INDUSTRIAL CROPS AND PRODUCTS
·
2023
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IF 5.9
Qi Gao,Yuyu He,Liangmeng Ni,Hao Ren,Mengfu Su,Shaowen Rong,Zhijia Liu
Fe-N-modified activated carbons (ACs) were prepared from bamboo shoot shells (BSS) by potassium ferrate activation for arsenic adsorption. BSS provided abundant nitrogen and carbon sources for ACs, while potassium ferrate significantly improved the pore volume and specific surface area (SSA), but also loaded iron particles. The highest SSA of AC was 1900 m 2 /g, with the iron content of 4.54–6.52% and nitrogen content of 2.88–3.35%. Based on the arsenic adsorption capacity, the optimized manufacturing process was activation temperature of 800 °C, activation time of 120 min, and activator ratio of 3.5. The optimized AC exhibited excellent arsenic adsorption performance and the maximum adsorption capacity was 9.18 mg/g. The good magnetism of AC was beneficial to recovery and reuse. The adsorption capability retention was still more than 50% after reusing for five times. This work showed that BSS had great potential for commercial development, and also provided a cost-effective production way for arsenic adsorbents.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shihui Zhang,Chang-an Zhou,Shenghong Wang,Zhifeng Qin,Guoqiang Shu,Chao Wang,Lei Song,Lirong Zheng,Xiaoyang Wei,Kui Ma,Hairong Yue
Selective oxidative dehydrogenation of propane with CO 2 (CO 2 -ODP) represents a promising pathway of propylene production and CO 2 utilization. Presently, vanadium (V) based catalysts are commonly used due to the excellent redox ability originated from the multivalent V. However, the CO 2 -ODP reaction mechanism remains elusive, limiting the rational design of highly efficient catalytic systems. Herein, we introduced Fe into impregnated V-Al 2 O 3 to build a dual-sites catalyst including Fe and V, achieving a C 3 H 8 conversion at ∼43 % and C 3 H 6 selectivity exceed 80 %. Via regulating the Fe/V molar ratio, we clearly describe that the formation of unique Fe-O-V facilitated the CO 2 dissociation. Intrinsically, V is the main active site contributing for C 3 H 8 dehydrogenation while Fe site is responsible for the CO 2 dissociation, replenishing lattice oxygen to enhance oxidative dehydrogenation of C 3 H 8 . The design of dual-sites catalyst and extraction of molecular understanding provide guidance for the rational development of highly active CO 2 -ODP catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yunjiang Yu,Zheng Huang,Dongyang Deng,Yongming Ju,Luyao Ren,Mingdeng Xiang,Liangzhong Li,Hui Li
Tetrabromobisphenol A (TBBPA) was a potential persistent organic pollutants. This study synthesized s-Fe/Cu bimetallic particles by decorated sponge iron (s-Fe) with Copper (Cu) to degrade TBBPA. S-Fe/Cu bimetallic particles was further characterized by XRD, XPS, SEM and EDS. The optimal TBBPA removal efficiency was 95.9%. Among the theoretical Cu mass loading increasing from 0 wt% to 6 wt%, 4 wt% mass loading was the best; with TBBPA initial concentration increased from 5 mg/L to 30 mg/L, TBBPA removal efficiency decreased from 91.2% to 73.0%; also, when dosage increased from 10 g/L to 30 g/L, removal efficiency increased from 58.1% to 95.9%; pH 6.5 were beneficial to degrading TBBPA and the s-Fe/Cu bimetallic particles showed strong catalytic ability after 4 reuse cycle. Kinetic analysis showed that the degradation of TBBPA obeyed pseudo-first-order kinetics. In addition, Liquid Chromatography Time-of-Flight Mass Spectrometry (LC/TOF/MS) detected degradation products including debromination products, hydroxylation products, single aromatic ring products and O -methylating product, which demonstrated that the main degradation pathway were debromination, hydroxyl, β -scission and O -methylation reactions.
