JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Tian Tian,Xuefeng Hu,Yao Huang,Huixian Du,Chao Wang,Mina Yang
The widespread utilization of fossil fuels has resulted in a significant increase in CO 2 emissions, leading to a variety of environmental issues. The photocatalytic conversion of CO 2 into fuel presents an effective solution to both the energy crisis and environmental warming. Therefore, the selection of a suitable catalyst is paramount. However, traditional photocatalysts often encounter challenges such as rapid electron-hole recombination and limited exposure of active sites. To improve these limitations, this study introduces AFM-X, a heterojunction catalyst composed of Au/Fe 3 O 4 /MIL-101(Fe)-X, which facilitates the formation of open metal sites (OMS) that enhance the effective separation of photogenerated carriers. In AFM-X, OMS function as Lewis acid sites, thereby enhancing CO 2 adsorption. The presence of Au nanoparticles (NPs) introduces additional active sites for CO 2 reduction. The synergistic effect between OMS and Au NPs increases the catalyst’s active sites, while the heterojunction construction promotes electron transfer, thereby enhancing CO 2 photocatalytic reduction efficiency. The CO generation rate of AFM-2 reached 98.8 μmol g −1 h −1 , surpassing those of FM, MIL-101(Fe), Fe 3 O 4 , and Au NPs, by 4.1, 6.3, 6.2, and 3.2 times, respectively. Furthermore, AFM-2 maintains stable performance over a 40 h cycle test. In-situ DRIFTS spectroscopy reveals that CO 2 reduction occurs through two parallel pathways. This study offers new insights into the design of composite photocatalytic materials, highlighting the effectiveness of OMS Lewis acid sites in significantly enhancing the photocatalytic reduction of CO 2 .
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-11
·
IF 5.3
Du Juan,Li Zongshuang,Liu Kai,Guo Jiangli,Bai Yanhong
A novel colorimetric aptasensor assay based on the excellent magnetic responsiveness and oxidase-like activity of Fe 3 O 4 @MIL-100(Fe) was developed. Fe 3 O 4 @MIL-100(Fe) absorbed with aptamer and blocked by BSA served as capture probe for selective isolation and enrichment of Listeria monocytogenes one of the most common and dangerous foodborne pathogenic bacteria. The aptamer absorbed on Fe 3 O 4 @MIL-100(Fe) was further used as signal probe that specifically binds with target bacteria conjugation of capture probe for colorimetric detection of Listeria monocytogenes , taking advantages of its oxidase-like activity. The linear range of the detection of Listeria monocytogenes was from 10 2 to 10 7 CFU mL −1 , with the limit of detection as low as 14 CFU mL −1 . The approach also showed good feasibility for detection of Listeria monocytogenes in milk and meat samples. The spiked recoveries were in the range 81–114% with relative standard deviations ranging from 1.28 to 5.19%. Thus, this work provides an efficient, convenient, and practical tool for selective isolation and colorimetric detection of Listeria monocytogenes in food. Graphical Abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ziqiong Wang,Yan Wang,Wanting Li,Siyu Liu,Ling Zhang,Jiani Yang,Caixia Feng,Ruifeng Chong,Yanmei Zhou
Solar-light-driven reduction of CO 2 into renewable fuels has great potential in the production of sustainable energy, addressing the energy crisis and environmental problems simultaneously. However, it is a significant challenge to achieve high selectivity for the conversion of CO 2 into CH 4 , which is a type of fuel with a high calorific value. Herein, carbon quantum dots (CQDs) were integrated with an oxygen vacancy modified nickel-based metal organic frameworks (NiMOFs) to form the CQDs-X/NiMOF V series, which exhibited superior performance for CO 2 photoreduction into CH 4 compared with pure NiMOFs in the presence of hole scavengers under visible light irradiation. The highest yielding rate of CH 4 (1 mmol g −1 h −1 ) and selectivity (97.58 %) were obtained using a CQDs-25/NiMOF V catalyst. Most importantly, in diluted CO 2 atmosphere, the yield of CH 4 was almost unchanged and the selectivity of CH 4 over CQDs-25/NiMOF V was higher than that in pure CO 2 . The superior performance of CQDs-25/NiMOF V may be attributed to the following two factors: (i) both CQDs and oxygen vacancies facilitate the transmission of electrons to promote the eight-electron reaction producing CH 4 , and (ii) oxygen vacancies can act as the electron trap to capture the photogenerated electrons to react with adsorbed CO 2 on Ni 2+ . This study offers a valuable strategy for designing efficient photocatalysts to convert CO 2 into CH 4 with superior selectivity.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tianyun Zhao,Qiuwan Shen,Martin Andersson,Shian Li,Jinliang Yuan
High-entropy perovskite catalyst was synthesized and utilized for the first time in the MSR catalytic reaction. Among the HEPs, La(CoCuFeAlCe) 0.2 O 3 exhibited excellent MSR activity and high selectivity. The mechanism of the MSR reaction on the catalyst (100) surface was studied by employing DFT. The results indicate that the surface of La(CoCuFeAlCe) 0.2 O 3 catalyst has the lowest energy barrier, where the aldehyde hydrogenation reaction is the rate-determining step, explaining its high activity and selectivity. This research contributes additional evidence for the creation of high-entropy perovskite catalysts for MSR.
