Chemistry-An Asian Journal
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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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JOURNAL OF PHYSICS D-APPLIED PHYSICS
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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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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Chaoqun Tan,Wangqi Yu,Hong Mei,Kaiyang Chen,Tianhui Xu,Huiming Xiang,Yiming Feng,Lin Deng
In this study, Fe(III) catalyzed calcium peroxide (CaO 2 , CP) Fenton-like process assisted by crystal boron (C-boron) was applied for in situ chemical oxidation. Flunixin meglumine (FMME), aspirin (ASA), nitrobenzene (NB) and benzoic acid (BA) were selected as target contaminants. Pollutants decomposition by the CP/Fe(III) and C-boron/CP/Fe(III) systems was proposed in terms of diverse parameters, including C-boron dosage, pH, and temperature, with regard to the pseudo-first-order kinetic model (R 2 > 0.95). About 26.8% of 20 μM FMME was removed by 0.5 mM CP and 0.5 mM Fe(III) after 20 min at pH 4.0, whereas 90.4% of FMME was decomposed in the C-boron/CP/Fe(III) system with 100 mg/L C-boron. The removal rates of the other three pollutants were also improved to varying degrees. The k obs of the C-boron/CP/Fe(III) system for these four pollutants degradation at pH 4.0 was approximately 4.1 ∼ 5.3 times higher compared to the CP/Fe(III) system. Electron paramagnetic resonance and quenching experiments indicated that OH, O 2 − and 1 O 2 were present in both systems and contribution of OH was 71.3% at initial pH 4.0 in C-boron/CP/Fe(III) system, suggesting that it was the main reactive oxygen species for the contaminants elimination. Furthermore, experiments on the characterization of C-boron showed great reactivity and stability. This work manifested the promotion mechanism of pollutant degradation in the C-boron/CP/Fe(III) system.
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ACS Omega
·
2022
·
IF 4.132
Qingxiang Wang,Tao Huang,Jing Du,Lulu Zhou
The extraction of uranium (U)-related minerals from raw ore sands via a leaching procedure would produce enormous amounts of tailings, not only causing radioactivity contamination to surroundings but also wasting the potential U utilization. Effective recycling of U from U tailings is propitious to the current issues in U mining industries. In this study, the influence of the composite oxidation of Fe(III) and Mn(VII) intensified by microwave (MW) irradiation on the acid leaching of U from tailings was comprehensively explored in sequential and coupling systems. The U leaching activities from the tailing specimens were explicitly enhanced by MW irradiation. The composite oxidation caused by Fe(III) and Mn(VII) further facilitated the leaching of U ions from the tailing under MW irradiation in two systems. Maximum leaching efficiencies of 84.61, 80.56, and 92.95% for U ions were achieved in the Fe(III)-, Mn(VII)-, and Fe(III)–Mn(VII)-participated coupling systems, respectively. The inappropriateness of the shrinking core model (SCM) demonstrated by the linear fittings and analysis of variance (ANOVA) for the two systems explained a reverse increase of solid cores in the later stage of leaching experiments. The internal migration of oxidant ions into the particle cores enhanced by MW accelerated the dissolution of Al, Fe, and Mn constituents under acidic conditions, which further strengthened U extraction from tailing specimens.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Yuqing Pan,Na Li,Shiyuan Ran,Du Wen,Qinlan Luo,Ke Li,Qulan Zhou
Efforts have been devoted to exploring the effective composite catalysts for low-temperature selective catalytic reduction of NOx by CO (CO-SCR) using Fe-Cu bimetal oxide (Fe2Cu1) as the active component and rice husk ash (RHA), amorphous SiO2, and activated carbon (AC) as supports. The results showed that the beneficial role of RHA as a catalyst support for CO-SCR was primarily reliant on amorphous SiO2 in RHA and not on AC. Both Fe2Cu1/RHA and Fe2Cu1/amorphous SiO2 catalysts exhibited the best catalytic performance of CO-SCR, which had good stability, wide active temperature range, high conversion ratio, 100% N2 selectivity, and superior resistance to O2, SO2, and H2O (g). The CO and NOx conversion ratios of Fe2Cu1/amorphous SiO2 could reach up to approximately 100% from 100 to 500 °C. The excellent SCR performance was associated with the large specific surface area and good structural stability of amorphous SiO2, the uniform distribution of active sites, dual redox cycle of Fe2O3 and CuO species, and many surface-adsorbed oxygen species, which made amorphous SiO2-based catalysts highly competitive for application in the SCR process. This research provides the underlying insights for the improvement of industrial application to realize ″non-ammonia SCR″ technology with near-zero NOx/CO emissions synergistically at low temperatures.
