ACS Biomaterials Science & Engineering
·
2020
·
IF 4.152
Guangchao Xie,Liang Zhang,Jinbin Pan,Xuejun Zhang,Shao-Kai Sun
Photothermal agents with good biocompatibility, high tumor accumulation efficiency, large-scale production ability, and low cost are crucial for potential photothermal treatment in clinic. Herein, we proposed a green and highly efficient strategy to fabricate a kilogram-scale alginate-Ca2+-Fe powder hydrogel (ALG-Ca2+-Fe) by turning commercial Fe powder into hydrogel for enhanced photothermal therapy. The ALG-Ca2+-Fe was formed by simply dispersing commercial Fe powder into the preformed alginate-Ca2+ hydrogel in a green and energy-/time-saving way. The hydrogel exhibited the advantages of ultrahigh loading capacity of Fe powder (>100 mg mL–1), excellent large-scale production capacity (>1 kg in lab synthesis), low cost (<1.7 $/kg), and good injectability. More importantly, large size and hydrophobicity endowed Fe powder with excellent tumor retention effect and minimal diffusion to surrounding tissues, greatly benefiting improving treatment efficiency and reducing side effects. In vivo and in vitro studies both proved that the large-scale produced ALG-Ca2+-Fe can be used for highly efficient and biosafe tumor treatment in vivo by simple noninvasive injection. The developed ALG-Ca2+-Fe with multiple superiors opens up a novel green way to develop efficient and safe photothermal therapeutic agents with great clinic transformation potential.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
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IF 9.038
Sisi Zhang,Jiayi Zhu,Xiwang Zhang,Runliang Zhu,Fei Ge,Yin Xu
Zero-valent Cu-Fe bimetallic porous carbon materials were successfully applied to remediate organic wastewater. In this work, we successfully recycled the layered double hydroxides (LDHs) adsorbed with Orange II (OII) to form a zero-valent Cu-Fe bimetallic porous carbon material (CuFe/Carbon). The characterization results showed that CuFe/Carbon was a zero-valent Cu-Fe bimetallic porous graphene-like carbon material. In the course of the experiment, we found that aeration condition had a great influence on the activity of CuFe/Carbon. The removal efficiency of nitrobenzene (NB) was 100 % in nitrogen system and 48 % in air system. The active species of O 2 − and O H was formed under air condition, while there was no active species under nitrogen condition. NB was reduced to aniline directly under nitrogen condition. We proposed there were reduction and oxidation mechanisms under different aeration conditions. This work mainly investigated the conversion process of a novel material under different reaction conditions, which provided theoretical support for the removal of organic matters.
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CATALYSIS TODAY
·
2020
·
IF 5.825
Juan Liu,Wen-Ying Li,Jie Feng,Xiang Gao
The improvement of the sulfur tolerance over Pt catalyst is critical for the hydrotreatment of crude oil. Fe was co‒impregnation with Pt on γ-Al 2 O 3 at different calcination temperature. Results revealed that adding Fe significantly facilitated the reduction of Pt oxides for the catalyst calcined at 400 °C. The morphological analysis and CO chemisorption showed Fe improved the dispersion of Pt nanoparticles. The surface chemical state analysis implied the co‒existence of the electron‒deficient Pt and metallic Fe. However, the increase of calcination temperature caused a decreased reducibility of Pt oxides due to strong metal support interaction. A higher dibenzothiophene hydrodesulfurization conversion of 97.7 % with a dominant biphenyl selectivity of 96.7 % were acquired for the catalysts incorporated with Fe. The density functional theory calculations confirmed the alloyed Fe led to the formation of electron‒deficient Pt atoms, and the higher affinity to sulfur made Fe be a favorable additive for noble metal catalyst in the hydrodesulfurization.
