Lin,Xin Yanmei,Yao Congfei,Miao Yuqing
As an organic–inorganic hybrid material, metal organic frameworks (MOFs) has a great development prospect in the field of photocatalysis. Herein, the in situ growth of Bi-based MOF (CAU-17) on Bi 2 WO 6 was utilized to obtain Bi 2 WO 6 /CAU-17 photocatalyst by a simple solvothermal transformation method. Bi 2 WO 6 can be used both as template and Bi source. The structure and morphology of Bi 2 WO 6 /CAU-17 composites were characterized by X-ray diffraction patterns, X-ray photoelectron spectroscopy, Fourier transform infrared spectra, UV–vis diffuse reflectance absorption spectra and scanning electronic microscopy, and transmission electron microscope. The results showed Bi 2 WO 6 /CAU-17 composites were successfully constructed by growing CAU-17 in situ on Bi 2 WO 6 . Compared with pure Bi 2 WO 6 and CAU-17, Bi 2 WO 6 /CAU-17-1 h composite exhibited excellent photocatalytic activity for the degradation of Rhodamine B, and its rate constant was 0.02083 min −1 . In addition, the quantum yield and space time yield of the obtained photocatalyst were 2.56 × 10 −6 molecules/photon and 1.28 × 10 −7 molecules/photon·mg, respectively. Bi 2 WO 6 /CAU-17 also exhibits better values of the modified FOM (figure of merit). This method provides a potential opportunity for the development of in situ growth of similar MOF materials for water treatment and other possible applications in the future.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Linhua Mi,Bin Chen,Xin Xu,Siting Cai,Yajun He,Yang Wei,Yaming Jiang,Chaoyang Zheng,Shenghong Zhong,Wenbin Hu,Yan Yu
Modulating the morphology of metal-organic frameworks (MOFs) has been identified as an effective strategy for enhancing the electrocatalytic performance of CO 2 reduction reactions (CO 2 RR). In this study, CAU-17 MOFs ([Bi(BTC)(H 2 O)]·2 H 2 O·MeOH) were prepared via a sonication-assisted method at room temperature, which is considered a simpler technique compared to the conventional hydrothermal method . Additionally, the morphology of CAU-17 MOFs was further regulated by incorporating a rare-earth metal (La), resulting in the observation of two distinct structures, i.e. CAU-17 hexagonal prism (CAU-17-HP) and CAU-17 layer (CAU-17-Layer). Compared to CAU-17-HP, CAU-17-Layer exhibits an excellent selectivity towards formate with the maximum Faradaic efficiency of 95.5% at − 1.1 V RHE in an H-cell. Subsequently, the limited catalytic activity of CAU-17-Layer was boosted by anchoring nano CeO 2 onto its surfaces (CeO 2 @CAU-17-Layer). The as-prepared composite catalyst demonstrated outstanding performance in the conversion of CO 2 to formate, with a current density surpassing − 100 mA cm -2 at potentials more negative than − 1.0 V RHE and reaching − 200 mA cm -2 at − 1.5 V RHE in a flow cell. This study demonstrates the significant potential of morphology-engineered and rare-earth metals composited MOFs in facilitating highly efficient reduction of CO 2 .
研究领域:
材料科学
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电化学
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环境科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
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IF 3.5
Zhang Yu,Xiao Xinyan,Wang Fei,Lu Ting,Cheng Xia
Photocatalytic degradation of dye wastewater has great potential due to its eco-friendly, simple, and solar energy-based characteristics. In this work, an energy-saving and convenient precipitation method was explored to compound two classical photocatalyst materials BiOBr and CAU-17. The Z-scheme heterojunction decreases the agglomeration of the BiOBr nanosheets and addresses the issue of the low photogenerated carrier participation rate of CAU-17. The solvothermal method was used to prepare CAU-17 nanorods, and then BiOBr nanosheets were grown on them at room temperature to fabricate BiOBr/CAU-17 composites. The samples were characterized by XRD, SEM, TEM, XPS, DRS, PL, EIS, and other techniques. The photodegradation performance was tested using Rhodamine B (RhB) as the model pollutant. The 80% BiOBr/CAU-17 composite (0.1 g/L) exhibited a degradation rate of 99.41% for RhB under simulated sunlight in 60 min, with an apparent rate constant of 0.0631 min⁻ 1 , which is 3.45 times faster than pure BiOBr and 315.5 times faster than CAU-17. Free radical capture and EPR tests confirmed that · O 2 ⁻ and h⁺ were the main active species in the process, and a reasonable photocatalytic mechanism is proposed. Additionally, cyclic tests are conducted to confirm the stability and durability of the composite, proving the potential of BiOBr/CAU-17 composites for efficient and sustainable photocatalytic applications.
