Catalysts
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2026
·Vol. 16
·期 5
·448
·
IF 4.5
Shaomeng Huang,Jiawen Sheng,Yiqing Xu,Liping Wang,Feijian Jing,Qiongqiong He
1O2has significant advantages over free radicals in Fenton-like reactions, but the induction of a single1O2reaction pathway is challenging and is often accompanied by free radical reactions and direct electron transfer pathways. In this study, Zn-O-C/N and Zn-S/O-C/N catalysts were synthesized by controlling the doping of the S element, and the single1O2reaction pathway was successfully induced. Furthermore, Zn-O-C/N performed better than the Zn-S/O-C/N system, with higher phenanthrene (PHE) degradation rates of 76.14% compared to 62.86%. And Zn-O-C/N can achieve a maximum degradation rate of 85.62% under the developed optimization condition. The characterization results revealed that the ZnO active sites are located on the surface of the Zn-O-C/N catalyst and participate in electron mediation together with C-N. ZnS was generated with the doping of S, speculating that a large amount of ZnS with low catalytic activity is generated and occupies the active sites, thereby inhibiting the catalytic activity. Additionally, only1O2was generated in the two systems, without the formation of free radicals and the occurrence of direct electron transfer reaction. However, the Zn-O-C/N catalyst has been proven to have strong stability and a low amount of dissolution, demonstrating environmental safety. This study confirmed the inhibitory effect of S on the activity of the Zn-O-C/N system and provided a synthesis strategy for the catalyst design, which can only induce the1O2reaction pathway.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Siguang Feng,Liangpeng Tang,Youjie Hua,Junjie Zhang
Currently, transition metal oxides (TMOs) are increasingly recognized as viable anode materials for lithium-ion batteries (LIBs). Among them, V 2 O 5 has become a research focus in view of its high theoretical specific capacity, but its relatively low electrical conductivity and practical cycling capacity limit its application. It is shown that the amorphous V 2 O 5 -P 2 O 5 negative electrode material, due to its glassy structure, on the one hand, inhibits the volume strain and particle pulverization of graphite and vanadium components during charging and discharging processes and reduces the volume expansion phenomenon in battery cycling, and, on the other hand, the formation of ion-conducting interfacial layer (PO 4 3 with Li⁺ -network) to promote lithium ion transport, which has a broad application prospect. Based on this, a series of (X) graphite-(100-X) vanadium-pentoxide glass composite anode materials were prepared by mechanical ball milling method in this paper. The addition of graphite provides a stable layered structure and conductive network, realizes the reversible embedding/de-embedding of lithium ions, improves the electrical conductivity of the composite materials, and reduces the charge transfer resistance of vanadium-phosphorus glass anode materials in the cycling process. The performance of the five groups of composite anode materials showed an increasing and then decreasing trend, with the best performance observed in the 40% graphite-60% vanadium-based glass composites sample. Even after undergoing 500 cycles at 500 mA·g −1 , the material maintained high discharge and charge capacities of 509.3 and 510.2 mAh·g −1 , respectively, and the electrode sheet's surface remained relatively flat after cycling, with no obvious swelling, showing excellent cycling stability.
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CHEMICAL PHYSICS
·
2026
·
IF 2.8
Zilong Liu,Fengzhi Guo,Huan Wang,Tianfang Yang,Yanxiao Hei,Xin Wang,Xiaonan Hou,Zhenxuan Yue,Weichao Sun
The efficiency of chemical enhanced oil recovery (EOR) is significantly influenced by the adsorption behavior of surfactants on rock surfaces, a phenomenon not fully understood in terms of molecular structuring and interfacial dynamics. In this study, we present a multi-scale investigation that integrates static adsorption experiments, quartz crystal microbalance with dissipation (QCM-D), and molecular dynamics (MD) simulations to elucidate the adsorption characteristics of two representative nonionic and anionic surfactants, Triton X-100 and sodium dodecyl benzene sulfonate (SDBS). Their adsorption capacities followed the order: montmorillonite > calcium carbonate > silicon dioxide. The adsorption isotherm of surfactants on calcium carbonate and silicon dioxide followed the Langmuir model, while adsorption on montmorillonite aligned more with the Freundlich model. Kinetic studies indicated that the adsorption processes for both surfactants followed the pseudo-second-order model. Thermodynamic analysis revealed that the adsorption processes were both exothermic and spontaneous. Notably, QCM-D measurements further confirmed bilayer adsorption structures for both surfactants at the solid-liquid interface. Complementary MD simulations provided molecular-level insights into adsorption energy, conformational arrangement, spatial distribution, and hydrogen bonding networks, revealing distinct interaction mechanisms for the two surfactants. The obtained results offer a comprehensive understanding of surfactant-rock interactions, which are crucial for optimizing chemical flooding processes in EOR applications.