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 32
·16265-16270
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IF 11.301
Wenjuan Han,Ming Lu,Junnan Chen,Haojie Li,Haibo Li,Bingsen Zhang,Wei Zhang,Weitao Zheng
EMIm+, as a substitute for Li+, can solve the initial problems that accompany lithiation/delithiation processes on an anode. However, the larger size of EMIm+ limits the options when it comes to electrode materials. Herein, a multilayered Ti3C2Tx MXene was electrochemically pre-intercalated with Fe ions to achieve EMIm+ hosting abilities. As a result, a pre-intercalated MXene electrode exhibited enhanced EMIm+ transport and storage capabilities. When integrated with an EMIm+[PF6]− ionic liquid electrolyte, the assembled DIB provides an energy density of 76 W h kg−1 at a power density of 360 W kg−1, and 94.3% of the energy density is retained after 50 cycles. Compared with a pristine example, the Fe pre-intercalated Ti3C2Tx MXene showed a significant increase in electrochemical performance. Employing this approach to optimize layered materials may open up a new route for accurately tuning intercalated materials.
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Science Advances
·
2020
·Vol. 6
·期 18
·
IF 13.117
Chen-Cheng Xue,Meng-Huan Li,Yang Zhao,Jun Zhou,Yan Hu,Kai-Yong Cai,Yanli Zhao,Shu-Hong Yu,Zhong Luo
The rapid development of treatment resistance in tumors poses a technological bottleneck in clinical oncology. Ferroptosis is a form of regulated cell death with clinical translational potential, but the efficacy of ferroptosis-inducing agents is susceptible to many endogenous factors when administered alone, for which some cooperating mechanisms are urgently required. Here, we report an amorphous calcium carbonate (ACC)–based nanoassembly for tumor-targeted ferroptosis therapy, in which the totally degradable ACC substrate could synergize with the therapeutic interaction between doxorubicin (DOX) and Fe2+. The nanoplatform was simultaneously modified by dendrimers with metalloproteinase-2 (MMP-2)–sheddable PEG or targeting ligands, which offers the functional balance between circulation longevity and tumor-specific uptake. The therapeutic cargo could be released intracellularly in a self-regulated manner through acidity-triggered degradation of ACC, where DOX could amplify the ferroptosis effects of Fe2+ by producing H2O2. This nanoformulation has demonstrated potent ferroptosis efficacy and may offer clinical promise.
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Nanoscale
·
2019
·Vol. 12
·期 3
·2126-2132
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IF 6.97
Hui Xu,Hongyuan Shang,Cheng Wang,Liujun Jin,Chunyan Chen,Yukou Du
Although great successes have been accomplished on the controlled synthesis of 2D and 3D Pd-containing nanomaterials, tapping into the novel Pd-containing electrocatalysts that combined the advantages of both 2D and 3D structures remains a significant challenge. Here, an approach to systematically produce porous Fe-doped Pd nanosheet assemblies (NSAs) with a geometry tuning from PdFe hollow nanospheres (HNSs), PdFe nanocages (NCs), to PdFe nanoplates (NPs) is reported. The inherent ultrathin and porous features endow these PdFe catalysts with excellent electrocatalytic performance. As a result, the optimized 3D PdFe NCs show a much-improved methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR) activities in comparison with PdFe HNSs, Pd NPs, and commercial Pd/C catalysts. Moreover, these PdFe nanocatalysts also display greatly enhanced electrocatalytic stability, which can endure 500 cycles with negligible activity loss and structural changes. The mechanism investigations reveal that the introduced Fe atom efficiently modulates the electronic structure of Pd, leading to the downshift of the d-band center of Pd, which is beneficial for the adsorption of reactants. Moreover, the porous nanosheet assembly structure can provide rich mass and electron transfer channels, further boosting the improvement of electrocatalytic performance.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhuang Wang,Jinhu Wang,Lin Zhu,Yi He,Tao Duan