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Materials Today Chemistry
·
2023
·
IF 7.3
C. Jiang,X. Wang,X. Xiao,M. Piao,Y. Jia,J. He,L. Hu,Y. Zou,L. Sun,L. Chen
Chemical complex borohydride is a promising hydrogen storage material due to its large gravimetric and volumetric hydrogen capacities. However, the high dehydrogenation temperature and sluggish kinetics still place strong restrictions on its practical application in the hydrogen storage field. In this work, a synergetic approach of partial cation substitution and catalysis is developed to enhance the hydrogen storage properties of LiBH 4 . The Li/Mg based dual-cation borohydride (LiMg 2 (BH 4 ) 5 , LMBH) was successfully synthesized by wet chemical ball milling of LiBH 4 and MgCl 2 . The optimal (LMBH (4.5:1) sample, LiBH 4 and MgCl 2 in molar ratios of 4.5:1, possesses a maximum hydrogen desorption capacity (11.27 wt%) and the outstanding initial decomposition temperature (∼250 °C). Importantly, the LMBH (4.5:1) doped with TiF 3 shows a remarkable onset dehydrogenation temperature as low as 97.2 °C, which is about 190 °C lower than that of pristine LiBH 4 . The LMBH (4.5:1) doped with TiF 3 system releases 7.98 wt% H 2 within 170 min below 350 °C. And the dehydrogenation product of doped composite can reversibly absorb ∼4.72 wt% H 2 at a relatively moderate temperature of 280 °C, which is substantially lower than the reversible hydrogen absorption temperature of previous modified borohydride systems. Based on the structural characteristic analyses, the TiF 3 reacts with LMBH (4.5:1) to in-situ form actual catalytic components of TiB 2 and TiH 2 as the actual catalysts for LMBH (4.5:1), resulting in the improved hydrogen re/dehydrogenation properties. The synergetic modification of Li/Mg dual-cation substitution and TiB 2 /TiH 2 catalysis may lead to the development of light-metal borohydrides with outstanding hydrogen storage properties.
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DESALINATION
·
2026
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IF 9.9
Linkai He,Xingqiang Wu,Yun Tian,Yixin Pan,Faquan Wu
The release and dispersion of uranium during mining activities and fuel/waste management processes in nuclear power plants pose serious environmental risks, particularly in aqueous systems. In such environments, uranium exhibits high solubility and strong mobility, leading to severe radioactive contamination of groundwater, soil, and ecosystems. Therefore, remediating uranium-contaminated environments remains a significant scientific and technological challenge. To address this issue, the present study exploits the high specific surface area and tunable pore architectures/functional sites of metal-organic frameworks (MOFs). Using a controlled synthesis strategy, a core-shell (Fe-Ni) galvanic cell structure was constructed and integrated with MIL-100(Fe) to fabricate the Ni-Fe-MIL-100(Fe) composite, enabling highly efficient and synergistic removal of U(VI) via an “adsorption-reduction-complexation” mechanism. Experimental results demonstrate that the maximum uranium uptake capacity reached 3038.19 mg·g −1 at 303 K and pH = 5, with a significantly enhanced removal efficiency. The kinetic analysis indicates that the uranium adsorption process is well described by the pseudo-second-order model. Combined with density functional theory (DFT) calculations, the electronic transfer channels of the structure were elucidated, revealing that they drive the reduction of U(VI) and facilitate its coordination and immobilization at multi-metal and oxygen-containing sites. These findings confirm that U(VI) removal by the composite material proceeds via a coupled chemical reduction and complexation process, thereby clarifying the underlying adsorption mechanism. Moreover, in mixed-ion solutions and real seawater, the composite maintains high adsorption capacity and excellent selectivity, demonstrating strong potential for uranium immobilization and recovery in the remediation of radioactive wastewater.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Hafiz Nabeel Ahmad,Yueyuan Yong,Noshaba Munawar,Xinxin Huang,Anzal Akbar,Jie Zhu
