Catalysts
·
2022
·Vol. 12
·期 10
·1140
·
IF 4.501
Wei Zhang,Caiping Ma,Xingwu Liu,Yong Yang,Yongwang Li,Xiaodong Wen
Elucidation of the intrinsic catalytic principle of iron carbides remains a substantial challenge in iron-catalyzed Fischer-Tropsch synthesis (FTS), due to possible interference from other Fe-containing species. Here, we propose a facile approach to synthesize single-phase θ-Fe3C via the pyrolysis of a molecularly defined Fe-C complex (Fe4[Fe(CN)6]3), thus affording close examination of its catalytic behavior during FTS. The crystal structure of prepared θ-Fe3C is unambiguously verified by combined XRD and MES measurement, demonstrating its single-phase nature. Strikingly, single-phase θ-Fe3C exhibited excellent selectivity to light olefins (77.8%) in the C2-C4hydrocarbons with less than 10% CO2formation in typical FTS conditions. This strategy further succeeds with promotion of Mn, evident for its wide-ranging compatibility for the promising industrial development of catalysts. This work offers a facile approach for oriented preparation of single-phase θ-Fe3C and provides an in-depth understanding of its intrinsic catalytic performance in FTS.Keywords:θ-Fe3C;single phase;Fischer-Tropsch synthesis;Prussian blue analogue
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yuanyuan Zhang,Ruyi Xiao,Shuangfei Wang,Hongxiang Zhu,Hainong Song,Guoning Chen,Hongfei Lin,Jian Zhang,Jianhua Xiong
To develop an efficient heterogeneous Fenton-like catalyst is of great importance for degrading organic pollutants. CeO 2 was selected as the catalyst carrier. Prussian blue (PB) was chose as the iron resource for its sensitivity to H 2 O 2 and low toxicity. PB modified CeO 2 composite was successfully fabricated and used for Fenton-like oxidation of norfloxacin (NOR) in this study. The characteristics of the catalysts demonstrated that the doping of PB distorted the lattice locally and increased the surface area of CeO 2 obviously. The XPS analysis also indicated that chemically supported catalysts PB/CeO 2 with more Ce 3+ was beneficial to Fenton-like catalytic reaction. The degradation tests showed that the PB/CeO 2 significantly enhanced the removal of NOR which indicated a synergistic effect between PB and CeO 2 . The reason should be mainly attributed to the synergetic catalysis of H 2 O 2 by Fe 3+ /Fe 2+ and Ce 3+ /Ce 4+ redox couples. At the same time, PB/CeO 2 composite showed well reusability and wide pH value range of 2–9 with fairly low concentration of iron ions. The reaction mechanisms were identified to be OH oxidation and improvement of oxygen vacancies (OVs).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jiangyan Lu,Zhu Xiong,Mahmud Sakil,Yuhang Cheng,Kaige Dong,Dongdong Qin,Wei Zhang,Li Yu,Gaosheng Zhang,Shuaifei Zhao
Developing highly efficient adsorbents for the removal of trace thallium(I) (Tl + ) is crucial for addressing environmental challenges. In this study, we successfully synthesized cubic Prussian blue (PB) loading on filter papers using an intermediate layer (dopamine/polyethyleneimine) via in-situ methods. The as-prepared PB-modified FP demonstrated outstanding anti-interference properties and light-enhanced adsorption performance for Tl + (0.5 mg/L) under ultraviolet (UV) irradiation, exhibiting twice the effectiveness compared to dark conditions, even in acidic and coexisting ionic environments. This indicated its suitability for treating complex Tl + -contaminated water. Notably, the removal efficiency for trace Tl + was almost 100%, with a maximum experimental adsorption capacity of 86.2 mg/g after 1-h photo-promoted adsorption under 365 nm UV. Characterization results supported a proposed photo-driven redox mechanism that elucidated the interaction between Tl + and PB-modified FP. Specifically, the accelerated Fe(III) to Fe(II) redox reaction facilitated Tl + accommodation on the surface and/or lattice of PB, enhancing Tl + adsorption by compensating for missed positive charges. This study provides valuable insights into utilizing PB-based materials to enhance the photo-enhanced Tl + adsorption capacity in a cost-effective, easy-to-synthesize, and environmentally friendly manner.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Yang Man,Li Zhanguo,Wang Yi,Lin Xiaoyan
In this study, a hydrogel-based strippable coating was expeditiously synthesised by employing hydrogen bonding between eco-compatible guar gum (GG), borax, and glycerol (Gly), thereby endowing the coating with excellent swelling capabilities and a high water retention capacity. This approach was specifically designed to navigate the intricate rheological management associated with strippable coating decontaminants. Through the incorporation of Prussian blue (PB), a material highly effective in adsorbing cesium (Cs), the solubility and diffusion of radionuclides within the hydrogel were significantly enhanced, thereby augmenting the decontamination efficacy of the hydrogel. The PB–GG–Gly composite demonstrated remarkable decontamination efficiencies, removing Cs from surfaces of glass, stainless steel, rubber, lacquer, and cement with percentages of 99.66%, 99.37%, 99.71%, 99.67%, and 83.83%, respectively.
