CATALYSIS LETTERS
·
2025
·Vol. 155
·期 2
·1-15
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IF 2.4
Li Ziyuan,Luo Mingsheng,Yang Zhi,Cui Xiaoteng,Yang Wenshuai,Xia Lingman,Shao Changke,Rahman Roshni
To effectively mitigate the global warming issue, it is crucial to develop advanced technologies that can significantly reduce carbon dioxide emissions. CO 2 hydrogenation for methanol synthesis is increasingly recognized as a promising chemical approach for the green-house gas utilization. In this study, we present a highly active, selective and stable Mo modified ZnCu-MOF and ZnCuAl-LDH composite catalysts, which achieves 18% CO 2 conversion and 70% methanol selectivity at 230 °C, 3.0 MPa at a space velocity of 3600 mL·g cat −1 ·h −1 . Furthermore, after 140 h of operation, the catalyst demonstrates superior durability. In-situ DRIFT results reveal that this CO 2 hydrogenation reaction over the ZnCu-MOF and ZnCuAl-LDH composite catalysts proceeds through key intermediate formate species, ultimately leading to the methanol formation. In contrast, the Mo-modified catalysts facilitate the CO insertion reaction (CO 2 → CO*, CO* + *CH x → CH 3 OH), thereby enhancing the methanol yield. Graphical
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Nanoscale
·
2024
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IF 5.8
Yufeng Wu,Zhiyan Hou,Changlong Wang
Renewable electricity-powered electrooxidation of 5-hydroxymethylfurfural (HMFOR) to FDCA offers a green and sustainable approach to producing an essential monomer for bio-polymers, provided that a highly efficient electrocatalyst is present. Herein, we show that the doping of scandium (Sc) into an NiFe-LDH electrocatalyst (Sc-NiFe-LDH) considerably promotes HMFOR by enhancing the formation of high-valence NiIII–O active sites, facilitating electron transport and HMF adsorption and suppressing the oxygen evolution reaction. In the presence of the Sc-NiFe-LDH electrocatalyst, an FDCA faradaic efficiency and selectivity of 96.5% and 99.5%, respectively, were achieved at a current density of >600 mA cm−2. The high performance of the Sc-NiFe-LDH electrocatalyst is the best among those of other reported electrocatalysts for this reaction, showing great promise in upgrading biomass to valuable chemicals. This work would inspire further studies on the rational design of novel and efficient electrocatalysts for green and sustainable energy transformations.
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PubMed
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BIOMATERIALS
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2013
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IF 7.604
Dian Li,Yu-Ting Zhang,Meng Yu,Jia Guo,Deeptangshu Chaudhary,Chang-Chun Wang
Hierarchical structured nanomaterials with diverse functionality, such as magnetic susceptibility , stimuli-responsiveness, environmental sensing and biocompatibility, are highly sought after for biomedicine and biodetection alike. In this study, we designed and fabricated a new kind of multifunctional core/shell nanospheres as biodegradable targeted drug carriers, the controlled drug release progress and therapeutic effect were monitored in-situ by the fluorescent state of the cells. Firstly, the core/shell nanospheres with biodegradability were synthesized using magnetic supraparticles (MSPs) as core and the layered double hydroxide (LDH) as shell via a hydrothermal route, the reaction parameters were well investigated to obtain the desired structure of the LDH shell. The anti-cancer drug doxorubicin was modified with carboxyl group (DOX-COOH) and loaded in the shell of MSPs/LDH nanospheres via an anion-exchange intercalation. To endow the nanospheres with tumor-targeting capability, IDA (iminodiacetic acid)-modified folate was successfully immobilized onto the surface of LDH shell using chelating interaction. These nanospheres behaved as multifunctional carriers for targeted delivery of anti-cancer drug, doxorubicin (DOX), within Hela cells and thus, these nano-drugs exhibited clear cytotoxicity and inhibition toward Hela cells as compared to normal cell-lines of HEK 293T cells. Interestingly, after the internalization of these nano-drugs, there was a sharp contrast in illumination between the tumorous Hela cells and the normal HEK 293T cells, the acidic cytoplasm of Hela cell stimulated DOX-COOH in LDH shell quickly degraded into positive-charged DOX, and then rapidly escaped from the positive-charged intercalation of LDH shell by strong repulsive interaction, the released DOX rapidly lit up the whole tumor cells in a short time, but only very weak light was found in HEK 293T cells.