MIL-100(Fe) was successfully synthesized at room temperature and incorporated in bilayer film matrix. • MOFs and betalain generate molecular interactions within the film matrix as a filler. • Active films exhibited strong barrier, antioxidant and antibacterial properties. • These films prolonged the shelf life of beef and can be used for beef freshness monitoring. • This study offers novel insights into the development of active, smart food packaging. Meat is prone to microbial spoilage and faces significant risks from foodborne illnesses. This study introduces an innovative approach utilizing metallic organic frameworks (MOFs) as antibacterial agents and beetroot extract (BTE) for pH sensitivity to address existing challenges. Furthermore, this study utilized tri-polymeric concept via protein-polysaccharide combination, which includes sodium alginate to stabilize betalain, and gelatin and chitosan to give strong mechanical properties. The MOFs were synthesized using green synthesis, confirmed through structural and multispectral analysis. Betalain extracted from beetroot was incorporated into these tri-polymeric films. The developed films demonstrated excellent antioxidant and antibacterial properties. Furthermore, the pH sensitivity of betalain renders these films suitable for use as biosensors, with the quality stage of beef successfully assessed. Moreover, the films exhibited strong UV, water, and oxygen barrier properties. Atomic force microscopy revealed differences in surface morphology, with a uniform distribution, and films showed high mechanical strength. Concurrently, the addition of MOFs and BTE extract potentially extended the shelf life of beef by up to three days compared to control tri-polymeric films. These multifunctional films present new strategies employing novel antibacterial materials and tri-polymeric combinations which can efficiently preserve beef quality, while BTE indicates spoilage in real time. Download: Download high-res image (362KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Peizhen Yang,Yuhan Long,Wenli Huang,Dongfang Liu
Singlet oxygen ( 1 O 2 )-dominated advanced oxidation processes has drawn widespread attention for selective oxidation of organic pollutants in complex water environments. However, the high efficiency and selectivity of 1 O 2 generation remains challenging. Herein, we develop single-atom copper anchored on Ti 3 C 2 T x MXene nanosheets (Cu-SA/MXene) by molten salt etching for the generation of 1 O 2 via peroxymonosulfate (PMS) activation. Particularly, it exhibits a high selectivity of 99.71% toward 1 O 2 generation by activating PMS, which shows outstanding catalytic activity for multiple pollutants, and strong resistance to inorganic anions. Experimental and theoretical results reveal that the Cu single atoms with three oxygen coordination environments (Cu-O 3 ) are more favorable for PMS absorption and selectively adsorb the terminal oxygen of PMS to promote the generation of SO 5 .- , resulting in the generation of 1 O 2 . A continuous-flow wastewater system by dispersing catalysts on poly (vinylidene fluoride) membrane exhibit stable catalytic activity for polycarbonate plant wastewater treatment over 8 h.
