CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Cong Wan,Jianwen Zhang,Honglei Zhang,Min Liu,Yiming Li,Zijun Yan,Chengheng Pang,Tao Wu
The catalytic reduction of CO₂ into valuable chemicals and fuels is a promising strategy for mitigating global carbon emissions. This study explores the synergistic co-reduction of CO₂ and H₂O using nanoscale zero-valent iron (NZVI) as a dual-function catalyst. Under light irradiation at 300 °C, the CO₂ reduction rate increased by more than 10-fold compared to dark conditions, demonstrating significant photothermal synergy. The study reveals that NZVI undergoes a phase transformation, where Fe₃O₄ functions as a photocatalyst while Fe 0 serves as an electron donor, enabling a unique dual-functionality that facilitates efficient electron transfer. The addition of 10 vol% H₂ stabilizes the reaction, leading to a higher and more consistent CO yield. When investigating the simultaneous reduction of CO₂ and H₂O, we discovered competitive adsorption and reaction pathways that significantly influence product distribution. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations revealed three distinct mechanistic pathways for CO₂ conversion: direct C O bond cleavage, a carboxylate-mediated pathway and bicarbonate-mediated pathway, with the carboxylate and bicarbonate pathways being uniquely promoted by H and OH from H₂O dissociation. The addition of H₂O into the CO₂ and H₂ reaction significantly enhanced CH₄ generation due to the extra H source from H₂O dissociation. These findings offer valuable insights into the competitive mechanistic pathways of CO₂-H₂O co-reduction and contribute to the design of more efficient iron-based catalysts for sustainable CO₂ conversion and water splitting in energy and environmental applications.
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Polymers
·
2024
·Vol. 16
·期 7
·865
·
IF 4.7
Lianguo Wang,Pei Wang,Yifan Liu,Muhammad Atae Mustafa Mahayyudin,Rong Li,Weilun Zhang,Yilan Zhan,Zhihua Li
Poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) are versatile drug nanocarriers with a wide spectrum of applications owing to their extensive advantages, including biodegradability, non-toxic side effects, and low immunogenicity. Among the numerous nanoparticle preparation methods available for PLGA NPs (the hydrophobic polymer), one of the most extensively utilized preparations is the sonicated-emulsified solvent evaporation method, owing to its simplicity, speed, convenience, and cost-effectiveness. Nevertheless, several factors can influence the outcomes, such as the types of concentration of the surfactants and organic solvents, as well as the volume of the aqueous phase. The objective of this article is to explore the influence of these factors on the properties of PLGA NPs and their drug release behavior following encapsulation. Herein, PLGA NPs were fabricated using bovine serum albumin (BSA) as a surfactant to investigate the impact of influencing factors, including different water-soluble organic solvents such as propylene carbonate (PC), ethyl acetate (PA), and dichloromethane (DCM). Notably, the size of PLGA NPs was smaller in the EA group compared to that in the DCM group. Moreover, PLGA NPs showed excellent stability, ascribed to the presence of the BSA surfactant. Furthermore, PLGA NPs were co-loaded with varying concentrations of hydrophilic drugs (doxorubicin hydrochloride) and hydrophobic drugs (celecoxib), and exhibited pH-sensitive drug release behavior in PBS with pH 7.4 and pH 5.5.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 8
·087501
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IF 4.316
Shiying Zhou,Peng Zhao,Jilin Zheng,Sha Chen,Mei Yang,Danqun Huo,Changjun Hou