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International Journal of Electrochemical Science
·
2024
·
IF 1.3
Peng Zhang,Xin Meng,Xiaomin Luo,Jian Wang,Jianyan Feng,Yun Ma,Ka Li,Ying Liu,Lufeng Ji
Herein, we innovatively crafted a novel CNT/MoS 2 /FeCo-LDH cathode membrane using a facile vacuum filtration method. Benefiting from the unique heterostructure between FeCo-LDH and MoS 2 , the prepared CNT/MoS 2 /FeCo-LDH cathode membranes catalyzed the production of high-concentration H 2 O 2 (7.59 mg/L) at a low current density of 1.50 mA/cm 2 . The peak degradation efficiency of phenol (98.80 %) was reached in only 60 min. Under optimized operating conditions, the phenol removal rate of the CNT/MoS 2 /FeCo-LDH cathode membrane remained above 80.00 % within a wide pH range (3.0–9.0), demonstrating excellent adaptability. The synergistic incorporation of Mo, Fe, and Co ions facilitated additional chemical reaction pathways for Fenton-like reactions, thereby significantly enhancing hydrogen peroxide production. Notably, our approach exhibited moderate total organic carbon degradation efficiency, even for the actual pretreatment of coking wastewater, presenting a promising strategy for addressing recalcitrant industrial wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Hongbin Chen,Zhongye Yu,Weikun Sun,Tao Li,Jian Zhang,Zumin Qiu,Mohammad Younas
In this work, 2LDH-CoFe 2 O 4 @BHC catalyst was prepared by modifying magnetic corncob-based hydrochar (CoFe 2 O 4 @BHC) with Co/Fe layered double hydroxide (Co/Fe-LDH), which was used to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation. 2LDH-CoFe 2 O 4 @BHC demonstrated effective activation of PMS and rapid removal of TC (100 %) within 10 min by leveraging structural modulation and synergistic interactions among multiple components. In contrast, BHC (26.02 %), CoFe 2 O 4 (59.25 %), and CoFe 2 O 4 @BHC (61.88 %) presented poor removal efficiency. Furthermore, it was shown that both the free radicals (SO 4 •- ) and non-free radicals ( 1 O 2 ) were essential in the degradation process, and the catalytic mechanism was revealed to be a synergistic process with the characterization results from in-situ Raman, electrochemical characterization, and X-ray photoelectron spectroscopy (XPS). The catalytic performance of 2LDH-CoFe 2 O 4 @BHC was also evaluated using a self-developed fixed-bed reactor, demonstrating its strong stability and resistance to interference during long-term operation. The potential degradation pathway of TC in the 2LDH-CoFe 2 O 4 @BHC + PMS system was suggested based on the quadrupole time-of-flight mass spectrometry (QTOF/MS) findings. It was found that the toxicity of the intermediates produced by TC degradation significantly reduced. This study presented an insight for the decomposition of organic pollutants by synthetic biochar-loaded catalysts.
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CELLULOSE
·
2024
·Vol. 31
·期 13
·8369-8385
·
IF 4.9
Gao Lu,Bao Yan,Tang Pei,Liu Chao,Zhang Wenbo
Eco-friendly and highly flame-retardant coatings for cotton fabrics urgently need to develop, but still faces significant challenges including the inadequacy of organic flame retardants, the adverse effects of high-load inorganic flame retardants on cotton fabrics, and the flammability of adhesives. Hence, this study describes a sandwich-like nanocoating for the fabrication of highly flame-retardant cotton fabric. Phytic acid (PA), a bio-based polyacid, was employed to prepare phosphorus-containing waterborne polyurethane (P-WPU) as the flame-retardant adhesive. With the help of multi-metallic layered double hydroxide (CoMnAl-LDH) and PA, six types of sandwich-like nanocoatings were constructed on cotton fabrics. Evaluation of their flame retardancy through vertical burning and cone calorimeter tests revealed that the sandwich-like nanocoating composed of PA as the top layer, P-WPU as the middle layer, and LDH as the bottom layer demonstrated exceptional flame retardancy in cotton fabric. It self-extinguishes within 5 s and the highest LOI value of 31.5% in all fabric samples, representing an increase of 89.76% over the pristine fabric. Meanwhile, the peak heat release rate (PHRR, 82.60 kW/m 2 ) and total heat release (THR, 1.67 MJ/m 2 ) were significantly reduced by 71.65% and 54.74%, respectively, relative to those of the pristine fabric. A synergistic flame-retardant mechanism was proposed that involved multiple barrier effects, catalyzing carbonization, and the release of non-flammable gases. Overall, this work may provide valuable insights for constructing highly flame-retardant cotton fabric, offering potential solutions to solve industry challenges.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yifan Wang,Tingjuan Wang,Xiaowen Wu,Jiancheng Wang,Endong Chang,Zhaohui Huang,Minghao Fang,Xin Min,Shiming Su
Forward osmosis membrane has shown great potential in the fields of seawater desalination and sewage treatment. However, the concentration polarization phenomenon and membrane fouling in the water treatment process greatly reduce the water treatment performance and restrict its application. To address these challenges, we employed a pre-buried seed-in-situ growth method to facilitate the Zn–Al layered double hydroxide (Zn–Al LDH) growth on the thin nanofiber membrane, and use it as the support layer for the preparation of a Zn–Al LDH modified forward osmosis membrane. Studies have shown that the introduction of Zn–Al LDH significantly improves the water treatment efficiency of the forward osmosis membrane (In Al-DS mode, the water flux increased by 87.5 %, up to 50.50 LMH, with a low specific salt flux of 0.13 g L −1 ). It also exhibits exceptional antibacterial, anti-membrane fouling, and photocatalytic degradation properties. This research presents a novel approach for the development of advanced high-efficiency forward osmosis membranes.
