JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Lijun Guo,Feifei Li,Jianxin Liu,Rui Li,Zhuobin Yu,Qing Xi,Lulu Zhang,Yaru Li,Caimei Fan
Morphology regulation is a simple way to improve photocatalytic activity. In this work, a MIL-101(Fe) photocatalyst with cracked spindle morphology has been successfully prepared by EG pre-coordination solvothermal method . The cracking degree of MIL-101(Fe) can be regulated by adjusting pre-coordination time. The MIL-101(Fe) with the optimal uniform crack displays a best NH 3 evolution rate of 592 μmol h −1 g −1 under the visible light irradiation . Cracked MIL-101(Fe) is similar to a semi-exposed model, which can increase the number of reactive sites, improve refraction and reflection of light, and ultimately enhance the photocatalytic nitrogen fixation activity. This work developed a convenient strategy to improve the photocatalytic activity of nitrogen reduction by controlling morphology.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Min Wang,Shu Zhang,Qi Li,Yuanpeng Li,Enzhe Duan,Caimei Wen,Shujun Yu,Xiangxue Wang
Extracting uranium from seawater not only reduces radioactive contamination in seawater but also provides a source of uranium energy. However, due to the low concentration of uranium in seawater and the high salinity of seawater, extraction of uranium from seawater is challenging. In this work, we demonstrated a simple strategy to synthesize Fe-doped MXene (Fe@Ti 3 C 2 T x ) via a hydrothermal method and applied for uranium enrichment in seawater. The Fe@Ti 3 C 2 T x exhibited excellent adsorption performance in high salinity environments. The removal capacity of Fe@Ti 3 C 2 T x was determined to be 526.6 mg/g for UO 2 (CO 3 ) 2 2− at 328 K with quick reaction equilibrium (∼ 30 min). Kinetic and thermodynamic analyses of UO 2 (CO 3 ) 2 2− elimination process on Fe@Ti 3 C 2 T x surface revealed it to be a spontaneous and endothermic single-phase elimination process. FT-IR and XPS analyses further indicated that the removal mechanism of UO 2 (CO 3 ) 2 2− by Fe@Ti 3 C 2 T x was surface complexation. Our study suggests that Fe@Ti 3 C 2 T x can provide a feasible solution for uranium enrichment in seawater.
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
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Jiangbo Shi,Guiqiu Chen,Guangming Zeng,Anwei Chen,Kai He,Zhenzhen Huang,Liang Hu,Jingwen Zeng,Jing Wu,Weiwei Liu
In this study, graphene wrapped Fe-doped TiO 2 (G-TiO 2 -Fe) spheres were prepared through a simple hydrothermal process. The structural, optical and photocatalytic properties of synthesized composite were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction ( XRD), Raman Microprobe (Raman), X-ray photoelectron spectroscopy (XPS) and UV–Vis diffuse reflectance spectrophotometer (DRS). The G-TiO 2 -Fe composite showed a significant red-shift in light response edge as compared with TiO 2 . Meanwhile, the band gap exhibited an obvious decline from 3.24 to 2.99 eV. The photocatalytic capacity of G-TiO 2 -Fe was further evaluated by methylene blue (MB) degradation experiments, and the results indicated that the optimized G-TiO 2 -Fe exhibited a remarkable increase in photocatalytic activity. The superior photocatalytic performance of the novel material could be ascribed to the synthetic effects of doped Fe and wrapped graphene shells. The unique geometrical configuration and constructive component which modified the TiO 2 electronic structure will largely improve the electron transporting efficiency and restrain the electron-hole recombination.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 44
·e202403927
·
IF 1.9
Hui Han,He Cui,Jiabo Wang,Kai Ge,Yongfang Yang
Graphical In this paper, 2D MOF-Co, 2D MOF-Co/Cu, and 2D MOF-Co/Cu/Fe are designed and prepared using 1,4-benzendicarboxylic acid (1,4-BDC) as organic ligands. Their charge transfer, separation efficiency, and effects on photocatalytic CO 2 reduction are studied. The results show that 2D multimetallic MOF-Co/Cu/Fe has better photocatalytic CO 2 reduction activity, so it has higher research value and development prospect in the field of photocatalytic CO 2 reduction. In this study, 2D multimetallic MOFs combined with the advantages of 2D nanosheets, with the synergetic effect of multimetallic nodes, exhibited good photocatalytic activity for reduction of CO 2 . Herein, a 2D MOF-Co/Cu/Fe were successfully prepared via one-pot stirring of the solutions of multimetal salts and organic ligands at room temperature. Introduction of the second and third metal (Cu and Fe) into MOF-Co does not change the 2D morphology of MOFs, although it improved the photocatalytic CO 2 reduction performance by broadening the light absorption range of 2D MOF-Co, accelerating the separation efficiency and transfer rate of photogenerated carriers. Upon irradiation with full-spectrum light, the average CO yield of 2D MOF-Co/Cu/Fe achieved 17.06 µmol·g −1 ·h −1 , being about 1.8 and 1.2 times that of 2D MOF-Co and 2D MOF-Co/Cu. This work provides an insight into 2D multimetallic MOFs-based photocatalysts in catalytic CO 2 reduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Peng Wang,Chenyu Gao,Qianpeng Dong,Lianlian Wang,Dianming Chu,Yan He,Wenjuan Bai