研究领域:
材料科学
·
环境科学
·
放射性污染治理
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Zhaoze Lu,Jian Yu,Kaihua Wang,Wei Cheng,Likai Hou
Micro-droplets have significant applications in microbiologies, pharmaceuticals, cosmetics, and synthetic materials. Here, we present for the first time a near-infrared (NIR) light-triggered double-emulsion drop (DED) bursting method for generating a large number of micro-droplets in several micron. Under the irradiation of NIR light, the inner water phase of the DED containing a trace amount of Prussian blue (PB) rapidly heats up and evaporates rapidly to generate microbubbles due to the photothermal property of PB. By controlling the light intensity, the DED can inflate itself by coalescing these constant microbubbles to burst immediately and tear the middle oil phase to form a large number of micro-droplets. The performance of micro-droplets generated by NIR light-triggered DED bursting is investigated at different oil shell thickness (HO), oil phase viscosity (ηO) and oil type. HO and ηO are both key factors affecting the generation of micro-droplets. DED with lower HO and ηO can generate lower polydispersity and large quantity of micro-droplets by NIR-triggered DEDs bursting. The proportion of micro-droplets below 10 μm can reach up to 95%. Furthermore, camellia oil, as middle oil phase of DEDs, also can be used to generate lower polydispersity and large quantity of micro-droplets in several micron. The presented bursting method has a great potential to generate micro-droplets for micro/nano and biotechnology applications.
研究领域:
微生物学
·
药学
·
合成材料科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·
IF 2.2
Lipeng Wang,Mengjiao Zheng,Longjie Lai,Rui Wang,Tongton Qian,Li Zhang,Waqar Younas,Guobing Mao,Qi Liu
Graphical Au nanoparticles and PB-modified ZnIn 2 S 4 composite photoanode are successfully prepared on FTO substrates. The ZnIn 2 S 4 /Au/PB photoanode achieves a photocurrent density of 0.42 mA/cm 2 at 1.23 V RHE under light illumination alongside a high incident photon-to-electron conversion efficiency (IPCE) value of 24.6 %. ZnIn 2 S 4 has been regarded as a promising photoanode material for photoelectrochemical (PEC) water splitting. However, its severe charge recombination and low carrier transport efficiency limit practical applications in PEC water splitting. A novel ZnIn 2 S 4 /Au/PB photoanode was prepared by using the in-situ photodeposition of Au nanoparticles and electrodeposition of Prussian blue (PB) nanoparticles onto ZnIn 2 S 4 nanosheets. The photocurrent density of the prepared ternary photoanode reached 0.42 mA/cm 2 at 1.23 V RHE , which is 6 times higher than pure ZnIn 2 S 4 . The introduction of Au nanoparticles remarkably improved the efficiency of carrier transport and separation. Additionally, the application of PB onto ZnIn 2 S 4 resulted in an extended spectrum of light absorption. The incident photon-to-current efficiency (IPCE) value recorded was 24.6 % at 350 nm. This improvement can be attributed to the formation of a Z-type heterojunction.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yuanhao Shen,Juan Zou,Haihui Lan,Yiran Ding,Zijia Liang,Zhongzhuo Yang,Ziyue Zeng,Juncai Long,Yuanxin Zhao,Lei Fu,Mengqi Zeng
Aqueous ammonium-ion batteries (AIBs) are considered a promising alternative for large-scale energy storage due to their cost-effectiveness and high safety. Prussian blue analogues (PBAs) are widely regarded as potential cathode materials for AIBs because of their high working potential and stable 3D framework. However, the low capacity of PBAs (≈60 mAh g −1 in the existing reported works) hinders their further development. Herein, the ion insertion is first proposed to double the capacity of PBAs by unlocking the inert-site. Using NH 4 + -rich copper hexacyanoferrate as a representative, trace amounts of induced ion in the electrolyte can change the electronic states of atoms at the inert site to achieve much higher capacity. What's more, the construction of NH 4 + -rich high-entropy