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
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Xiaoyuan Luo,Zhenze Han,Xuetian Guo,Yu Wei,Yan Gao
Bismuth-based metal–organic frameworks (MOFs) have shown promise in the electrocatalytic CO2 reduction reaction (ECO2RR) due to their abundant active sites and high selectivity. In this study, microfluidic synthesis technology was innovatively introduced to achieve the continuous synthesis of the bismuth-based MOF material CAU-17. Compared with the hydrothermal method, by adjusting the flow rate while keeping the temperature and Bi3+ reaction concentration constant, the particle size and morphology could be effectively controlled, and the synthesis time was reduced to 1/36 of that of the traditional method. CAU-17 particles with different sizes showed different reactivity sensitivities to the ECO2RR. CAU-17-F60 with the smallest particle size showed the highest Faraday efficiency of 92.79% for formate at −1.2 VRHE, along with a larger electrochemically active surface area and lower interfacial resistance. It could be electrolyzed stably for 12 h, during which the average FEformate remained above 90% all the time. This study thoroughly demonstrates the significant potential of microfluidic technology in the precise control of fine structures and performance optimization of MOF catalysts, offering a new idea and a generalizable path for the sustainable preparation of efficient ECO2RR catalysts.
研究领域:
材料化学
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电催化
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纳米材料
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环境化学
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能源化学
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产品关联
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Fei Yu,Haoyuan Yin,Jie Li,Tianjie Chen,Liping Sun,Jie Ma
Developing bismuth-carbon composites that can alleviate the stress concentration and volume expansion problems during the Bi/BiOCl conversion reaction is crucial for electrochemical desalination, especially Cl − removal technology, but it is still a great challenge. Here, we report a B/N co-doped bismuth encapsulated in carbon tubes. Using CAU-17 as a template, a carbon tubular material with multiple carbon layer structures was successfully synthesized by co-pyrolysis with BCN nanosheets, which achieved effective encapsulation of Bi. As the pyrolysis temperature increased, the continuous evaporation of Bi prompted the transformation of the carbon tube structure from a soft carbon to a hard carbon structure interconnected by multi-layered short graphene flakes. This alleviated the instability of the electrode caused by the volume expansion during the Bi/BiOCl transformation reaction and also provided additional ion storage capacity. When applied to the CDI dechlorination anode, Bi@BCN-900 exhibited a high desalination capacity of 145.96 mg g −1 and low energy consumption of 0.53 kWh kg −1 NaCl at an applied voltage of 1.2 V. Moreover, Bi@BCN-900 showed good stability over long-term cycling tests. This work expands the application of CAU-17 and offers new research insights for the design of bismuth-based materials for CDI dechlorination anodes.
研究领域:
材料科学
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环境工程
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电化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Feihu Zhang,Xinyan Xiao,Yu Xiao,Xia Cheng
Dye effluent is a serious threat to water ecosystem and human health, so it is urgent to develop high-efficient and stable semiconductor photocatalysts to solve the water pollution problem. A novel AgI/CAU-17 composite with 0D/2D hierarchical heterostructure was first constructed by growing AgI particles on CAU-17 nanorods via a mild deposition-precipitation procedure. The optimal 50% AgI/CAU-17 composite displayed the greatest photodegradation rate of 96.7% for RhB , 81.3% for TC and 50.3% for MO, under the simulated solar-light illumination for 70 min. The corresponding apparent rate constants were 0.04401, 0.02227 and 0.01104 min −1 , which were 23.79, 15.25 and 19.73-times higher than those of CAU-17, and 4.94, 1.79 and 6.29-times higher than those of AgI. The improved photodegradation performance could be owing to the following causes: 1) The 0D/2D hierarchical heterostructure endowed AgI/CAU-17 composite with tight interfacial contact, which could supply sufficient channels for the migration of photoinduced carriers; 2) The type II charge migrate pathway facilitated the segregation and migration of photoexcited carriers; 3) The AgI/CAU-17 heterostructures reinforced the light absorption capacity and augmented the specific surface area. In addition, various photocatalytic conditions were researched to imitate the degradation process of RhB in the real aqueous system. The radical capture experiments and EPR test attested that h + and •O 2 - played an important part in the photodegradation of RhB. This study illustrated the tremendous application potential of AgI/CAU-17 heterojunctions in water purification and provided a simple and reliable idea for the preparation of Bi-MOFs composite photocatalysts.
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
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Siyu Li,Weijun Shan,Ting Rao,Yanou Qi,Ying Xiong,Zhenning Lou,Haibiao Yu,Junshuo Cui,Xiaogeng Feng
Heavy metal ions (HMIs) are accumulative and toxic for the environment, causing one of the recognized social problems, while some metal ions have positive applications in the prognosis of diseases. Therefore, there is a necessity to achieve rapid, convenient, highly efficient determination of HMIs. In this work, a novel composite, CAU-17/CSG, consisting of CAU-17 and cellulose graphene (CSG) is synthesized via in situ growth method and serves as an effective electrochemical sensor. Taking advantages of the high catalytic activity of Bi in CAU-17 and the good synergy between CAU-17 and CSG , CAU-17/CSG exhibits excellent electrocatalytic activity to achieve individual and simultaneous detection of low concentrations of Zn 2+ , Cd 2+ and Pb 2+ in aqueous solutions. The limits of detection (LOD) for Zn 2+ , Cd 2+ and Pb 2+ are 0.029, 0.008 and 0.011 μM (S/N = 3), with linear ranges of 0.3–10, 0.01–2 and 0.03–2 μM, respectively. Meanwhile, the sensor exhibits good stability, reproducibility and anti-interference ability. As expected, CAU-17/CSG exhibits good accuracy in detecting metal ions in water and blood samples. Considering the simple preparation method, stable structure and excellent performance, the prepared composites will have great potential for environmental and biomedical applications.
