Biomass Conversion and Biorefinery
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2022
·
IF 4.05
Qu Qiang,Guo Xiaohui,Shao Zhijiang,Wang Xiuzhang,Zhu Mingqiang,Qiu Ling
Zanthoxylum branch became agricultural waste without proper utilization, and the pristine biochar (PB) had the limited removal capacity of Cr(VI) (21.75 mg g −1 ). In this study, zanthoxylum branch was fabricated to modified biochar (MZB) through impregnating with 0.4, 0.6, 0.8, and 1.0 mol L −1 Fe (NO 3 ) 3 solution and then pyrolyzing at 500 and 900 ℃. After sieving by batch adsorption experiment of Cr(VI), the optimal MZB was prepared with impregnating solution concentration of 0.4 mg L −1 and pyrolysis temperature of 900 ℃ (900MZB4), and displayed the outstanding Cr(VI) removal capacity (110.43 mg g −1 ). Besides, the effect of initial solution pH was evaluated, and removal process of Cr(VI) was a reaction of consuming protons. The fitting results of Langmuir model and pseudo-second-order kinetic model confirmed that the Cr(VI) removal reaction was a homogeneous chemisorption. Thermodynamic parameters demonstrated that the adsorption of Cr(VI) was an endothermic spontaneous process. The results of SEM and XRD suggested that zero-valent iron (Fe 0 ) particles were located on 900MZB4 surface and participated in the removal reaction of Cr(VI). The XPS analysis indicated 78.37% of Cr(VI) was reduced to Cr(III) by the cooperation of oxygen-containing functional groups (OFG) and Fe 0 . More OFG and higher surface area (130.36 m 2 g −1 ) revealed by FTIR and BET also contributed to the better characteristic of 900MZB4. In addition, 900MZB4 maintained removal efficiency at 81.22% after sixth regeneration cycles. Therefore, it is feasible to prepare high-efficient adsorbent from zanthoxylum branch for wastewater treatment. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 28
·13527-13540
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IF 4.682
Chen Dongli,Zhu Ming,Zhan Wenwei,Long Lei,Yu Lu,Zhu Tao,Kang Peibin,Yang Xiaoping,Sui Gang
Abstract Lithium–sulfur (Li–S) batteries have been considered as a promising substitute for lithium-ion batteries because of their high theoretical specific capacity, low cost, and environmental friendliness. However, the further practical application of Li–S batteries is greatly limited by the intrinsic insulation of sulfur, the shuttle effects of polysulfides and sluggish kinetics of the redox reaction. Herein, a well-designed Fe, N co-doped mesoporous carbon sphere (Fe-N-MCS) was fabricated to modify separator for absorbing and reutilizing polysulfides in high-performance Li–S batteries using cost-effective S cathode. The obtained Fe-N-MCS was not only acted as a physical barrier layer to block polysulfides, but also as trapper to capture and anchor polysulfides due to its highly porous structure and N dopants in the carbon frameworks. Furthermore, the high-conductive Fe-N-MCS barrier layer can facilitate electron and ion transfer to improve the electrochemical reutilization of polysulfide trapped therein, because the Fe-N-MCSs exhibited high catalytic activity for enormously boosting the redox kinetics of polysulfides. In consequence, the Li–S batteries with Fe-N-MCS modified separator exhibited high reversible capacity, superior rate capability and impressively cycling stability. The construction of non-precious metal barrier layer with catalyst activity is a promising pathway for the development of high-energy–density Li–S batteries. Graphical abstract The polysulfides were anchored and reutilized by the Fe-N-MCS layer for high-performance lithium sulfur battery.