s The application of carbon nanotubes in materials science is rapidly expanding, leading to an increasingly urgent demand for large-scale synthesis. Central to the growth of carbon nanotubes is the development of effective catalysts; thus, the large-scale production of these catalysts becomes crucial for successful carbon nanotube synthesis. Extensive research has been conducted on the mechanisms and regulation of interfacial interactions between metals and supports during catalyst synthesis. This paper is based on the interface interactions between common metal catalysts such as Fe, Co, Ni, and Al 2 O 3 , and Fe-Co, Fe-Ni, and Fe-Co-Ni metal catalysts were prepared by a one-step method. The catalysts were synthesized through a "one-step process," and the formation mechanisms of bimetallic and trimetallic catalysts, as well as the influence of interfacial interactions on catalyst formation and catalytic activity, were thoroughly investigated. The results indicate that with the involvement of Fe, Co and Ni on the surface of Al 2 O 3 maintain a small size morphology due to interfacial interaction. Meanwhile, the nanoparticles form a doped structure with Al 2 O 3 , effectively avoiding the deactivation of nanoparticles caused by agglomeration. In addition, the three catalysts for growing CNTs were analyzed in order to investigate the effects of different concentrations of metal ratios and time of carbon source on the catalytic activity, which provides new ideas for improving the catalyst design system.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
·
2022
·
IF 1.404
Dongdong Zhang,Pan Zhang,Jiahuan Chen,Zhen He,Mingfang Wu
This study develops the Ni–Fe–P–TiO 2 nanocomposite coatings via an electroless deposition process. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the coating structures. Hardness and wear tests were conducted to measure the coating’s mechanical performance, and polarization curves were recorded to evaluate the corrosion behavior. The results show that the TiO 2 nanoparticles are incorporated into the coatings. The proper addition of TiO 2 refines the coating surface morphology without changing the coating phase constituents. The best mechanical and corrosion performance is obtained for the 0.5-g/L modified Ni–Fe–P–TiO 2 sample, owing to its compact surface feature and well-dispersed TiO 2 nanoparticles.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Chengzhuo Yu,Jin Xu,Li Xiong,Yarui Wang,Silong Wang,Fanglan Geng,Zesen Shang,Huasheng Wu,Lixia Zhao,Yawei Wang
Luminol-based chemiluminescence (CL) systems, as a powerful tool for bioanalysis, are limited owing to their weak CL intensity and self-decomposition of the classic oxidant H2O2. Herein, we introduced a new luminol CL enhancer, the natural light-driven photocatalyst MIL-100(Fe)/TiO2, for the selective determination of dopamine (DA). By employing MIL-100(Fe)/TiO2 for the first time as an efficient enhancer, the MIL-100(Fe)/TiO2-luminol CL intensity was 100 times higher than that of the classical H2O2-luminol system. The CL spectrum, UV–vis absorption spectroscopy, radical scavenger experiments, and electron spin resonance spectroscopy were utilized to investigate the possible CL mechanism of the MIL-100(Fe)/TiO2-luminol system. All of the results indicated that MIL-100(Fe)/TiO2 can generate reactive oxygen species under mild natural light, which could react rapidly with the luminol anion radical and result in direct CL emission. The sensitive plate for DA was developed based on its inhibiting effect on CL intensity, and the linear range between CL intensity and DA concentration was 100 nM–1000 μM with a detection limit of 16.7 μM (S/N = 3). This study successfully achieved a stable reactant that can directly trigger the CL of luminol without the need for additional oxidizing agents under mild natural light and offers new possibilities for photoinduced amplification technology.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 19
·7973-7977
·
IF 1.938
Yingfeng Qin,Liangliang Zhang,Gaojie Ye,Shulin Zhao
A homogeneous label-free colorimetric sensing strategy for bleomycin (BLM) assay was developed on the basis of BLM enhanced Fe(II)–H2O2–ABTS reaction. Fe(II) exhibits a catalytic effect on H2O2-mediated oxidation of ABTS by Fenton chemistry. BLM·Fe(II) complex possessed a significantly higher catalytic ability than Fe(II) probably because of the further formation of more active “activated oxo-iron-bleomycin complex”. The present method was convenient without any complicated chemical synthesis, modification, or tedious experimental procedures. Analysis results can be seen with the naked eye and monitored by UV-vis spectra. The peak absorbance exhibits a linear relationship with BLM concentrations from 25 nM to 1 μM, and a detection limit of 16 nM can be achieved. The designed colorimetric strategy may provide a promising alternative for BLM detection in clinical samples.
