COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Nan Kong,Huiling Du,Zhuo Li,Tong Lu,Siyu Xia,Ziwei Tang,Shijie Song
Metal-organic frameworks (MOFs), featuring semiconductor-like behavior, are promising for the photocatalytic reduction of CO 2 . While their practical application is hindered by the disadvantages of low charge migration efficiency and fast electron-hole pair complexation. In this paper, a simple solvothermal method was used to load NH 2 -UiO-66 onto the surface of MIL-101(Cr) to form a nano type II heterojunction double MOFs composite of NH 2 -UiO-66 @MIL-101. The results show that the heterostructure of NH 2 -UiO-66 @MIL-101 promotes the separation of photogenerated electron-hole pairs and accelerates the interfacial photogenerated electron transfer under light, and the NH 2 -UiO-66 @MIL-101 type II heterojunction exhibits higher activity for photocatalytic reduction of CO 2 compared with pure MIL-101(Cr) and NH 2 -UiO-66. In addition, the possible photocatalytic mechanism was further elucidated to demonstrate the increased photocatalytic activity of NH 2 -UiO-66 @MIL-101. This study provides effective insights for designing efficient MOFs photocatalysts for CO 2 reduction to enhance the photocatalytic activity for environmental protection and governance.
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
TALANTA
·
2023
·
IF 6.1
Rui Wang,Chunlan Liu,Yong Wei,Ze Ran,Tianci Jiang,Chunbiao Liu,Chen Shi,Zhuo Ren,Xingkai Wang,Zhihai Liu,Yu Zhang
The concentration of tumor markers is low, which needs a highly sensitive, stable and fast detection method. In this paper, we proposed and demonstrated a U-shape fiber SPR biosensor sensitized by MOFs materials. The surface of the U-shape SPR sensor was modified with MOFs materials to enhance the sensitivity, and the nucleic acid aptamer was immobilized on the sensor surface because of the biocompatibility of MOFs materials. By the high specificity of the nucleic acid aptamer, the MUC1 protein was recognized and detected. The testing results indicate that the sensor has a logarithmic linear response in the MUC1 protein concentration detection range of 1 pg/ml-100 μg/ml, its sensitivity and detection limit are 5.33 nm/log(μg/ml) and 0.16 pg/ml respectively. After being sensitized by MOFs, the detection sensitivity of the sensor can be increased by 1.62 times，the LOD can be decreased by 0.75 times. The sensor has high sensitivity and specificity, which has broad application prospects in clinical detection of tumor markers.
研究领域:
生物医学工程
·
肿瘤标志物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
STAR Protocols
·
2022
·
IF 0
Ziman Chen,Yahui Zhang,Qingmei Song,Liang Ma,Yongqin Lv
Summary Mixed-matrix membranes (MMMs) comprising polymer matrices and metal-organic frameworks (MOFs) provide efficient and economic CO 2 separation. One major challenge is to construct continuous and defect-free MMMs due to poor MOF/polymer compatibility. Here, this protocol describes the step-by-step details for synthesis of desired linkers that allow the fabrication of new polymerizable MOFs containing vinyl groups (BUCT MOFs) and the preparation procedures of defect-free MMMs with enhanced MOF/polymer interfacial adhesion and boosted gas separation performances. For complete details on the use and execution of this profile, please refer to Chen et al. (2021) .
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
PubMed
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Peng Yong,Sheng Wang,Xu Zhang,Haibo Pan,Shuifa Shen
Shape controlled preparation and doping are important means to improve the gas sensitivity of metal oxide semiconductor materials. In this work, pure and Co-doped In 2 O 3 porous hollow hexagonal cylinders were successfully prepared using metal–organic frameworks (MOFs) MIL-68(In) as self-sacrificial template. The size of the MIL-68(In) hexagonal cylinder is uniform, and the In 2 O 3 obtained after pyrolysis better inherits the shape of the MIL-68(In), but becomes hollow, and the cylinder surfaces are porous. The product has a large specific surface area (46.52 m 2 /g), and the doping of Co significantly increases the oxygen vacancy of the material. The Co-doped sample obtained by pyrolysis at 500℃ has excellent gas sensing performances to ethanol gas, its sensitivity to 100 ppm ethanol gas at 210 ℃ is 14.6, response/recovery time is 21 s and 107 s, and the sensing selectivity to ethanol is also good.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Zhengjie Li,Chen Ma,Miao Qi,Yunlong Li,Yanchao Qu,Ying Zhang,Lilong Zhou,Jimmy Yun
Nano CeO 2 (CeMOF) maintaining the primary micromorphology and pore structure of MOFs was successfully synthesized by controlled pyrolysis of UiO-66(Ce) in air. CeMOFs showed excellent activity for catalytic combustion of VOCs, including toluene, benzene and xylene. The results showed that the T 10% , T 50% and T 90% of toluene over CeMOF were 185, 198 and 206 ℃ (GHSV = 22500 h −1 , toluene concentration = 1000 ppm), respectively, which are the lowest among ever reported ceria catalysts. According to various characterization results, the high catalytic activity of CeMOF can be ascribed to its neat pore structure and high percentage of Ce with low chemical valence. The latter leads to massive surface oxygen species and oxygen vacancies which provides abundant oxidative sites for VOCs. The low-temperature reducibility and multiple weakly acidic sites also enhanced the catalytic activity. In addition, CeMOF shows good ability to resist H 2 O and thermal stability. The in-situ DRIFTs study of CeMOF shows toluene is degraded by continuous stages through quick conversion of toluene to benzaldehyde and adsorbed benzoate, and forms CO 2 and H 2 O at last.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Mengyang Xu,Xiaoxue Zhao,Haopeng Jiang,Songtao Chen,Pengwei Huo