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CHEMOSPHERE
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2022
·
IF 8.943
Lu Zheng,Yifan Gu,Baolv Hua,Jiarui Fu,Fengting Li
Metal-organic frameworks have been investigated in Fenton-like catalysis for tetracycline hydrochloride degradation, a widely used antibiotic which threatens the growth and health of creatures. However, powder phase and absence of large pores limit the materials’ degradation performance and application. In this work, a hierarchical macro-meso-microporous composite melamine sponge@MIL-101-Fe-NH 2 was firstly designed and constructed. While the micropores provided plenty of active sites to generate reactive oxygen species , the macropores and mesopores accelerated mass transfer. Besides, MIL-101-Fe-NH 2 particles dispersed on melamine sponge individually, exposing more catalytic sites and avoiding inactivation caused by aggregation compared to powder catalysts. Its catalysis performance for tetracycline hydrochloride degradation was evaluated through changing various influence factors like H 2 O 2 concentration, catalyst amount, pH and coexisting ions. Different from the preference of homogenous Fenton catalysts for pH 2–4, the composite displayed the most effective degradation at a subacid environment closer to nature with 77.24% in 30 min. Owing to the synergistic effect of hierarchical porous structure and monodispersed nanoparticles , the composite exhibited faster reaction rate and longer persistence compared to powder MIL-101-Fe-NH 2 . Easy recycling and less ion leaching made it advantages for practical application. •OH, •O 2 − and 1 O 2 active species contributed together to the degradation and two main possible degradation pathways were put forward based on 35 detected intermediates.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Honggang Zhang,Guangyao Zhai,Longfei Lei,Caiyun Zhang,Yuanyuan Liu,Zeyan Wang,Hefeng Cheng,Zhaoke Zheng,Peng Wang,Ying Dai,Baibiao Huang
It is crucial to design and synthesize a catalyst that can catalyze the production of cyclic carbonates from CO 2 and epoxide under mild conditions. Herein, we successfully synthesized a two-dimensional metal organic framework FeTPyP, which displays an outstanding capability to catalyze the CO 2 cycloaddition reaction under light irradiation with a yield of styrene carbonate as high as 106.13 mmol/(g h). Characterizations suggests that the major reason is due to (1) the synergistic effect between photocatalysis and thermocatalysis and (2) ultraviolet light can promote the ring-opening reaction of styrene oxide. This work provides an alternative approach to further design efficient heterogeneous catalysts for photo-induced CO 2 cycloaddition reaction via coupling thermocatalysis and photocatalysis.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Siqi Chen,Tingting Li,Donglian Deng,Yibing Ji,Ruijun Li
This work innovatively integrated the peroxidase-mimicking activity and red emission property of Fe@PCN-222 framework, designed a cascade reaction system for dual-mode glucose sensing. The Fe 3+ doping significantly improved the catalytic activity of Fe@PCN-222 that can oxidize the substrate o -phenylenediamine (OPD) to generate diminophenazine (DAP) with emission at 566 nm in the presence of H 2 O 2 . Similarly, the Fe@PCN-222 was used to catalyze the colorless TMB to produce blue oxidized TMB (oxTMB) showed absorption at 652 nm. When coupled with glucose oxidase (GOx), the linear ranges of ratiometric fluorescence mode and colorimetric mode for glucose sensing were 1–100 and 10–300 μM, respectively. And the limits of detection (LOD) of 0.78 and 2.41 μM for two modes were obtained, respectively. In addition, the practicability of Fe@PCN-222 nanozyme-based cascade reaction system for detection of glucose in human serum and saliva samples was successfully investigated. It is of great importance to integrate more functions into one skeleton to achieve dual-mode and optimal-performance sensing for expanding potential applications.
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高影响因子
Water
·
2022
·Vol. 14
·期 11
·1726
·
IF 3.53
Xiao Liu,Renglu Chen,Zijing Wang,Wei Lin,Rourou Zhang,Shengping Yu,An Ding