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Journal of Physical Chemistry C
·
2026
·
IF 3.4
Tao Song,Ji-Zhong Liu,Ke Wang,Shu-Yan Wang,Shi-Ji Li,Qiang Wang,Hao-Li Zhang
Indium-based halide perovskites oftentimes exhibit limited photoluminescence quantum yield (PLQY) due to weak optical absorption, which restricts their utility in luminescent applications. However, self-trapped exciton (STE) modulation through crystal engineering offers a promising pathway to enhance emission efficiency. In this study, we report the low-temperature (20–85 °C) synthesis of centimeter-scale lead-free perovskite single crystals of CsIn1–xSbxCl4, which demonstrate intense broadband STE emission at room temperature and achieve an unprecedented PLQY of 100%, the highest reported value for indium-based halides to date. Femtosecond spectroscopy elucidated the physical origin by mapping the complete dynamics: the sub-picosecond (sub-ps) formation of the singlet 1STE, its transition to the triplet 3STE within tens to hundreds of ps, and the subsequent μs-scale radiative recombination. This work thus offers critical insights into STE-driven design strategies for next-generation optoelectronic devices of single component white-light emission.
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JOURNAL OF MOLECULAR STRUCTURE
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2022
·
IF 3.841
Wei Zhang,Yong-Zhuan Zhang,Ji-Min Yang
The separation of synthetic dyes from industrial wastewaters is an important objective in addressing water pollution. The removal of pollutant dyes from industrial wastewater prior to its release into the environment is an essential task; thus, synthesizing new adsorbent materials with superior adsorption efficiency is an important undertaking. Herein, we report the synthesis of MIL-100(Fe)@GO (graphene oxide) composites exhibiting superior adsorption performance toward methyl orange (MO), Congo red (CR), methylene blue (MB), and acid chrome blue K (AC). The room-temperature adsorption capacities of MIL-100(Fe)@GO-1 for these dyes were 533.7 (MB), 760.1 (MO), 1386.3 (AC), and 1786.6 (CR) mg g –1 , exceeding those values previously reported for pristine MIL-100(Fe) by 31.1%, 17.8%, 54.8%, and 8.9%, respectively. The adsorption behavior of the composites can be described on the basis of the structural and morphological characteristics and zeta potential of MIL-100(Fe)@GO and the adsorption capacity and structural characteristics of the dyes. The adsorption uptakes of MIL-100(Fe)@GO toward the pollutant dyes was controlled by the synergistic effects of the hydrogen-bonding, hydrophobic interactions, and π–π interactions and agglomeration pores of MIL-100(Fe)@GO. The obtained results revealed that the synergetic interplay of electrostatic, hydrogen-bonding, π–π, and hydrophobic interactions and adsorption space led to two distinct adsorption regimes for MO and AC depending on the adsorbate concentration.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yanshu Luo,Bingqiong Tan,Xianghui Liang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
Metal organic frameworks (MOFs) MIL-100(Fe) is considered to be a promising porous adsorbent for dehumidification due to its good hydrophilicity and hydrothermal stability. However, the powdery MIL-100(Fe) prepared by the conventional hydrothermal method is not suitable for industrial rotary desiccant dehumidifier. In order to produce a high-performance rotor core component, a new dry gel conversion in situ synthesis strategy for glass-fiber MIL-100(Fe) monolithic adsorbent was proposed in this paper. The effects of the reaction sol concentration on the crystalline phase, morphology, pore structure , adsorption/desorption performance and the cycling stability of the monolith were discussed in detail. The results showed that MIL-100(Fe) crystals which evenly dispersed in the surface and voids of glass fiber, could be conveniently synthesized in the reaction sols with molar ratios of 1Fe (III)/0.67BTC/xH 2 O (x = 93–185). Among them, the MIL-100(Fe) monolith obtained at x = 93 exhibited a high loading (85.7%), large BET specific surface area (1441 m 2 /g), S-shaped water vapor adsorption isotherm and high saturated adsorption ratio (0.496 g/g) at 298 K and 60% RH , low desorption activation energy (48.28 kJ/mol) as well as a reliable cycling stability. Favorable adsorption/desorption performance of MIL-100(Fe) monolith and convenient dry gel preparation process provide a guidance for the manufacture of high-performance dehumidification rotary wheel.