Converting carbon dioxide into valuable chemicals is seen as a promising strategy for slowing global warming while enriching energy supplies. Photocatalysts derived from Metal-Organic Frameworks (MOFs) can not only overcome the problem of poor stability of MOFs, but also inherit the advantages of MOFs to some extent. Herein, carbon doped In 2 O 3 (C-In 2 O 3 ) hollow tubular is synthesized by calcination of MIL-68(In) as sacrificial template. Then C-In 2 O 3 and g-C 3 N 4 are hydrothermal to obtain C-In 2 O 3 /g-C 3 N 4 heterojunction . The unique hollow tubular structure, carbon doping and type-II heterojunction of C-In 2 O 3 /g-C 3 N 4 expand the light absorption capacity and promote the separation of photogenerated electron-hole pairs, thus significantly improve the activity of photocatalytic reduction of CO 2 . Among them, C-In 2 O 3 /g-C 3 N 4 -5 shows the highest CO 2 reduction activity towards CO (153.42 μmol/g/h) and CH 4 (110.31 μmol/g/h).
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Miaomiao Chen,Hailong Xu,Huili Zhao,Wei Bai,Min Ji
Selective hydrogenation of C C double bond in α, β-unsaturated carbonyl compounds is of great significance in the production of fine chemicals, and the design and preparation of hydrogenation catalysts with high selectivity is the key to realize the industrialization of this reaction. Controlling and adjusting the steric hindrance between substrate molecules and active center of catalysts is an effective strategy to achieve high selectivity. In this work, the spatially hindered “Frustrated Lewis pairs” (FLPs) was used as the active component and metal-organic frameworks (MOFs) materials with a certain window size were used as the catalyst support. We designed and synthesized a heterogeneous hydrogenation catalyst B(C 6 F 5 ) 3 /DO-MIL-101 by immobilizing FLP onto metal-organic frameworks (MIL-101). Characterizations and catalytic performance tests revealed that the catalytically active species B(C 6 F 5 ) 3 /DO was confined in MIL-101 nanocavities via Cr–O coordination bond. The resulting B(C 6 F 5 ) 3 /DO-MIL-101 catalyst not only realized the recycling of FLP, but also showed excellent catalytic activity and high selectivity in the selective hydrogenation of C C double bond in α, β-unsaturated carbonyl ketones. It should be noted that the steric hindrance between FLP and substrate molecules, as well as the shape selectivity of MOFs nanocages, are the principal factors for the high selectivity of the catalyst.
研究领域:
化学工程
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 3
·2599-2607
·
IF 8.897
Yuan Zhanhong,Meng Dingding,Wu Yingzhu,Tang Guangqing,Liang Ping,Xin John H.,Ye Dongdong
Because of a weak interface-bonding force between metal-organic frameworks (MOFs) and substrates and the loss of customization in structural designs owing to the lack of the regulation of ion sites, MOFs tend to escape from the constructed composite template. In this study, the as-prepared 2,2,6,6-tetramethylpiperidyl-1-oxyl (TEMPO)-oxidized algae cellulose nanofibers (TACFs) were used to chelate metal ions at controllable sites and subsequently firmly entangle the assembled MOF crystals. The distribution of ions and synthesized MOFs inside the gel was monitored using Raman imaging technology, which provided an intuitive approach for visually observing the ions and MOF distribution. Using this technology, the synthesized customizable TACFs@ZIF-67 aerogels exhibited a high specific surface area (734.7 m 2 /g), low density (6.18 mg/cm 3 ), controlled particle distribution, good underwater structural stability, and excellent adsorption of dyes. This study provides a way for solving the dispersion problem of MOFs in nanofibrous aerogels using Raman imaging technology-assisted microcosmic fixed-point design.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 25
·5817-5829
·
IF 7
Shaohu Huo,Qianhui Xie,Min Zhang,Zitong Jiang,Ling Fu,Wenhong Li,Chenrong Bian,Kaile Wu,Yulin Zhu,Xuan Nie,Shenggang Ding
Antibiotic tolerance is implicated in difficult-to-treat infections and the development and spread of antibiotic resistance. The high storage capacities and excellent biocompatibilities of UiO-66-based metal–organic frameworks (MOFs) have made them emerging candidates as drug-delivery vectors. In view of hydrogen sulfide (H2S) having been associated with the development of intrinsic resistance to antibacterial agents, we designed a strategy to potentiate existing antibiotics by eliminating bacterial endogenous H2S. We efficiently fabricated an antibiotic enhancer Gm@UiO-66-MA to remove bacterial H2S and sensitize an antibacterial by modifying UiO-66-NH2 with maleic anhydride (MA) and then loading it with gentamicin (Gm). UiO-66-MA achieved the removal of bacterial endogenous H2S and the destruction of bacterial biofilm by selectively undergoing Michael addition with H2S. Moreover, Gm@UiO-66-MA further enhanced the susceptibility of tolerant E. coli to Gm after reducing bacterial intracellular H2S levels. An in vivo skin wound healing experiment confirmed that Gm@UiO-66-MA could greatly reduce the risk of bacterial reinfection and accelerate wound healing. Overall, Gm@UiO-66-MA offers a promising antibiotic sensitizer for minimizing bacterial resistance and a therapeutic strategy for tolerant bacteria-related refractory infections.