研究领域:
环境科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zilong Meng,Shuo Song,Xinyu Zhang,Kaidi Zhang,Kelong Li,Weifeng Kong,Qianwei Liang,Jianrong Chen
Antibiotic residues like tetracycline hydrochloride (TCH) in water threaten ecosystems and human health, yet traditional photocatalysts struggle with low visible-light utilization and rapid photogenerated carriers recombination. This study presents a Bi/CAU-17 heterojunction designed as a photo-antenna/reaction center system, where metallic Bi acts as the light-harvesting antenna via the surface plasmon resonance (SPR) effect, and the CAU-17 metal-organic framework serves as the reaction center. The Bi/CAU-17 composite is synthesized via an in-situ reduction method, where Bi is generated on the surface of CAU-17, The research aims to elucidate the mechanisms by which the SPR effect influences the separation of photogenerated electron-hole pairs and improves the degradation efficiency of TCH. Under visible light, the optimized Bi/CAU-17 achieves 99.6 % TCH degradation within 60 min, with the pseudo-first-order rate constant ( k ) constant 9.45 times higher than pristine CAU-17. Mechanistic studies reveal that the SPR-enhanced heterojunction promotes the production of ⋅O₂⁻ as the dominant reactive species. Ecotoxicity assays (fish, daphnid, green algae and rat) confirm mineralization into non-toxic end products. This study also evaluates the ecotoxicity of degradation processes, confirming safe mineralization of intermediates into non-toxic end products. Notably, the practical applicability of the Bi/CAU-17 catalyst in real water sources maintain high degradation efficiency under sunlight irradiation. By integrating the photo-antenna concept with MOF-based reaction centers, this work demonstrates a scalable strategy for developing efficient plasmonic photocatalysts, providing valuable insights into the design of efficient photocatalyst for environmental remediation, particularly in the efficient degradation of antibiotic pollutants.
研究领域:
环境科学
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材料科学
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纳米技术
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光催化
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水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Yanni Li,Yujia Han,Hongxia Li,Xiaohui Niu,Deyi Zhang,Haiyan Fan,Kunjie Wang
A novel visible-light-driven type II p-n heterojunction CAU-17/MoS 2 photocatalytic antifouling biocide was prepared and indicated significant inhibition against the most pharmaceutically recognized harmful microorganisms: gram-positive Staphylococcus aureus ( S. aureus ), gram-negative Escherichia coli ( E. coli ) and the drug-resistant bacterium methicillin-resistant Staphylococcus aureus (MRSA). The antimicrobial mechanism is attributed to the production of reactive oxygen species (ROS) such as •OH, 1 O 2 due to the photocatalytic properties of CAU-17/MoS 2 heterojunction. The electron-hole complexation efficiency of the nanocomposites was analyzed using photoluminescence spectroscopy and characterized using electron microscope. It was found that the heterojunction structure of the nanocomposites provided multiple charge transfer channels to significantly improve the transporting and separating efficiency for the photo-induced electron-hole pairs, which consequently facilitated the production of ROS. Given the promising antimicrobial effects, further investigation on the broader application of CAU-17/MoS 2 biocides is needed to test the cytotoxicity, as well as the post-bacteriostatic wound healing effect upon animal models.
研究领域:
材料科学
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微生物学
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产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 6
·356
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IF 3.8
Jing Xu,Songlin Zhu,Huizhi Zhou,Minghao Hou,Kangle Wan,Xueqi Zhang,Wei Yan,Yingcong Wei,Yuanping Chen
Metal–organic frameworks (MOFs) have recently gained attention as a highly promising category of photocatalytic materials, showing great potential in the degradation of organic dyes such as Rhodamine B (RhB). Nonetheless, the mono-metal MOF materials in this application are often constrained by their limited light absorption capabilities and their propensity for recombination with carriers. The combination of different metal-based MOFs to form heterogeneous reactors could present a promising approach for the removal of dyes from water. In this work, a new CAU-17/MIL-100(Fe) Z-scheme heterojunction photocatalyst composed of two MOFs with the same ligands is reported to realize the efficient degradation of dyes in water. The combination of the two MOFs results in a significant enhancement of the surface open sites, optical responsivity range, and charge-separating efficiency through synergistic effects. In addition, the capture experiments conducted on the photocatalytic process have verified that ∙O2−and h+are the primary active species. Consequently, CAU-17/MIL-100(Fe) exhibited excellent photocatalytic activity and stability. The degradation rate of the optimal CAU-17/MIL-100(Fe) photocatalyst was 34.55 times that of CAU-17 and 3.60 times that of MIL-100(Fe). Our work provides a new strategy for exploring the visible-light degradation of RhB in bimetallic MOF composites.
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
危险品化学品经营许可证（带存储）