Flexible electrodes play an increasingly important role in the development of portable and wearable electronics. Herein, a novel flexible and self-supporting electrode supported on active electrocatalyst (Au/Fe–Co@C–Nx/GO/CC) has been prepared for in situ detection of extracellular H2O2. The Fe, N co-doping of Fe–Co@C–Nx with abundant active sites promotes electron transfer efficiency, and Fe–Co@C–Nx nano-arrays with a unique spatial structure are beneficial for the deposition of Au nanoparticles (AuNPs). Graphene oxide (GO) serves as a chemical bridge to ensure that the nanomaterials grow more uniformly and firmly on the carbon cloth. Meanwhile, the flexible carbon cloth possesses stable mechanical and electrochemical properties. Based on these unique superiorities, this flexible electrode exhibits excellent sensing performance toward H2O2 with high selectivity and sensitivity, low LOD (0.56 μM), and wide linear range (from 5 to 21195 μM). Most importantly, the prepared electrode can adhere to cells for in situ and sensitive determination of H2O2 released from cells. Compared to detecting H2O2 in cell suspensions, in situ detection can capture the signal molecules more sensitively and effectively, avoiding the diffusion of H2O2 from the solution to the electrode surface. This flexible electrode has great potential in development of molecular detection and portable electronics.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 32
·17261-17269
·
IF 12.732
Jinji Liang,Chenhan Lin,Xiangcong Meng,Min Liang,Jie Lai,Xuhong Zheng,Quanzhuang Huang,Liying Liu,Zhicong Shi
Mn-based layered oxides, as potential cathodes for potassium-ion batteries (PIBs), face major challenges such as consecutive phase transition, serious capacity loss, and sluggish K+ transport kinetics. Herein, Co–Mg co-substituted K0.45Co1/12Mg1/12Mn5/6O2 is designed as a promising cathode material for PIBs to conquer the above issues in this work. Co3+–Mg2+ ions occupying the Mn3+ sites are confirmed to effectively alleviate the Jahn–Teller distortion induced by Mn3+ ions. P3-K0.45Co1/12Mg1/12Mn5/6O2 exhibits highly reversible single-phase structural evolution during the K+ deintercalation/intercalation. In contrast, the pristine K0.45MnO2 electrode experiences incompletely reversible structural variation from a P′3 to P3 phase. The increase of structural stability in the Co–Mg co-substituted sample is the main reason leading to improved cycling stability. Moreover, K0.45Co1/12Mg1/12Mn5/6O2 delivers better rate capability resulting from faster K+ diffusion compared to K0.45MnO2. Therefore, Co–Mg co-substitution is an effective strategy to enhance the structural stability and electrochemical properties of Mn-based layered oxides in PIBs.
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ENERGY
·
2025
·
IF 9.4
Shuai Guo,Xuhai Wang,Long Gao,Chenchen Zhao,Xingcan Li,Dean Song
This study proposes an integrated co-hydrothermal carbonization (co-HTC) strategy for simultaneously purifying hydrothermal wastewater and improving the combustion performance of co-hydrochar by co-processing tobacco stems (TSs) with chemically activated coal-gasification fine slag (CAC). TSs, a major agricultural residue, generate large volumes of organic-rich wastewater during HTC, while CAC exhibits high porosity and adsorption potential. The co-HTC was performed at 250 °C and 300 °C under varying TS: CAC mass ratios (1:0–1:3). At 250 °C and a TS:CAC ratio of 1:3, COD and TOC values declined from 18,144 mg/L and 8,686 mg/L to 10,383 mg/L and 4,350 mg/L, respectively, achieving removal rates of 42.78 % and 49.92 %. At 300 °C, the removal rates remained above 42 %, despite forming more low-molecular-weight organics. CAC promoted pore development in co-hydrochar, while dichloromethane extraction exposed additional micropores and cracks, enhancing surface reactivity. The introduction of CAC reduced aliphatic and carbonyl groups in both the hydrochar and the bio-oil phases, suggesting CAC's dual role in adsorbing unstable intermediates and catalyzing aromatization. Combustion characterization showed that with increasing CAC ratio, the burnout temperature of hydrochar increased by 40 °C (from 689 °C to 729 °C), while the flammability index and combustion stability index decreased. Dichloromethane extraction improved ignition temperature, maximum combustion rate temperature, and combustion uniformity by 20–45 °C, confirming enhanced reactivity after removal of secondary char. In conclusion, co-HTC of TSs and CAC offers a sustainable route for the integrated treatment of agricultural and industrial residues, providing both wastewater remediation and high-quality carbon materials. Optimization of operating conditions is essential to balance purification efficiency and fuel quality.