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ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Yuebei Yang,Yaozhong Wang,Xiaofei Li,Chao Xue,Zhi Dang,Lijuan Zhang,Xiaoyun Yi
The heavy-metal adsorbent ε-MnO 2 was produced through a simple, one-step oxidation-reduction reaction at three different synthesis temperatures (25 °C, 50 °C and 75 °C) and their morphology and chemical-physical properties were compared. Of the three materials, MnO 2 -25 had the largest specific surface area and the highest surface hydroxyl concentration. Its optimal performance was demonstrated by batch adsorption experiments with Pb 2+ , Cd 2+ and Cu 2+ . Of the three metals, Pb 2+ was adsorbed best (339.15 mg/g), followed by Cd 2+ (107.50 mg/g) and Cu 2+ (86.30 mg/g). When all three metals were present, Pb 2+ was still absorbed best but now more Cu 2+ was adsorbed than Cd 2+ . In order to explore the mechanism for the inconsistent adsorption order of Cd 2+ and Cu 2+ in single and competitive adsorption, we combined experimental data with density functional theory (DFT) calculations to elucidate the distinct adsorption nature of MnO 2 -25 towards these three metals. This revealed that the adsorption affinity of the (100) facet was superior to (001), and since the surface complexes were also more stable on (100), this facet was most likely determining the adsorption order for the single metals. When the metals were present in combination, Pb 2+ preferentially occupied the active adsorption sites of (100), forcing Cu 2+ to be adsorbed on the (001) facet where Cd 2+ was only poorly bound. Thus, the adsorption behavior was affected by MnO 2 -25 surface chemistry at a molecular scale. This study provides an in-depth understanding of the adsorption mechanisms of the heavy metals on this adsorbent and offers theoretical guidance for production of adsorbent with improved removal efficiency.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Si Duan,Yuan Gao,Guihong Lan,Haiyan Qiu,Bo Xu,Zhuang Xie,Songsong Xue,Tianxiong Ou
The widespread use of chlortetracycline hydrochloride (CTC) inevitably poses a potential threat to human health and the biological system, and its environmental pollution and ecotoxicological effects cannot be ignored. Herein, we adopted an in-situ growth method to immobilize the powder form of MIL-100(Fe) adsorbent into low-cost chitosan (CS) matrix for the CTC removal. Metal hydroxide (or metal oxide)/CS beads from the acid-dissolved/alkali-solidified self-sphering shaping method were employed as the substrates for MIL-100(Fe) immobilization, allowing it grow uniformly and stably. Notably, this strategy not only reduced the loss in the separation and regeneration process of powdery MIL-100(Fe), but also improved the adsorption capacity of the CS. Isotherm and kinetic studies showed that the Freundlich and PSO models can describe the experimental data better, respectively, and the maximum adsorption capacity of Langmuir can reach 578.03 mg g −1 . Further, the performance of MIL-100@CS-2 composite beads was thoroughly explored by batch experiments and response surface methodology (RSM) to obtain the optimized operating conditions with the highest CTC removal rate. By combining the density functional theory (DFT) calculation with experimental analysis, the adsorption mechanisms of pore filling, hydrogen bonding , electrostatic interaction , π-π EDA interaction, and hydrophilic interaction were proposed. This work provides a reliable basis for the development of shaping adsorbents and has potential application prospects in the treatment of wastewater containing antibiotics.
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Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-16
·
IF 12.264
Zhang Shucong,Wang Wenbin,Hu Feilong,Mi Yan,Wang Shuzhe,Liu Youwen,Ai Xiaomeng,Fang Jiakun,Li Huiqiao,Zhai Tianyou
The 2D CoOOH sheet-encapsulated Ni 2 P into tubular arrays electrocatalytic system with expediting mass transport, structural stability, and tuned electron was conceptually proposed.
The designed electrocatalysts realize expectant 1000 mA cm −2 -level-current-density hydrogen evolution in neutral water for over 100 h.
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Nano Research
·
2015
·Vol. 8
·期 10
·3237-3249
·
IF 7.01
Liang Ruowen,Jing Fenfen,Shen Lijuan,Qin Na,Wu Ling
Proper design and preparation of high-performance and stable dual functional photocatalytic materials remains a significant objective of research. In this work, highly dispersed noble-metal nanoparticles (Au, Pd, Pt) were immobilized on MIL-100(Fe) (denoted M@MIL-100(Fe)) using a facile room-temperature photodeposition technique. The resulting M@MIL-100(Fe) (M = Au, Pd, and Pt) nanocomposites exhibited enhanced photoactivities toward photocatalytic degradation of methyl orange (MO) and reduction of heavy-metal Cr(VI) ions under visible-light irradiation (λ ≥ 420 nm) compared with blank-MIL-100(Fe). Combining these results with photoelectrochemical analyses revealed that noble-metal deposition can effectively improve the charge-separation efficiency of MIL-100(Fe) under visible-light irradiation. This phenomenon in turn leads to the enhancement of visible-light-driven photoactivity of M@MIL-100(Fe) toward photocatalytic redox reactions. In particular, the Pt@MIL-100(Fe) with an average Pt particle size of 2 nm exhibited remarkably enhanced photoactivities compared with those of M@MIL-100(Fe) (M = Au and Pd), which can be attributed to the integrative effect of the enhanced light absorption intensity and more efficient separation of the photogenerated charge carrier. In addition, possible photocatalytic reaction mechanisms are also proposed.
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