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International Journal of Environmental Science and Technology
·
2023
·Vol. 20
·期 12
·13399-13410
·
IF 3.1
Xiong H.,Peng S.,Zhang B.
Nonionic surfactants with ideal surface properties and lower ecotoxicities have been highly attended in metal bioleaching and pollutant bio-treatment in environmental science field. In this study, both Acidithiobacillus ferrooxidans HX3 and Tween 80 (or Triton X-100) presence in cultures, bio-production and development of schwertmannite as a potential metal scavenger were investigated. To explore their correlations, the resulting ferric oxyhydroxides under various surfactant levels (lower/optimal/higher ones for Gp I/II/III treatments) were identified by many characterization methods. Result showed that after 48 h of normally bacterial reproduction, surfactant-rich cultures with Tween 80 more than 50 mg/L (25 mg/L for Triton X-100) could only achieve down 80% of ferrous oxidation percent and 10 7 cells/mL of cell numbers, while those with lower surfactant level were ahead 12 h. Culture pH values decreased to about 2.4 (or 2.0) from initially 2.8. All initial ferric oxyhydroxides were only pincushion-schwertmannite spheres. When cells sequentially reproduced within 36 h–48 h, presence of surfactants (except for Triton X-100 at 75 mg/L) could induce schwertmannite-pincushion assembling on developed spherical particles with a little of diamond-jarosite. And then during bacterial stability state (48 h–72 h), the pincushion assemblages on developed schwertmannite-spheres would disappear, following occurrence of more jarosite amount. Obviously, schwertmannite stability and morphological evolvement were affected by type and level of the added surfactants. These results will give a convincing proof for understanding biomineralization principles of iron minerals in natural environments with nonionic surfactants.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yanshu Luo,Bingqiong Tan,Xianghui Liang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
With an S-shaped water sorption isotherm and high vapor uptake, as one of the famous metal organic frameworks (MOFs), MIL-100(Fe) (MIL stands for Materials of Institute Lavoisier) has been considered as a very promising candidate for adsorption heat pumps. Usually, MIL-100(Fe) is synthesized by a hydrothermal method under harsh synthesis conditions, such as high temperature and vapor pressure. In this study, in the absence of any solvent, a novel facile MIL-100(Fe) synthetic strategy, which used the dry gel conversion method, was developed. X-ray diffraction (XRD) patterns showed that the new dry gel conversion technology could expediently synthesize MIL-100(Fe) with a low reaction temperature (140 °C) and high yield (85%), which is superior to the hydrothermal method with reaction temperature of 160 °C and yield of 76%. Scanning electron microscopy (SEM) images illuminated that, compared with the conventional synthesized MIL-100(Fe) in the liquid aqueous solution, the new process synthesized one in the dry gel state exhibited a smaller crystal size (about 50 nm) due to the confined growth of the crystals. The pore analysis indicated that the MIL-100(Fe) synthesized by both processes had a similar hierarchical porous structure with the mesopore and micropore; however, compared with the traditional synthesized adsorbent, the new technology synthesized one possessed a larger pore volume due to the formation of the extra mesopores from the interconnection of the nanocrystals. The static adsorption curve exhibited that the water vapor adsorption capacity of MIL-100(Fe) synthesized by the new process was a little higher than the one synthesized by the traditional hydrothermal method. Moreover, it had a smaller desorption activation energy and better cycle stability.
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CRYSTENGCOMM
·
2018
·Vol. 20
·期 41
·6580-6588
·
IF 3.304
Pengwei Li,Dingding Li,Lina Liu,Anli Li,Cuixian Luo,Yue Xiao,Jie Hu,Huabei Jiang,Wendong Zhang
In this work, a concave structure of Cu2O truncated microcubes with {100} facet erosion has been successfully synthesized by a facile top-down etching method. Air and PVP were employed as an etchant and a shape controller agent, respectively. For the facet-selective capping of PVP on Cu2O {111} planes, the traditional relatively low energy {100} facets of Cu2O truncated microcubes would be selectively etched along their [100] zone axis in a top-down manner. The {100} facet etched Cu2O concave truncated microcubes exhibited highly improved photocatalytic activities (2.15 and 1.21 times, respectively) compared to that of the basic structure and the {111} facet etched samples on the degradation of Congo red (CR), displaying distinct facet-dependent photocatalytic characteristics, excellent stability and reusability. This work not only builds an efficient photocatalyst, but also provides a novel method to fabricate a variety of architectures with low energy facets etched and highly active crystal planes exposed, which is extremely important for the improvement of catalytic activities.