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RARE METALS
·
2020
·Vol. 40
·期 7
·1957-1965
·
IF 2.161
Xu Yin-Long,Mo Rui-Xue,Qi Cai-Yu,Ren Zeng,Jia Xiu-Zhi,Kan Zi-Gui,Li Cao-Long,Wang Fei
Abstract The excitation wavelength-dependent and -independent emissions are two crucial fluorescent properties of carbon dots (CDs). However, CDs reported till date exhibit only one of these properties, which limits their practical applications. Herein, dual-property carbon dots (DCDs) with both the excitation wavelength-dependent and -independent emissions were synthesized via a facile one-step solvothermal method using 4-(2-pyridylazo)-resorcinol as the carbon precursor. The multi-functional applications of the resulting DCDs were also evaluated. The as-prepared DCDs exhibited not only excellent monodispersity, high photostability, and storage stability, but also low toxicity, good biocompatibility, and cellular bioimaging capability. In addition, the DCDs exhibited excitation-dependent emission photoluminescence under low excitation wavelengths. The DCDs exhibited good Fe 3+ detection by quenching the blue emission fluorescence and showed a relatively low Fe 3+ detection limit of 0.067 μmol·L −1 based on three times signal-to-noise criteria ( R 2 = 0.99). Furthermore, the DCDs showed excitation-independent emission at low excitation wavelengths and exhibited red emission at about 598 nm to avoid damage to the body. These results demonstrate the excellent bioimaging properties of the DCDs. Owing to their dual PL properties, the as-prepared DCDs exhibited multi-functional applications: Fe 3+ detection and A549 cell bioimaging. These results will be helpful in developing novel CDs for applications in various fields. Graphic abstract
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125180
·
IF 7.5
Lin Xu,Lifen Liu,Yan Li
An aeration-driven piezocatalytic fuel cell (PzFC) was tested for sulfide removal. • Single-atom Fe-doped MoS 2 piezoanode enhanced the oxidation of sulfide. • The PzFC achieved sulfide removal of 2.53 kg/(m 3 ·d) with 83% selectivity of S 0 /S n 2- . Sulfide (S 2- , HS - , and H 2 S) can be directly oxidized by air, but the reaction kinetics are sluggish, and the resulting sulfate product is stable but of low value. To accelerate sulfide oxidation to recoverable value-added products, we constructed an aeration-driven piezocatalytic fuel cell (PzFC) with single-atom Fe 1 @MoS 2 catalysts, in which mechanical strain was induced by continuous air bubbling. Herein, the sulfide was oxidized and selectively converted to low-toxicity products: about 83% elemental sulfur/polysulfides (S 0 /S n 2- ), with minor soluble sulfate (SO 4 2- ) and thiosulfate (S 2 O 3 2- ). S 0 /S n 2- can be used to enhance biological denitrification in wastewater treatment. Notably, the PzFC achieved 93% sulfide removal (initial concentration: 170 mg/L) within 90 min and exhibited stability over six consecutive cycles. Key operational parameters (temperature, pH, initial sulfide concentration, and aeration rate) were systematically evaluated, achieving a maximum desulfurization capacity of 20.68 g/(m 2 ·h) (i.e., 4.96 kg/(m 3 ·d) at an initial concentration of 470 mg/L). Furthermore, the influences of self-bias and single-atom Fe loading on PzFC performance were systematically clarified, and the underlying catalytic mechanism was proposed. This work establishes a low-carbon, efficient strategy for wastewater desulfurization by integrating single-atom piezocatalysts Fe 1 @MoS 2 and PzFC. Download: Download high-res image (240KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mingyue Zhou,Ziwei Yang,Tianpeng Yin,Yunfeng Zhao,Cai-yun Wang,Guo-yuan Zhu,Li-ping Bai,Zhi-hong Jiang,Wei Zhang
Nonapoptotic ferroptosis is a promising cancer treatment which offers a solution to the multidrug resistance of conventional apoptosis-induced programmed cancer cell death therapies. Reducing intracellular glutathione (GSH) is essential for inducing excess ROS and has been considered a crucial process to trigger ferroptosis. However, treatments reducing GSH alone have not produced satisfactory effects due to their restricted target. In this regard, FeCDs (Fe3+-modified l-histidine -sourced carbon dots) with dual GSH-consumption capabilities were constructed to engineer ferroptosis by self-amplifying intratumoral oxidative stress. Carbon dots have the ability to consume GSH, and the introduction of Fe3+ can amplify the GSH-consuming ability of CDs, reacting with excess H2O2 in the tumor microenvironment to generate highly oxidized •OH. This is a novel strategy through synergistic self-amplification therapy combining Fe3+ and CDs with GSH-consuming activity. The acid-triggered degradation material (FeCDs@PAE–PEG) was prepared by encapsulating FeCDs in an oil-in-water manner. Compared with other ferroptosis-triggering nanoparticles, the established FeCDs@PAE–PEG is targeted and significantly enhances the consumption efficiency of GSH and accumulation of excess iron without the involvement of infrared light and ultrasound. This synergistic strategy exhibits excellent ferroptosis-inducing ability and antitumor efficacy both in vitro and in vivo and offers great potential for clinical translation of ferroptosis.