The effective removal of toxic and radioactive uranium (VI) (UO 2 2+ ) is very important for environmental protection and human health. Nevertheless, there is a lack of scalable adsorption materials for high-efficient and cost-effective removal of UO 2 2+ from water. In the present work, Fe@FeO core-shell nanoparticle (NP)-embedded wood is utilized for adsorption of UO 2 2+ from stimulated wastewater. The effect of various experimental conditions such as pH, reaction time, reaction temperature, and UO 2 2+ are investigated. The maximum adsorption capacity of UO 2 2+ is obtained at pH 4 (2.08 g UO 2 2+ of g Fe@FeO NPs), which is comparable to that of the reported FeNP and much higher than other Fe-containing nanoparticles for UO 2 2+ adsorption. The adsorption mechanism is ascribed to the redox reaction between Fe@FeO nanoparticles and UO 2 2+ , which reduce UO 2 2+ to UO 2 that is immobilized at the center of nanoparticles, while the wood matrix provides a support and does not adsorb UO 2 2+ . Meanwhile, the Fe@FeO NP-embedded wood is able to float on the surface of wastewater, which is easily separated and reused. More importantly, the low-cost Fe@FeO NP-embedded wood allows for scalable preparation, further improving the adsorption performance toward UO 2 2+ using the large-scale wood for future practical applications.
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JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xuelong Zhou,Liyu Lin,Yunhui Lv,Xiangyang Zhang,Liangdong Fan,Qixing Wu
Component materials and flow fields are key design parameters that influence the advection-diffusion-reaction process and thereby the performance of a Sn–Fe hybrid flow battery . In this work, various electrode configurations (empty chamber and porous carbon-based electrodes), membranes (cation and anion conducting) and flow fields (serpentine and interdigitated) are systematically investigated to elucidate their effects on the unique charge/discharge behaviors of the Sn–Fe flow battery with tin metal plating/striping. It is found that the battery capacity roughly increases linearly with the porosity of the porous electrode especially at low current densities , and a highly porous electrode (graphite felt) is more desirable than an empty chamber configuration in terms of capacity and power density. In addition, as compared to cation exchange membrane (Nafion 212), the anion exchange membrane (Fumasep FAP-450) exhibits improved capacities and columbic efficiencies in sulfuric acid-based electrolytes at low current densities due to the reduction of cation crossover. Interestingly, it is showed that although a serpentine flow field and a low flow rate generally lead to poor battery performance, they tend to ameliorate the maldistribution of plated tin at the negative electrode owing to the restricted mass transfer of reactants.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 46
·17472-17480
·
IF 8.067
Xiaowei Zhu,Yijiang Li,Tianchen Wei,Yichen Li,Tieling Xing,Matthew D. Shawkey,Guoqiang Chen
Photonic structures constructed from colloidal nanospheres present an attractive prospect for structural coloration in an ecological manner. However, the application of structural color in the field of textile coloration is usually blocked by their uncorrelated scattered light and feeble mechanical properties. Here, a non-iridescent structural color coating with high color saturation and mechanical stability is developed by assembling PS@TA–Fe(III) core–shell nanospheres. The rough surface and low surface charge are favorable for forming amorphous colloid arrays (ACAs) by restricting the crystalline alignment during the assembly process, resulting in non-iridescent structural colors. In addition, the as-prepared structurally colored cotton fabric possesses high color saturation and mechanical stability thanks to the intense light absorption and interface adhesion of the TA–Fe(III) shell. The preparation approach of this structural color coating is facile, low-cost, and environment-friendly, showing promising applications in textile coloration and smart displays.