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CHEMICAL ENGINEERING SCIENCE
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2024
·
IF 4.1
Zhuoshu Song,Haicheng Xuan,Shasha Liu,Lingxin Meng,Jie Wang,Xiaohong Liang,Yuping Li,Zhida Han,Peide Han
Exploring high active, low cost and stable electrocatalysts to replace noble precious metals has always been the major challenge in overall water splitting applications. Herein, CoFe-layered double hydroxide/Cobalt phosphide heterostructures on nickel foam (CoFe-LDH@CoP/NF) have been synthesized by using hydrothermal, chemical vapor deposition (CVD) and electrodeposition methods. The CoFe-LDH nanosheet is uniformly deposited on the surface of CoP nanowires to create the heterostructure. The formation of heterostructure increases active surface area, accelerates charge transfer velocity, optimizes the kinetics of reaction, thereby significantly improves electrocatalytic activity of the materials. The CoFe-LDH@CoP/NF attains 10 mA cm −2 with a low overpotential of 238 mV for OER and only 63 mV for HER. The catalyst provides the current density of 10 mA cm −2 throughout the overall water splitting by only requiring a low potential of 1.54 V. The CoFe-LDH@CoP/NF as an ideal electrocatalyst provides new ideas for developing efficient non-noble metal-based overall water splitting catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xian Wang,Ze Qin,Jinjie Qian,Liyu Chen,Kui Shen
Developing low-cost but efficient electrocatalysts for continuous oxygen evolution reaction (OER) at ampere-level current densities can promote the hydrogen economy. LDHs are promising electrocatalysts to replace noble-metal-based catalysts for efficient OER, and rationally constructing LDH-based heterostructures can further boost their OER activities. Herein, we report the anchoring of FeNi-LDH nanoflakes onto MOF-derived carbon nanotube (CNT) networks on carbon cloth to obtain the self-supported LDH/CNT/CC. Benefiting from the advantages of its CNT network and the highly-active sites of its three-layer heterostructure, the optimized LDH/CNT/CC only requires a low overpotential of 200 mV at 10 mA cm −2 and exhibits robust stability under continuous electrolysis for 160 h at an ampere-level current density of 1 A cm −2 . Theoretical calculations show three-layer FeNi-LDH(001)/graphene(002)/Co(111) slab has the lowest OER energy barrier, and its graphene layer can gain electrons from the FeNi-LDH and Co to show the most suitable binding strength for intermediates to facilitate OER.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
·
IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Gaimei Gao,Mingyu Dou,Xiaojie Liu,Erkang Liu,Zixian Wang,Guang Yang,Hua Yang,Wenning Yang,Dacheng Li,Jianmin Dou
The development of photocatalysts with non-noble metals and the effective separation of photoexcited carriers is a significant strategy for accelerating surface reaction kinetics and promoting water splitting to produce H 2 . Herein, an exquisite core-shell NiFe-LDH@ZnIn 2 S 4 heterojunction photocatalyst was constructed by in situ decoration of ultrathin ZnIn 2 S 4 nanosheets on the surface of the flower-like NiFe-LDH microsphere . The synthesized 3D hierarchical NiFe@ZIS-25 composite exhibits enhanced photocatalytic H 2 evolution activity, reaching 9.12 mmol·h -1 ·g -1 , which is 2.52-fold higher than pure ZnIn 2 S 4 . The significant improvement in H 2 evolution performance could be attributed to the hierarchical core-shell structure of the NiFe@ZIS-25 photocatalyst, which enhanced the light capture ability. In addition, the interfacial coupling effect of ZnIn 2 S 4 and NiFe-LDH is beneficial to the migration of carriers. More importantly, the construction of Z-scheme heterojunction efficiently promotes the fast translation of photogenerated carriers while preserving a stronger reduction potential to achieve H 2 evolution. This work elucidates a rational strategy to develop efficient photocatalysts with hierarchical core-shell structures for water splitting.
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POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Zhishuo Liu,Yifang Hua,Suqin Liu,Hongfei Li,Xiaoyu Gu,Jun Sun,Sheng Zhang
In this study, a novel approach was employed to enhance the flame retardant efficiency of an intumescent flame retardant (IFR) by growing a layered double hydroxides (LDHs) of Zn/Fe on the surface of melamine polyphosphate (MPP), denoted as Zn/Fe-LDH@MPP (LDHMPP). This modification was carried out via in-situ co-precipitation, and the resulting composite was subsequently applied to polypropylene (PP) in conjunction with piperazine pyrophosphate (PAPP). Under the same proportion and concentration, the PP/16 %LDHIFR formulation achieved a preferred V-0 rating in the UL-94 test. Furthermore, this formulation exhibited an enhanced ability to form a protective char layer, as evidenced by both cone calorimetry tests (CCT) and thermogravimetric analysis (TGA) tests. Additionally, the synergistic effect of Zn/Fe-LDH on flame retardancy was also studied.
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