Prussian blue (N-HEPBA) further facilitates structural stability. N-HEPBA unlocked by corresponding induced ions can exhibit an impressive specific capacity (129 mAh g −1 at 0.1 A g −1 ), which is the highest and approximately twice that of reported PBAs for aqueous AIBs. Meanwhile, it delivers excellent cycling stability with nearly 100% capacity retention achieved over 1000 cycles at 2 A g −1 . This innovative unlocking method can provide an effective way to obtain high-capacity PBAs in AIBs, thus promoting the development of large-scale energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xuechun Zhou,Xianhao Chen,Boxuan Li,He Zhu,Si Lan,Horst Hahn,Tao Feng
Electrochemical water splitting is the most promising green method for hydrogen production. In this work, the traditional Prussian blue analogs were endowed with the new concept of high entropy to bring a breakthrough in electrocatalytic performance. A classic two-step synthetic strategy was employed to fabricate the high-entropy FeCoNiCr 6 P nanoparticle via phosphating the FeCoNiCr 6, which was prefabricated using a facile coprecipitation method. The phosphides can trap protons by acting as bases to promote the discharge step faster. FeCoNiCr 6 P requires a lower overpotential of only 268.3 mV at a current density of 100 mA cm −2 for OER. The FeCoNiCr 6 P//FeCoNiCr 6 P electrochemical water splitting couple can realize a low voltage of 1.58 V to at 10 mA cm −2 current density. Furthermore, the electronic states and coordination environment of catalyst active sites were investigated to get deeper insight into material design.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energies
·
2024
·Vol. 17
·期 5
·1154
·
IF 3
Zhiqing Xiao,Xiubin Zhu,Lu Bai,Zhicheng Liu
Metal-organic frameworks are becoming increasingly important in electrocatalysis as the hydrogen production sector grows. However, their electrocatalytic capability is limited by their inclination to agglomerate and the insufficient exposure of active sites. In this work, a three-step strategy was used to develop a bifunctional electrocatalyst with porous Prussian blue analogs supported on carbon nanofibers. The use of electrospun carbon nanofibers as conductive substrates can successfully address the problem of easy aggregation. Moreover, the etching procedure with tannic acid creates a porous structure that effectively regulates the electrical structure and exposes additional active sites. The resulting catalyst performs well in both the hydrogen evolution reaction and the oxygen evolution reaction, and also exhibits good stability in overall water splitting. The findings of this study present new concepts for the design and fabrication of metal-organic frameworks-based materials in the realm of electrocatalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 6
·677
·
IF 2.9
Yue Chang,Kaimin Chen,Ziwei Li,Xueke Zhang,Chenming Xu,Jihu Wang,Shaoguo Wen
Faced with higher demands of pigments in various applications, the performance of pigments in a specific system is in urgent need of optimization and improvement. Polyorganosiloxane (POS) stands out among various encapsulating polymeric materials for pigment modification due to its superior thermal stability and alkali resistance. However, the inherent hydrophobicity of POS causes poor stability in aqueous systems, which is usually applied in environmentally friendly applications. Grafting hydrophilic polymer chains on the surface of POS could improve water dispersity. In addition, the encapsulated pigment can also be endowed with various functionalities by selecting or combining grafted polymers. Herein, we reported a strategy to encapsulate Prussian blue (PB27) with POS grafted with poly(acrylic acid) (PAA) or poly(N-(2-hydroxyethyl) acrylamide) (PHEAA) to allow better stability and functionality of the composite pigment particles, denoted as PB27@POS@PAA or PB27@POS@PHEAA, respectively. The effect of the number of monomers and the amount of initiator potassium persulfate (KPS) on the brush