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JOURNAL OF CHROMATOGRAPHY A
·
2012
·
IF 4.531
Zian Lin,Hui Huang,Xiaobo Sun,Yao Lin,Lan Zhang,Guonan Chen
A new polymer monolith with three modes of reverse-phase, hydrophilic and cation-exchange interaction was synthesized in 100 μm i.d. fused-silica capillary by in situ polymerization procedure. The pre-polymerization mixture consisted of glycidyl methacrylate (GMA) and 4-vinylphenylboronic acid (VPBA) as bifunctional monomers, ethylene dimethacrylate (EDMA) as crosslinker, 1,4-butanediol (BDO) and diethylene glycol (DEG) as binary porogenic solvents, and azobisisobutyronitrile (AIBN) as initiator. The resulting poly(GMA-co-VPBA-co-EDMA) monolith showed a relatively homogeneous monolithic structure, good permeability and mechanical stability. Different ratios of monomers and porogens were used for optimizing the properties of monolithic column. The column performance was assessed by the separation of a series of neutral solutes, charge solutes, phenols and anilines. Compared with poly(GMA-co-EDMA) monolith, the proposed monolith exhibited more flexible adjustment of selectivity in terms of hydrophobic, hydrophilic, as well as cation-exchange interaction in the same chromatographic conditions. High column efficiencies for benzene derivatives with 70,000–102,000 theoretical plates/m could be obtained at a linear velocity of 0.265 mm/s. The run-to-run, column-to-column, and batch-to-batch repeatabilities of the retention times were less than 8.23%. Additionally, the purposed monolith was also applied to efficient separation of alkaloids and proteins for demonstrating its potential in biomolecule separation.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Ze Chai,Chuanhai Jiang
The electrochemical/chemical growth of porous (Ni,Co,Cu)(OH) 2 was reported based on the corrosion behaviors of Ni-Co-Cu films in neutral salt spray . The films prepared by using electrodeposition were ternary solid solution alloys with a simple phase structure, strong texture, nanoscale grains, large microstrain and a large number of crystal defects . The unique microstructures coupled with extensive ion diffusion during the subsequent corrosion process facilitated the formation of ternary hydroxides with uniform and porous nanostructures . The ternary hydroxides composed of Ni-/Co-dominant hydrotalcite-like and Cu-dominant orthorhombic (Ni,Co,Cu)(OH) 2 could be efficiently prepared by motivating the transformation from oxide to hydroxide. The binder-free (Ni,Co,Cu)(OH) 2 electrode exhibited a high specific capacitance of 1738 F g −1 at a current density of 20 A g −1 and decent cycling stability. The electrochemical/chemical growth mode, uniform porous nanostructures and nature of the ternary hydroxides could account for the superior electrochemical performances. This work proposed a simple and green approach to prepare multicomponent hydroxides as novel electrode materials for rechargeable batteries and hybrid supercapacitors .
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Wan-Long Li,Xiao-Wei Luo,Wan-Ting Lin,Si-Yuan Zhang,Zi-Lu Zhang,Zi-Jun Zhang,Zhi-Kang Xu,Ling-Shu Wan
Nanofiltration (NF) membranes show superior ion selectivity, which, however, decreases with temperature owing to excessive pore expansion of the selective layers. Herein, an effective and feasible co -solvent strategy is proposed to improve the thermostability of polyamide NF membranes. The co -solvent systems with low interfacial tension accelerate the interfacial diffusion of aqueous monomers during the interfacial polymerization. Moreover, the enhanced compatibility between the organic phase and the nascent polyamide layer, which is assessed by the Hansen solubility parameters, facilitates the formation of selective layers with high cross-linking degree. The resultant compact selective layers possess enhanced thermostability. The optimized NF membrane exhibits a high permeance of 24.8 L·m −2 ·h −1 ·bar −1 with 98.3% MgSO 4 rejection at 85 °C. The present method shows great potential for preparing thermostable NF membranes.
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PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Bangxing Li,Wei Li,Guojie Zhang,Yanghua Wang,Xiaolin Hu
In this study, cobalt copper co-doped bismuth vanadate (CuCo-BiVO 4 ) was firstly used for tetracycline (TC) degradation. The doped BiVO 4 with different Co/Cu ratio was systematically synthesized by the hydrothermal method. The results of the photocatalytic degradation shown that Co 0.02 Cu 0.01 Bi 0.97 VO 4 exhibited the optimal degradation activity, which may attribute to the smallest grain size (338 nm) of Co 0.02 Cu 0.01 Bi 0.97 VO 4 . The elemental distribution analysis confirms the coexistence of Cu 2+ and Co 2+ dopants. XRD and XPS analysis indicate that Cu 2+ or Co 2+ dopants replaced Bi 3+ in BiVO 4 . The band gap of Co 0.02 Cu 0.01 Bi 0.97 VO 4 was 2.35 eV, smaller than pure BiVO 4 , as calculated from the Tauc diagram. The highest degradation efficiency of 81.7% can be reached within 2 h. The rest degradation efficiency can reach about 70% of fifth recycling experiment, which shows good degradation stability of Co 0.02 Cu 0.01 Bi 0.97 VO 4 . Therefore, Co-Cu co-doped BiVO 4 stratage is a promising method for TC degradation.