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ENERGY & FUELS
·
2023
·
IF 5.3
Huihua Wang,Wenchang Li,Jinhong Wu,Deyong Wang,Dong Hou,Minqi Sheng,Ruiqi Guo
Water splitting through electrolysis has been recognized as a promising solution for the production of hydrogen and oxygen to advance many renewable energy conversion and storage systems, while the key is the innovative exploration of cost-efficient electrocatalysts. Herein, interface-modified Ni–Fe–P/Co–P/NF alloys were achieved through a facile electroless plating strategy, in which the constructed interfaces benefited not only from the strong electron interaction but also from the fast mass transfer, significantly boosting the oxygen evolution reaction and hydrogen evolution reaction catalytic performance. More interestingly, water-splitting cells assembled using Ni–Fe–P/Co–P/NF-5L alloys as the cathode and anode, respectively, only requires a cell voltage of ∼1.52 V at 10 mA cm–2, far lower than that of the integrated Pt–C/NF and RuO2/NF couple (1.61 V). Also, the Ni–Fe–P/Co–P/NF-5L||Ni–Fe–P/Co–P/NF-5L system shows an outstanding durability over a long-term operation of 48 h at 10 mA cm–2. The work demonstrates an innovative strategy to construct heterogeneous interfaces for high-performance electrocatalysts and is suggested to be readily extended to regulate heterogeneous interfaces among other binary and ternary electrocatalysts, such as transition metal phosphides/borides, for scaling up water-splitting technology.
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高影响因子
Journal of Materials Chemistry B
·
2023
·
IF 7
Mengmeng Zhang,Tianze Wu,Hui Zhang,Zhenxia Chen,Yannan Yang,Yun Ling,Yaming Zhou
Asymmetric carbon has emerged as an important material to enrich morphologies as well as enhance functions for bioapplications. Here, asymmetric mesoporous carbon hemispheres (CHS) integrated with γ-Fe2O3 and GdPO4 (Fe–Gd) nanoparticles are proposed and prepared for potential imaging-guided photothermal therapy (PTT). Interestingly, Fe–Gd/CHS contributes to an almost 1.5 times enhancement in light harvesting and photothermal conversion efficiency as compared with its corresponding spherical analogue. The possible underlying mechanism is discussed in view of the unique asymmetric structure-featured carbon. Further identification of the inherited photoacoustic (PA) and magnetic resonance (MR) imaging properties leads to the consequent in vivo evaluation of its imaging and PTT performances, which demonstrates its capability as a function-integrated system for potential theranostics.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·
IF 3.4
Xiaodong Jin,Xinyi Wu,Qinyong Liu,Shibing Sun,Suping Cui,Sheng Zhang,Chen Chen
In this work, a metal organic framework (Fe-MOF) with the effect of absorbing toxic gases and good compatibility was synthesized by chelating a novel organic ligand contained carbonization groups (reacted by tris(hydroxymethyl) aminomethane and 1,4-piperazine dialdehyde) with iron salt. Then, it was used as the synergist to improve the efficiency of intumescent flame retardant (IFR) within polystyrene (PS) substrate. With the addition of 20% IFR and 2% Fe-MOF, the obtained PS composites exhibited a limiting oxygen index (LOI) value of 28.3% and a UL rating of V-0. Moreover, the peak heat release rate (pHRR), total heat release (THR), and total smoke production (TSP) of PS composites were decreased by 77.6%, 35.2%, and 33.7%, respectively. According to the mechanism analysis, it was found that Fe-MOF mainly acted in the condensed phase, contributing to the existence of dense char residues with the presence of IFR system. In addition, the good compatibility of organic ligand in Fe-MOF with PS substrate could partially alleviate the deterioration of mechanical properties due to the addition of IFR. For PS-20%IFR/2%Fe-MOF, the impact strength was improved from 1.7 kJ/m 2 (PS-22%IFR) to 2.2 kJ/m 2 , the tensile strength was also increased from 21.3 MPa (PS-22%IFR) to 22.4 MPa.