The secondary effluent of the wastewater treatment plant is considered as one of the reused water sources and needs advanced treatment to meet increasingly stringent water treatment standards. Ultrafiltration, as one of the most widely used advanced treatment technologies, is limited due to membrane fouling, and coagulation and pre-oxidation have received extensive attention as pretreatment methods to alleviate membrane fouling. This research proposes a new method of Fe(II)-activated peroxymonosulfate (PMS) coagulation and a pre-oxidation system coupled with ultrafiltration (UF) to treat secondary effluent from sewage plants, separately evaluating the treatment effect under different molar ratios of Fe(II)/PMS. The Fe(II)/PMS decontamination mechanism and membrane fouling control effect were elucidated through pollutant removal efficiency, membrane morphology, membrane flux trend, and membrane fouling resistance distribution. According to the experimental results, the optimal effect of organic matter removal and membrane fouling mitigation was achieved at the Fe(II)/PMS dosage of 60/60 μM/μM (molar ratio 1:1). The efficiency of pretreatment methods in removing organics and fluorescent components and mitigating membrane fouling followed the order of Fe(II)/PMS > Fe(III) > inactivated PMS. Fe(II)/PMS could produce a synergistic effect in a high concentration state (60 μM), relying on the dual effects of coagulation and oxidation to alleviate membrane fouling. Coagulation and pre-oxidation by Fe(II)/PMS significantly reduced the clogging of membrane pores and the proportion of irreversible resistance, effectively controlling membrane fouling and improving effluent quality. SEM images further confirmed its effectiveness, and EPR results unequivocally indicated that its synergistic mechanism was mediated by •OH and SO4•−. The research results can provide ideas for advanced wastewater treatment and secondary effluent reuse.Keywords:ultrafiltration;membrane fouling;coagulation;pre-oxidation;ferrous-activated peroxymonosulfate;secondary effluent
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高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 14
·e202200161
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IF 4.839
Bo Ling,Yaguang Wang,Ruo Mi,Di Wang,Hongqi Chen,Xiaohu Li,Ye Zhang,Lun Wang
Graphical NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles coated with Fe−TCPP metal-organic frameworks nanocomposite was designed and constructed for multimodal imaging and synergetic chemodynamic therapy/photodynamic therapy of tumors. Here, NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles (UCNPs) coated with Fe−Tetrakis (4-carboxyphenyl) porphine (TCPP) metal-organic frameworks (Fe-MOFs) nanocomposite (UCNPs@MOFs) was designed and constructed for multimodal imaging and synergetic chemodynamic therapy (CDT)/photodynamic therapy (PDT) of tumors. The UCNPs@MOFs were successfully applied for tumor cells imaging in vitro and in vivo in near-infrared (NIR) region. The doped Gd was used as contrast agent for the magnetic resonance imaging (MRI) of mouse tumors. The luminescence in the UV-vis region was absorbed by the Fe-MOFs to produce singlet oxygen ( 1 O 2 ) for PDT. The Fe 3+ doped in the MOFs can catalyze H 2 O 2 to produce oxygen and hydroxyl radical (⋅OH). Hydroxyl radical is used in CDT and cooperates with the 1 O 2 of PDT. Based on the CDT/PDT synergistic effects, the UCNPs@MOFs nanocomposite had obviously enhanced tumor inhibitory efficiency in vivo. These results described that the asprared UCNPs@MOFs nanocomposite have great potential in the effective multimodal imaging and treatment of tumors.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Chengzhi Sun,Yu Kong,Yongchao Niu,Xiaoju Yin,Naiqing Zhang
The mixed ionic and electronic conductor (MIEC), as a classical family of high-performance cathode materials, is essential for ensuring the low-temperature operation performance and high efficiency of solid oxide fuel cells. The Fe-based double perovskites get the advantages of low cost, good thermal compatibility with the electrolyte, and good high-temperature stability, showing good application promise. However, due to the unsatisfactory electrochemical properties, Fe-based double perovskite MIECs are generally not sufficiently active for the oxygen reduction reaction. Herein, the consequences indicate that Zr-substitution of the Fe sites in the NdBaFe2O6-δ(NBF) lattice can obtain a higher oxygen vacancy concentration and a more high-lying position of the O p-band center simultaneously. Then, the Zr-doped NBF cathode obtains a higher oxygen-ion diffusion and oxygen surface exchange coefficients. The lower polarization resistance for NdBaFe1.9Zr0.1O6-δmeasured at 700 °C is 0.066 Ω·cm2 compared to 0.104 Ω·cm2 for NBF.