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MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Shao-Bin He,Hui-Jing Yang,Liu Yang,Hamada A. A. Noreldeen,Hua-Ping Peng,Hao-Hua Deng,Wei Chen,Guo-Lin Hong
Coenzyme can work with a natural enzyme to achieve the enzymatic catalytic process. Inspired by nature, herein rutin was found to regulate the peroxidase-like activity of Fe-doped silicon nanodots (Fe-OSiNDs) acting as a coenzyme. To be specific, the peroxidase-like activity of Fe-OSiNDs can be activated by rutin at a low concentration (<200 µM), which accelerated the oxidation process between 3, 3′, 5, 5′-tetramethylbenzidine (TMB) and H 2 O 2 . Possibly as a reason, rutin at a low concentration could be easily attracted and oxidized by Fe 3+ in Fe-OSiNDs and then the produced Fe 2+ reacted with H 2 O 2 to form the hydroxyl radicals around the surface of Fe-OSiNDs thereby contributing to an enhancement. More interestingly, the addition of β-glucuronidase can hydrolysis rutin into quercetin and suppress the peroxidase-like activity of rutin-treated Fe-OSiNDs because quercetin is a sugar-free flavonoid with higher anti-oxidant activity than rutin. Thus, a colorimetric sensor for β-glucuronidase could be established. This sensor realizes a linear ranging from 2 to 40 nM (0.58 to 11.6 μg/mL) towards β-glucuronidase with a detection limit of 0.6 nM (0.174 μg/mL). The feasibility of this sensor for β-GUS detection in Escherichia coli has been realized. This work not only provides an interesting concept for coenzyme-dependent nanozyme and expands the promising use of silicon nanomaterials.
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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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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
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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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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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 38
·18251-18261
·
IF 3.925
Jiabao Sun,Qiang Li,Dajie Zhang,Dongsheng Xia
Oxytetracycline (OTC) is a typical antibiotic that poses a serious threat to the environment. However, traditional treatment methods suffer from low treatment efficiencies and potential secondary contamination. Therefore, there is a need to develop efficient, convenient, and environmentally friendly removal technology. In this paper, magnetic nano-Cu/Fe composites were successfully synthesized and used as the activator of peroxymonosulfate (PMS) to degrade OTC. The obtained catalysts with different ratios showed excellent degradation effects, especially the Cu/Fe-1 catalysts. The highest removal efficiency of OTC (93%) was achieved with 0.2 g L−1 PMS and 0.1 g L−1 catalyst in 60 min. The impacts of the catalyst and PMS dosages, initial temperature and pH, coexisting anions, microplastics, and real-life water samples were investigated. To explore the mechanism for OTC degradation, radical scavenging and electron spin resonance (EPR) experiments were carried out, and non-radical 1O2 was identified to be the main radical. TEM and XRD results show the presence of CuFe2O4 composites in Cu/Fe-1, which can promote the production of 1O2 and thus improve the OTC degradation efficiency. This work provides a new efficient, stable, low-cost, and environmentally friendly approach for the degradation of oxytetracycline.
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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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Analytical Methods
·
2022
·Vol. 14
·期 33
·3153-3159
·
IF 3.532
Ling Mei,Tiantian Si,Shuai Wang,Jie Zhu,Hao Tang,Xiaojing Liang
The TiO2@MOF-919(Fe–Cu) solid-phase extraction material was prepared by growing MOF-919(Fe–Cu) in situ on three-dimensional radial TiO2 microspheres by a simple solvothermal method. This combination drew on both the resources of good single dispersion and extraction rate, which made it a better extraction material. It was accompanied with high-performance liquid chromatography (SPE–HPLC) for the separation and determination of four benzoylurea pesticides (triflumuron, chlorbenzuron, teflubenzuron and diflubenzuron) in afforestation irrigation water and juice samples (grape, peach and apple juices). Under the optimal conditions, the linearity of the method ranged from 1 to 400 μg L−1 with a correlation coefficient (R2) ≥ 0.9994, while the detection limit was in the range of 0.40–0.56 μg L−1 for the four pesticides. The adopted material showed good reusability and can be used no less than 10 times. The intra-day and inter-day precision were in the range of 1.78–3.24% and 4.06–5.08%, respectively. The proposed method was then successfully applied for the detection of benzoylurea pesticides in the spiked samples with good recoveries (72.3–108.4%) and good precision (5.15%) due to π–π and hydrophobic interactions between the analytes and adsorbent. The results show that the composite had the potential to be used as a SPE adsorbent for the enrichment and extraction of benzene ring structures containing imide groups in actual samples.
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