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Water
·
2023
·Vol. 15
·期 21
·3801
·
IF 3.4
Yaoji Chen,Ruifu Chen,Xinglan Chang,Jingying Yan,Yajie Gu,Shuang Xi,Pengfei Sun,Xiaoping Dong
In order to realize the high value-added reuse of coal fly ash, a reusable Fe-modified fly ash catalyst was synthesized for ozone catalysis degradation of chemical oxygen demand (COD) in wastewater. Through enhancement of the pretreatment procedure and FeOxmodification, the resulting fly ash with Fe modification demonstrated increased specific surface area and porosity. The presence of Fe loading significantly enhances the reactivity of surface oxidizing reactive species, particularly oxygen vacancy, leading to improved adsorption and activation properties towards ozone molecules. Sodium acetate is chosen as a probe for contaminants due to its status as a small organic substance that remains resistant to further direct oxidation by ozone. This makes it suitable for evaluating the catalyst’s effectiveness in degrading chemical oxygen demand (COD). The quantitative detection of free radicals revealed the generation of •O2−was nearly 10 times that of •OH and dominated the reaction. This study showcases the potential of fly ash, an industrial byproduct, to be utilized as a cost-effective and easily prepared catalyst with consistent physical and chemical characteristics.Keywords:coal fly ash catalyst;iron oxide;ozone catalysis;radical oxidation;COD degradation
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高影响因子
Theranostics
·
2023
·
IF 12.4
Wenjie Feng,Wanrui Shi,Yanqi Cui,Jiajun Xu,Shuwei Liu,Hang Gao,Shoujun Zhu,Yi Liu,Hao Zhang
Immunoadjuvants, as an indispensable component of tumor vaccines, can observably enhance the magnitude, breadth, and durability of antitumor immunity. However, current immunoadjuvants suffer from different issues such as weak immunogenicity, inadequate cellular internalization, poor circulation time, and mono-functional bioactivity. Methods: Herein, we construct Fe 3+ -Shikonin metal-phenolic networks (FeShik) nanomedicines as immunogenic cell death (ICD) stimulants and multifunctional immunoadjuvants for tumor vaccination. The multifunctionality of FeShik nanomedicines is investigated by loading ovalbumin (OVA) as the model antigen to construct OVA@FeShik nanovaccines or 4T1 tumor cell fragment (TF) as homologous antigen to construct TF@FeShik nanovaccines. In vitro examinations including GSH responsive, •OH generation, colloid stability, cellular uptake, cytotoxicity mechanism of ferroptosis and necroptosis, ICD effect, the promotion of DC maturation and antigen cross-presentation were studied. In vivo observations including pharmacokinetics and biodistribution, antitumor effect, abscopal effect, immune memory effect, and biosafety were performed. Results: The presence of FeShik nanomedicines can significantly prolong the blood circulation time of antigens, increasing the bioavailability of antigens. Upon phagocytosis by tumor cells, FeShik nanomedicines can disassemble into Fe 2+ and Shikonin in response to tumor microenvironments, leading to ICD of tumor cells via ferroptosis and necroptosis. Consequently, ICD-released autologous tumor cell lysates and pro-inflammatory cytokines not only stimulate DC maturation and antigen cross-presentation, but also promote macrophage repolarization and cytotoxic T lymphocyte infiltration, resulting in the activation of adaptive immune responses toward solid tumors. Conclusion: In a word, our FeShik supramolecular nanomedicines integrate bioactivities of ICD stimulants and immunoadjuvants, such as eradicating tumor cells, activating antitumor immune responses, modulating immunosuppressive tumor microenvironments, and biodegradation after immunotherapy. Encouraged by the diversity of polyphenols and metal ions, our research may provide a valuable paradigm to establish a large library for tumor vaccination.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Feilong Dong,Chuyun Fu,Zhu Meng,Qiufeng Lin,Jinzhe Li,Tao Zeng,Da Wang,Juntao Tang,Shuang Song
Ferrate (Fe(VI)) has been extensively studied as a green oxidant to treat wastewater. But Fe(VI) oxidation still faces several challenges for application, such as the sensitivity of Fe(VI) to pH and the restrictions on the Fe(VI) utilization efficiency for pollutant elimination at low concentration levels. This study proposed a two-stage Fe(VI) oxidation process to enhance the bisphenol A (BPA) removal for potential applicability, consisting of the adsorption by CNTs of stage I and the degradation by Fe(VI) of stage II. The Fe(VI) utilization efficiency in the two-stage process (0.848) was higher than that in one-stage processes (0.727) and Fe(VI) alone system (0.504) at pH 9. In stage I, the adsorption process had good compliance with the Langmuir isotherm model and pseudo-second-order kinetic model. In stage II, the effective utilization of low-concentration Fe(VI) was 2.45 times more than Fe(VI) alone, and the reduction of reaction volume was beneficial to further enhance utilization. The probe experiments (sulfoxide) and the degradation experiments of other electron-donating/withdrawing pollutants (e.g., atrazine, benzoic acid) demonstrated that Fe(IV) and Fe(V) were major oxidizing species in the two-stage process. The regeneration experiments showed that CNTs still had acceptable adsorption and catalytic capabilities after five cycles. Finally, the intermediate products in the two-stage process were detected and four possible degradation pathways of BPA were proposed. These findings were meaningful for the practical application of Fe(VI) oxidation to overcome the conditional limitation and improve the utilization.
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