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高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 17
·3311-3319
·
IF 7.571
Rui Li,Xiaohong Qiao,Huijun Ma,Hanmei Li,Cong Li,Lihua Jin
In this work, we reported new Fe3C embedded Fe–N-doped carbon nanomaterials (Fe3C@Fe–N-CMs) generated in situ by the facile pyrolysis of Fe–Zn ZIF precursors. The resulting Fe3C@Fe–N-CMs were equipped with several desirable nanozyme features, including multiple efficient intrinsic active sites (i.e. Fe–Nx, Fe3C@C, and C–N moieties), large specific surface area and abundant mesoporous structures. As a result, these Fe3C@Fe–N-CMs displayed exceptional ability to mimic three enzymes: peroxidase, catalase and oxidase, while the Fe3C@Fe–N-CMs pyrolyzed at 800 °C, named CMs-800, showed the best enzyme-like properties. After systematically investigating the catalytic mechanism, we further explored the application of the oxidase-like properties of CMs-800 in the detection of the total antioxidant capacity (TAC) in beverages and tablets. This study not only provided a new approach to construct multifunctional carbon-based nanozymes, but also expanded the application of carbon nanozymes in the field of food quality and safety.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 17
·13956-13967
·
IF 2.779
Sun Haibo,Zhou Guohua,Guo Zhili,Wang Ce,Wang Jinghui,Zong Changbao
The high-quality TiO 2 insulating layer on the commercial gas-atomized FeSiAl powder surface was efficiently prepared within a total time of 1 h at room temperature via a one-pot sol–gel method based on a developed industry-oriented coating equipment. The core-shell structure for the chemically coated FeSiAl powders was detected by the joint tools of SEM, EDS, and FTIR. Combined with the establishment of loss separation fitting model, the regulation mechanism analysis on soft magnetic properties was carried out for the FeSiAl powder cores insulated with different TiO 2 coating amounts. It is found that the interface-pinning effect, which is closely related to the core’s density, is an important factor affecting the magnetic properties of powder cores. With the elevating TiO 2 coating amount, the hysteresis loss, the excess loss, and DC-bias property of the core specimen exhibit the same increasing tendency, while the real part of complex permeability at 100 kHz gradually decreases owing to the increase of non-magnetic gap between the particles in the core, which can impede the domain-wall motion during magnetization. Correspondingly, the eddy current loss persistently decreases and contributes only 18.7% ~ 21.6% of total core loss when the precursor concentration is over 0.08 ml/g due to the formation of the intergranular insulated structure blocking the inter-particle eddy current flows in the composites. These results offer insights into subtly regulating magnetic properties when the adjusting process parameters for the soft magnetic composites are used in high-power and high-frequency applications.
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JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2022
·Vol. 55
·期 23
·234002
·
IF 3.409
Lijuan Hou,Limin Zhang,Jinhao Zang,Weixia Shen,Taiyi Zhang,Xiaowen Huang,Huiyu Yuan,Dezhi Kong,Ye Wang,Xinjian Li,Tingting Xu
K0.8Ti1.73Li0.27O4 (KLTO) is an important titanium-based anode material for lithium-ion batteries (LIBs) and is expected to become an alternative to carbonaceous materials on account of its nontoxicity, low cost, and high safety performance. However, it suffers from poor specific capacity at high charge–discharge rates due to its low conductivity and obstructed Li-ion diffusion. In this work, an Fe-doped KLTO@rGO (Fe-KLTO@rGO) composite prepared by following a simple electrostatic assembly process and its high-rate and long-cycle-life-performance as an anode in LIBs is obtained. The Fe-KLTO@rGO composite sample has an excellent specific capacity of 330 and 105 mAh g−1 at a current density of 1 C (1 C = 175 mA g−1) and 50 C, respectively. In addition, the Fe-KLTO@rGO composite sample can carry out a long cycle of 3000 cycles at a rate of 50 C, and the specific capacity remains at 127 mAh g−1.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hui Xia,Jungang Guo,Yuesuo Yang,Yuanyuan Wang,Zhongchang Wang,Xin Wang,Wenjing Zhang
Calcium peroxide (CP, CaO 2 ), acting as a source of H 2 O 2 , was combined with Fe(II) to provide a novel modified Fenton system. The removal of p- nitrophenol (PNP) in groundwater as a model pollutant was investigated using this system while addressing effect of reagents on water quality, mechanism of reactive oxygen species formation, possible degradation pathways, impact of geochemistry and process parameters on the removal efficiency. The dissolved oxygen, oxidation-reduction potential, pH, electrical conductivity and H 2 O 2 concentration in groundwater were all increased significantly due to the addition of CaO 2 and Fe(II), especially in the early stage and under acidic conditions. Within 30 min, 96% of an initial 40 mg/L PNP contamination was removed using the optimum conditions, consisting of 250 mg/L CaO 2 , 50 mg/L Fe(II), an initial pH of 2.6, oscillation frequency of 170 rpm and temperature of 298 K. The batch experiments revealed that the initial pH and the Fe(II) and CaO 2 concentrations all decisively affected removal efficiency, while the groundwater dynamics, temperature and illumination conditions had little effect. The presence of hydroxyl radicals (∙OH) and singlet oxygen ( 1 O 2 ) was confirmed by electron paramagnetic resonance spectroscopy. In addition, ∙OH quenching experiments indicated that the former rather than the latter played a major role in PNP removal. The generation of 1 O 2 in this system was also predicted by classical molecular orbital theory. These findings would provide useful technical support for the remediation of groundwater contamination .
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