thickness of the grafted polymers was studied, along with various performance properties and the functionality of PB27@POS@PAA and PB27@POS@PHEAA. The dispersity, alkali resistance, and high-temperature stability are studied. The brush-like composite pigment performs better after centrifugation (5000 rpm, 30 min) or treatment under 90 °C when the dosage of grafting monomer AA or HEAA reaches 400 wt%. Optimal alkali resistance was obtained for PB27@POS@PAA (AA, 200 wt%) with a particle size variation of only 31 nm after 8 h. Comparably, PB27@POS@PHEAA behaved worse under similar conditions. Moreover, PB27@POS grafted with PAA was responsive to pH and that with PHEAA showed excellent antifouling properties, which could also be replaced by other functional monomers if needed.
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 FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Yi He,Runzi Zhang,Shunbi Xie,Xiang He,Xiaoyu Yang,Yao Liu,Mengjun Wang
Food safety has become a significant global concern, with particular attention on pesticide residues in agricultural products. Glyphosate, as a pesticide, poses a serious threat to human health and the environment when present as residue in agricultural products. In this study, we utilized MOF as a framework to prepare concave-structured bimetallic prussian blue nanozyme@silver (Co-Fe PBA@Ag). This nanozyme with sunken surface and synergistic effect of Ag nanoparticles exhibited high catalytic activity than common nanozyme and could catalyze TMB to generate oxTMB under the action of hydrogen peroxide, resulting in a color change from colorless to blue in the solution. However, when the target glyphosate was present, it could inhibit the activity of OH · and consequently blocked the color change reaction, causing the solution to turn from blue to colorless. Based on this principle, we established a triple-mode detection system: colorimetry, smartphone app analysis, and SERS for detecting glyphosate residues in agricultural products such as honey, potatoes, and tea leaves. This triple-mode sensor integrated point-of-care detection capability via colorimetry, sensitive monitoring through smartphone app and accurate detection using Raman technology. It showed potential for the implementation of practical on-site monitoring of pesticide residues in agricultural products.
研究领域:
食品安全
·
纳米生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 3
·2049-2053
·
IF 1.563
Ren Qiaoqiao,He Jingjing,Wang Huihui,Xu Shanling,Wang Zhigang,Miao Yuqing
The self-assembly of nanomaterials into ordered two- or three-dimensional structures has been extensively explored over the past years due to the great application potential. This paper reports a simple one-step methodology for the synthesis and assembly of Prussian blue/polypyrrole
(PBPPy) nanocomposites into close-packed monolayer at a toluene-water interface where the formation of PBPPy and evaporation of organic phase happen simultaneously. The formed films could be easily transferred onto the glass carbon surface by layer-by-layer technique. The obtained PBPPy nanocomposites
and their assembled film were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, UV-vis spectroscopy and cyclic voltammetry. The PBPPy nanocomposite film on the electrode surface exhibits excellent electron transfer and high electro-catalysis toward the
reduction of H2O2. Herein, PPy component in PBPPy nanocomposites plays a great role in this great electrochemical performance. On the one hand, the presence of PPy is helpful of the formation of close-packed monolayer of PBPPy nanocomposites, and the adhesion of the ordered
monolayer or multilayer onto the electrode surface due to the molecular interaction of PPy or the surface group of electrode. On the other hand, the conductive PPy facilitates the electron transfer between PB and PB or PB and electrode. The suggested method can be extended to a wide range
of nanomaterials assembly and devise development.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）