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ChemCatChem
·
2026
·Vol. 18
·期 3
·e01844
·
IF 4.1
Xiao Lin,Hongsen Dong,Le Xu,Shipeng Ding
Co-based catalysts were reported to be active in CO 2 hydrogenation to CH 4 . Herein, we reported the selectivity of CoO x catalysts could be modulated from CH 4 to CO after modifying by MoO x , which was almost inactive in CO 2 hydrogenation. The strong interaction between CoO x and MoO x species in CoMoO x resulted in decent catalytic performance in CO 2 hydrogenation to CO, with the highest CO 2 conversion of ∼38% and a high CO selectivity of ∼99%. The strong interaction between CoO x and MoO x induced the formation of rich oxygen vacancy, which promoted adsorption of CO 2 on oxygen vacancies neighboring MoO x , while H 2 was activated in CoO x sites. Compared with CoO x and MoO x , bicarbonate species were detected during the in situ CO 2 hydrogenation to CO. This work illustrated the critical role of synergistic effect in tuning the selectivity in CO 2 hydrogenation.
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Science China-Chemistry
·
2026
·
IF 9.7
Xiao Chenwei,Xu Xiaocheng,Tian Zhenjiang,Xiao Chengliang
The rapid development of nuclear energy necessitates reliable radioactive waste forms to ensure sustainable nuclear industry growth. Conventional cement or glass matrices face critical limitations, including insufficient chemical durability and low radionuclide loading. Inorganic ionic co-crosslinking polymerization is a novel method to produce compact inorganic materials, which can achieve plastic preparation of inorganic blocks at the molecular scale and has not yet been used to immobilize radionuclides. This study utilizes calcium carbonate phosphate compounds (referred to as CaCP) with molecular homogeneity, synthesized through a controlled crosslinking polymerization method utilizing inorganic ion oligomers to immobilize cationic radionuclides for the first time, such as representative strontium, europium, and uranium. CaCP is compared with calcite and hydroxyapatite waste forms synthesized through the same method. The results demonstrate that CaCP exhibits superior chemical stability, mechanical strength, and cost-effectiveness. The normalized leaching rates for strontium, europium, and uranium are recorded at 1.33×10 −6 , 4.89×10 −10 , and 3.05×10 −9 g m −2 d −1 , respectively. Structural characterization elucidates the immobilization mechanism and demonstrates the CaCP’s high immobilization efficiency and enhanced properties, while theoretical calculations further support the structural insights. This work highlights the potential of CaCP as a promising candidate for advanced radioactive waste management.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Fengkai Shang,Cuijian Zhao,SuJun Cheng,Tianheng Zhang,Lusu Li,Shujie Liu,JunLi Fang,YiHang Li,Xiaoting Hao
The photocatalytic reduction of CO 2 with H 2 O is a promising route for solar-to-chemical energy conversion but remains limited by the inertness of CO 2 and poor product selectivity. Here, we construct a Mn-OVs-Ti asymmetric heterostructure by integrating oxygen-vacancy-rich MnO 2 nanosheets with TiO 2 nanoparticles to modulate interfacial charge distribution. The resulting built-in electric field enhances CO 2 adsorption, stabilizes the COOH* intermediate, and promotes directional charge migration. As a result, the 50-MT catalyst delivers a CO evolution rate of 177.71 μmol g −1 within 5 h with nearly 100 % selectivity in pure water under simulated sunlight. In situ DRIFTS, EPR, and DFT analyses confirm the strengthened CO 2 activation and lowered reaction barriers at the Mn-OVs-Ti interface. This work demonstrates the effectiveness of asymmetric interfacial engineering in tuning photoredox pathways and provides a general strategy for developing efficient and selective CO 2 reduction photocatalysts.
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