研究领域:
分析化学
·
生物医学
·
临床检验
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Yixuan Liu,Jiamin Wei,Qi Zong,Chaoyue Chen,Tinghai Yang,Weiqiao Liu
Constructing cost-efficient and robust Fe-MIL-based photocatalysts for efficiently photodegrading antibiotics is highly appealing, however, their intrinsic defects, particularly unsatisfied visible light harvesting efficiency and rapid recombination of charge carriers, provide significant challenges. Herein, oxygen-vacancy-rich Bi 2 WO 6 -OVs/NH 2 -MIL-88B (Fe) composites were successfully constructed via a two-step approach consisting of a hydrothermal reaction followed by NaBH 4 treatment. The chemical compositions, microstructure, morphology, as well as optical properties of the as-prepared samples were thoroughly established. The optimized Bi 2 WO 6 -OV(40)/NH 2 -MIL-88B(Fe) photocatalyst exhibited the maximum photocatalytic efficiency (95.3 %) for the photodegradation of Norfloxacin (NOR), which was considerably greater than that of the heterostructure (56.9 %). The enhancement of photocatalytic performance can be attributed to the collaborative effect between oxygen vacancies and hybrid heterojunctions, which jointly enhances photoexcited electron generation and accelerates charge transfer. Furthermore, from the perspective of practical applications, the effects of pH, NOR concentration, and photocatalyst reuse were carefully investigated. The radical trapping experiments and ESR results verified that superoxide radicals (•O 2 − ), holes (h + ), and hydroxyl radicals (•OH) were the main active species in the NOR degradation process, and the possible photocatalytic mechanism was speculated accordingly. This research provides a promising approach to fabricating Fe-MOF-based heterojunctions with surface oxygen vacancy defect modification for the photodegradation of antibiotics.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 65
·40952-40956
·
IF 3.108
Chunlin Tan,Xiuya Su,Chao Zhou,Baoju Wang,Qiuqiang Zhan,Sailing He
Red-emitting carbon dots (C-dots) were synthesized from p-phenylenediamine (p-PD) aqueous solution with nitric acid (HNO3) assistance by hydrothermal reaction at 200 °C for 2 h. p-PD aqueous solution can be transferred to C-dots (or poly(p-PD)) with (or without) the addition of acid. Different acid systems, such as HNO3, H3PO4 and HF, can directly synthesize red-emitting C-dots, and the fluorescence can be enhanced by increasing the strength of acids. N-CDs, 3.46 nm-average-sized C-dots, prepared in dilute HNO3, have a quantum yield of 15.8% with unique, excitation-wavelength independent emission in the red region (600 and 680 nm) and a broad visible excitation band. Carboxyl, ester and hydroxyl groups on the C-dots surface directly lead to red emission. N-CDs have a certain selective specificity for Fe3+ detection and the linear range is 10–300 nmol L−1 with a limit of determination of 1.9 nmol L−1.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jun Wu,Wenzhong Zhang,Chunping Li,Erdan Hu
The effects of Fe(III) and Cu(II) on the sorption of atrazine (AT) and prometryn (PY) on clay minerals were investigated both preloaded and in solution. For smectite , Fe(III) preloading greatly enhanced AT and PY sorption at pH 4.0 and 6.0 but diminished AT sorption at pH 8.0. Cu(II) preloading promoted AT and PY sorption under alkaline conditions but suppressed AT sorption at pH 4.0. The adverse effects were not obvious for PY. While for illite and kaolinite , Fe(III) and Cu(II) had little or promotion effects due to the lower contents of them in these two minerals. In the co-sorption studies, for smectite, AT sorption remained at pH 4.0 and increased at pH 6.0 and 8.0, while PY sorption was inhabited over the pH range of 4.0–8.0 in the presence of Fe(III). AT and PY sorption were not affected by Cu(II) except for PY at pH 8.0, in which case, the sorption was promoted. For illite and kaolinite , Fe(III) and Cu(II) generally enhanced AT and PY sorption.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Miaomiao Chen,Meng Zhou,Caihong Mao,Chunchao Wu,Shujie Pang,Xudong Yang
Fluorescent hydrogel were developed for Fe(II) detection to overcome the shortcomings of simple carbon dots solutions (CDs), which are difficult to store and use. CDs were prepared using the hydrothermal synthesis with o -phenylenediamine and dopamine as the carbon sources. Fluorescent hydrogel (CACDs) were obtained by doping CDs in and impregnating them with carboxymethyl cellulose hydrogel (CA) prepared using crosslinked carboxymethyl cellulose (CMC), which was grafted using acrylamide as the substrate. Using CDs and CA as a fluorescent group and a backbone, respectively, enhanced the fluorescence performance and facilitated Fe(II) detection. The surface groups, elemental composition and optical properties of the prepared CDs and CACDs were systematically studied using FTIR, XRD, UV–Vis and fluorescence spectrometer. The effects of pH, temperature, NaCl salt solution and UV irradiation on the stability of CDs in the hydrogel were discussed. CACDs exhibited strong, bright yellow fluorescence with a fluorescence intensity 4.35 times higher than that of CDs. CACDs can be used as fluorescent probes to realise real-time detection of Fe(II) at a low detection limit (0.22 μM), allowing them to be employed for Fe(II) detection in real water samples. CACDs had stable adsorption properties for Fe(II). The adsorption process of metal ions conformed to pseudo-second order kinetics and Langmuir model, respectively. Therefore, CACDs are expected to be bifunctional materials for effective detection and removal of Fe(II).
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 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）