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Molecular Catalysis
·
2022
·
IF 5.089
Weiwen Wang,Jianing Qu,Chaojie Li,Lexin Guo,Xianxin Fang,Guanghui Chen,Jihai Duan
Biomimetic photocatalytic nitrogen fixation is considered as a potential alternative to the Haber-Bosch method, which is an ideal pathway for nitrogen reduction. The development of efficient bionanocatalysts is a serious challenge in the current field of biomimetic nitrogen fixation. Here, we introduced a second metal in the MIL-88A/Fe mesh by metal doping to build a Mo-doped MIL-88A(Fe/Mo)/Fe mesh biomimetic system. The catalyst is a rod-like structure synthesized in situ by hydrothermal method using iron mesh as the substrate, and its rough surface is favorable for the adsorption of N 2 . The introduction of Mo provides a two-electron transfer pathway for the reaction, and the formation of the "MoFe cofactor" effectively promotes charge separation and inhibits the photoelectron-hole complexation. In addition, we kept the catalyst above the liquid surface and provided the proton source through water vapor, which solved the problem of the low solubility of N 2 in water and poor mass transfer efficiency. The results show that the biomimetic photocatalyst has good photoresponsiveness in the whole visible region, and the synergistic effect between the two metals makes the MIL-88A (Fe/Mo 0.017 )/Fe mesh exhibit better photocatalytic performance, and its nitrogen fixation efficiency reaches about 9.6 times that of the original MIL-88A/Fe mesh. This study provides a new idea for the design of photocatalytic ammonia biomimetic photocatalysts.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Likun Huang,Xinyi Di,Guangzhi Wang,Yue Hou,Huixian Wang,Dandan Wang,Dongdong Wang
The use of multifunctional materials as catalysts for the removal of organic pollutants from water is an emerging means of degradation. In this study, LaCuO 3 was prepared by citric acid composite sol-gel method, new LaCu x Fe 1-x O 3 composites were prepared by doping with Fe elements to form a complete perovskite type structure, the apparent morphology, crystalline structure and elemental morphology of the materials after B-site doping were analyzed by XRD , SEM, BTE and XPS characterization. The optimal performance of the material was determined for the doping amount of Fe 3+ x = 0.4, at a gel temperature of 80 °C, a complexing agent dosage of 1:3, and a calcination temperature of 700 °C. After system preference, determined that the LaCuO 3 /PMS system has good catalytic degradation. And optimal reaction conditions were a reaction temperature of 50 °C, an initial pH of 4, PS:12COD = 1.2, and a catalyst dosage of 1 g/L. The cellulosic ethanol wastewater COD removal rate reached 91.64 %. The discharge standard of cellulosic ethanol wastewater was met. Therefore, this study can provide a reference for the treatment of cellulosic ethanol wastewater.
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RSC Advances
·
2023
·Vol. 13
·期 49
·34371-34377
·
IF 3.9
Mingda Che,Hongjian Su,Xudong Zhao,Daqing Fu,Renliang Huang,Xuehui Guo,Rongxin Su
Trichloroethylene (TCE) is an Environmental Protection Agency (EPA) priority pollutant that is difficult to be removed by some remediation methods. For instance, TCE removal using persulfate (PS) activated by ferrous iron (Fe(II)) has been tested but is limited by the unstable Fe(II) concentration and the initial pH of contaminated water samples. Here we reported a new TCE removal system, in which tannic acid (TA) promoted the activation of PS with Fe(II) (TA-Fe(II)-PS system). The effect of initial pH, temperature, and concentrations of PS, Fe(II), TA, inorganic anions and humic acid on TCE removal was investigated. We found that the TA-Fe(II)-PS system with 80 mg L−1 of TA, 1.5 mM of Fe(II) and 15 mM of PS yielded about 96.2–99.1% TCE removal in the pH range of 1.5–11.0. Radical quenching experiments were performed to identify active species. Results showed that SO4˙− and ˙OH were primarily responsible for TCE removal in the TA-Fe(II)-PS system. In the presence of TA, the Fe-TA chelation and the reduction of TA could regulate Fe(II) concentration and activate persulfate for continuously releasing reactive species under alkaline conditions. Based on the excellent removal performance for TCE, the TA-Fe(II)-PS system becomes a promising candidate for controlling TCE in groundwater.
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