研究领域:
材料科学
·
微生物学
·
药物递送
·
感染与免疫
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Can Sun,Shouxin Zhu,Jingyi Qu,Zhexiao Zhu,Yutong Chen,Xuewei Tu,Wenya Cai,Zhiqin Yu,Yibin Liu,Shijie Zhang,Hui Zheng
Photocatalytic nitrogen fixation is seen to be a potential technology for nitrogen reduction due to its eco-friendliness, low energy consumption, and environmental protection. In this study, photocatalysts with abundant oxygen vacancies (Zr-naphthalene dicarboxylic acid (Zr-NDC) and Zr-phthalic acid (Zr-BDC)) were designed using 1,4-naphthalene dicarboxylic acid (H 2 NDC) and 1,4-phthalic acid (H 2 BDC) as ligands. Since the structure of H 2 NDC includes one extra benzene ring than H 2 BDC, the charge density differential of the organic ligand is probably altered. The hypothesis is proved by density function theory (DFT) calculation. The abundant oxygen vacancies of the catalyst offer numerous active sites for nitrogen fixation. Concurrently, the process of ligand–metal charge transfer facilitates photo-electron transfer, creating an active center for nitrogen reduction. Additionally, the functionalization of ligand amplifies another pathway for charge transfer, broadening the light absorption range of Metal-organic framework (MOF) and increasing its capacity for nitrogen reduction. In contrast to H 2 BDC, the benzene ring added in H 2 NDC structure acts as an electron energy storage tank with a stronger electron density difference favorable for photogenerated electron-hole separation resulting in higher photocatalytic activity in Zr-NDC. The experimental results show that the nitrogen fixation efficiency of Zr-NDC is 163.7 µmol g −1 h −1 , which is significantly better than that of Zr-BDC (29.3 µmol g −1 h −1 ). This work utilizes cost-effective and non-toxic ingredients to design highly efficient photocatalysts, thereby significantly contributing to the practical implementation of green chemistry principles.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Liming Dai,Chenchen Fang,Fanglei Yao,Xiaoyuan Zhang,Xuefeng Xu,Shangling Han,Jingyao Deng,Junwu Zhu,Jingwen Sun
In-situ generated hydroxides and oxyhydroxides have been gradually recognized as the real active sites of metal organic frameworks (MOFs) towards the oxygen evolution reaction (OER). Nevertheless, the fine phase evolution process is still less of concern and elusive. Herein, we successfully construct serious of Ni-MOFs with differing thickness ranging from 1 nm to 270 nm through a competitive coordination strategy. Utilizing the operando resonance spectroscopy, an accurate phase inversion behavior of the Ni-MOFs has been witnessed during the OER, and demonstrated as a thickness-dependent process. Ultrathin architecture is identified as a positive factor to promote the exchange between MOFs ligands and applied electrolyte during the electrochemical test. Hence, after removing most of the internal ligands, 2D MOFs favor to be transformed as β-NiOOH, which is more active than the generated γ-NiOOH in bulky system. The density function theory (DFT) calculation alongside with the in-situ electrochemistry tests further affirm the β/γ-NiOOH transformation behavior. This work offers a new understanding of the electrocatalytic mechanism from the view point of phase evolution in 2D MOFs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiuhong Zhao,Wenjing Zhu,Yuxuan Mao,Guixia Ling,Peng Zhang
The increased uric acid (UA) level is closely related to many diseases. However, the detection of UA remains great challenges due to the pain of blood testing and the complexity of common methods. Therefore, the detection of UA is of great significance for public health. In this paper, a new method for UA detection is proposed. The swellable hydrogel microneedles (hydrogel MNs) can be used for minimally invasive extraction of skin interstitial fluid (ISF). The colorimetric detection of trace UA in ISF can be successfully achieved by virtue of DNAzyme@MOFs with enhanced peroxidase activity. This study provides a powerful tool for minimally invasive, painless, rapid and convenient detection of UA in clinical applications. This study not only avoids the use of expensive and unstable natural enzymes but also expands the applications of DNAzyme@MOFs in biomedical detection.
研究领域:
医学检测
·
生物化学
·
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）