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ChemCatChem
·
2014
·Vol. 7
·期 3
·441-449
·
IF 5.044
Hui Wan,Chong Chen,Zuowang Wu,Yigen Que,Yu Feng,Wei Wang,Lei Wang,Guofeng Guan,Xiaoqin Liu
Graphical Be more active: A new strategy is proposed to construct the ionic liquid, polyoxometalate (POM), and metal–organic framework (MOF) composite. POM bridges the gap between the ionic liquid and the carrier (MOF); thus, the heteropolyanion-based ionic liquid can be encapsulated within the cages of MIL-100 (MIL=Materials of Institut Lavoisier) through anion exchange. The POM–ionic-liquid-functionalized MOF demonstrates high catalytic activity for the esterification of oleic acid with ethanol and is stable in the liquid-phase reaction, with no obvious leaching of the active component. A new strategy was proposed to construct the ionic liquid, polyoxometalate (POM), and metal–organic framework (MOF) composite. The POM-based MOF was synthesized by using the direct hydrothermal method. The sulfonic acid group-functionalized ionic liquid was used for further modification of the hybrid material to realize the encapsulation of the heteropolyanion-based ionic liquid within the cages of the MOF. The catalysts were characterized by using XRD, N 2 adsorption–desorption, FTIR, SEM, TEM, elemental analysis, and TGA. The results indicated that the heteropolyanion-based ionic liquid had been successfully encapsulated within the cages and the structure of MIL-100 (MIL=Materials of Institut Lavoisier) remained intact. The POM–ionic-liquid-functionalized MOF, with high content of the active component, had both Lewis and Brønsted acid sites, which led to high catalytic activity for the esterification of oleic acid with ethanol. The esterification reaction conditions were optimized by using response surface methodology (RSM), and the corresponding conversion of oleic acid reached 94.6 %. The catalyst could be easily recovered and reused six times without significant loss of activity.
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CRYSTENGCOMM
·
2014
·Vol. 16
·期 15
·3091-3096
·
IF 3.858
Yong Yang,Guozhong Wang,Quan Deng,Shenghong Kang,Dickon H. L. Ng,Huijun Zhao
High-energy {100} faceted single crystal TiO2 nanorods were synthesized by a facile hydrothermal method. An interesting phase transition from the orthorhombic hydrogen titanate to anatase TiO2 was observed during the reaction process. A structural formation model of the TiO2 nanorods was proposed based on experimental evidence. The resultant {100} faceted TiO2 nanorods exhibited considerably enhanced photocatalytic activity towards degradation of organic pollutants and removal of heavy metal ions owing to the special one-dimensional structure with the reactive {100} facets, thus showing a great potential in the field of water treatment. At the same time, the synthetic route provided guidance for the synthesis of high-energy {100} facets using EDTA and urea as effective modifiers. This approach may be extended to synthesize other functional oxide crystals with well-defined morphologies and to increase the percentages of certain exposed facets.
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CHROMATOGRAPHIA
·
2024
·
IF 1.2
Shao Xiaozhen,Xu Guangfu,Chen Jiaquan,Miao Pandeng,Yang Ke,Du Yingxiang,Yu Tao
Metal–organic frameworks (MOFs) have a wide range of applications in separation and analytical sciences due to their unique structures. MIL-100(Fe) was immobilized on the inner wall of the capillary column based on the immobilized cysteine (Cys)-triggered in situ growth (ICISG) strategy. By applying this column to capillary electrophoresis, a novel enantioselective separation system based on MIL-100(Fe) nanomaterial was established. By utilizing lactobionic acid (LA) as the chiral selector and optimizing the experimental conditions such as buffer pH, LA concentration and the methanol addition ratio, the CEC system demonstrated a significantly enhanced enantioseparation ability for six basic drugs. The modified capillary column was characterized by scanning electron microscope (SEM), energy-dispersive X-ray spectroscope (EDS) and X-ray diffractometer. The experimental results showed that MIL-100(Fe) was successfully grown on the inner wall of the capillary column. In the present study, the repeatability of the coated column was investigated and the relative standard deviations (RSDs) of the resolution and the migration time for intra-day, inter-day and inter-column were within 8%, proving the good repeatability of the coated column.
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