Advanced Energy Materials
·
2024
·
IF 24.4
Yanyan Zhang,Guangtong Hai,Zhuoshen Huang,Zhimeng Liu,Xiubing Huang,Ge Wang
Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMFOR) is an effective route to produce value-added chemicals with low energy consumption. In this work, efficient electrocatalysts are prepared by varying the amount of Ce doping and CeO 2 modification on NiFe layered double hydroxide (NiFe–LDH) nanosheets supported on carbon cloth (CC). Through Ce doping and heterogeneous interface construction, the electronic structure and coordination chemistry of NiFe–LDH are greatly changed. Compared to CeO 2 modification and the synergistic effect of Ce-doping and CeO 2 modification, CC@NiFeCe(3%)-LDH with only Ce-doping show excellent charge transfer ability, higher HMF conversion (95.73%), 2,5-furandicarboxylic acid (FDCA) selectivity (93.31%), and Faraday efficiency (99.47%) at only 1.44 V RHE . Density-functional theory calculations and X-ray fine structure spectroscopy demonstrate that Ce doping, compared with CeO 2 modification and their synergistic effects, significantly facilitates the electron transport and optimizes intermediate adsorption by effectively lowering the activation energy for the transformation of 5-formyl-2-furancarboxylic acid (FFCA) and encourage the conversion of FFCA to FDCA. Overall, this work systemically investigates the HMFOR behaviors of CC@NiFe–LDH under Ce doping, CeO 2 modification, and their synergetic effect, which provides some guidance on the development of high-performance electrocatalysts for HMFOR performance.
✓ 已验证
产品关联
DOI
高影响因子
Water
·
2024
·Vol. 16
·期 11
·1467
·
IF 3
Liying Che,Huanhuan Ji
Hydrotalcite/bismuth solid solution (2D/2D CoAl-LDH/BiO(OH)XI1−X) heterojunction photocatalysts were fabricated through a hydrothermal route. Because of their identical layered structure and interlayer hydroxides, CoAl-LDH(2D) and BiO(OH)XI1−X(2D) form a tightly bonded heterojunction, resulting in efficient light absorption, excitation, and carrier migration conversion. At the same time, the large specific surface area and abundant hydroxyl groups of the layered structure make the heterojunction catalyst exhibit excellent performance in the photocatalytic degradation of organic pollutants. Under visible light irradiation and in the presence of 1 g/L of the catalyst, 10 mg/L of methyl orange (MO) in water could be completely degraded within 20 min, and the degradation rate of tetracycline (TC) reached 99.23% within 5 min. CoAl-LDH/BiO(OH)XI1−Xstill maintained good photocatalytic degradation activity of tetracycline after five cycles, and the structure of the catalyst did not change. The reaction mechanism related to the degradation of TC by photocatalytic reactions was explored in detail, and the photoexcitation of the semiconductor heterojunction, as well as the subsequent free radical reaction process and the degradation pathway of TC were clarified. This work provides a promising strategy for the preparation of efficient photocatalytic materials and the development of water purification technology.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ayaz Muzammil,Rizwan Haider,Wenrui Wei,Lin Li,Liang Wu,Yi Fan,Xianxia Yuan
The development of highly efficient oxygen evolution reaction (OER) electrocatalysts is pivotal to enhance the performance of alkaline water electrolyzers. Herein, a facile two-step electrodeposition method is developed for the fabrication of nitrogen-doped carbon (NC) and manganese-incorporated NiFe layered double hydroxides (LDHs) supported on Ni foam (NF). When evaluated in 1.0 M KOH solution, the optimized material of NC20-Mn-NiFe LDH showed excellent OER performance requiring low overpotentials of 298 and 331 mV to achieve high current densities of 500 and 1000 mA cm–2, respectively, and no loss in current density was observed at fixed potentials of 1.53 and 1.57 V for 125 h in each case. This performance is not only better than that of the state-of-the-art RuO2/NF but also most of the recently reported LDH-based catalysts. Such a remarkable performance is mainly attributed to the vertical growth of NC20-Mn-NiFe LDH sheets on NF, facilitated electron transfer and charge density modulation on the active metal sites due to the electron-withdrawing and electron-donating effects of NC and Mn, respectively, resulting in the shift of the rate-determining step from OOH* formation to O2 desorption with decreased free energy. This research work provides further insights into modulating the structure of LDH-based materials to achieve a high OER performance delivering industrial-level current densities at low overpotentials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xin Tang,Yu Zhang,Jiaying Wu,Zhiyuan He,Yun Xing,Jie Yang,Zhirong Zou,Ke Huang,Huimin Yu,Xiaoli Xiong
In this work, a 3D ultra-thin NiCo-LDH nanosheet array coated Cu nanoparticles on carbon cloth (NiCo-LDH@Cu NSA/CC) was ultrafast synthesized by plasma magnetron sputtering for the first time. This method has low toxicity and is easy to operate. As a durable and efficient 3D heteronanoarray electrocatalyst for glucose detection, NiCo-LDH@Cu NSA/CC has higher stable conductivity and faster electron transport rate than NiCo-LDH NSA/CC and Cu nanoparticles, which work through synergistic effect to form a high-performance sensing platform. The NiCo-LDH@Cu NSA/CC heteronanosheet structure has good electrocatalytic performance for glucose oxidation, with the sensitivity of the two linear ranges (0.001–1 mmol L −1 and 1–6 mmol L −1 ) being 9710 μA L mmol −1 cm −2 and 4870 μA L mmol −1 cm −2 , respectively, and the detection limit (LOD) is 157 nmol L −1 (S/N = 3). The sensor has been successfully applied to detect glucose in beverages and serum.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Ting He,Jie Sun,Liangwei Deng,Jialin Ming,Changwei Hu
Due to its high efficiency, Fe(II)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants. A lot of chemical Fe sludge along with various refractory pollutants was concomitantly produced, which may cause secondary environmental problems without proper disposal. We here innovatively proposed an effective method of achieving zero Fe sludge, reusing Fe resources (Fe recovery = 100%) and advancing organics removal (final TOC removal > 70%) simultaneously, based on the in situ formation of magnetic Ca-Fe layered double hydroxide (Fe 3 O 4 @CaFe-LDH) nano-material. Cations (Ca 2+ and Fe 3+ ) concentration (≥ 30 mmol/L) and their molar ratio (Ca:Fe ≥ 1.75) were crucial to the success of the method. Extrinsic nano Fe 3 O 4 was designed to be involved in the Fe(II)-catalytic wastewater treatment process, and was modified by oxidation intermediates/products (especially those with COO − structure), which promoted the co-precipitation of Ca 2+ (originated from Ca(OH) 2 added after oxidation process) and by-produced Fe 3+ cations on its surface to in situ generate core-shell Fe 3 O 4 @CaFe-LDH. The oxidation products were further removed during Fe 3 O 4 @CaFe-LDH material formation via intercalation and adsorption. This method was applicable to many kinds of organic wastewater, such as bisphenol A, methyl orange, humics, and biogas slurry. The prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application performance to the recently reported CaFe-LDHs. This work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(II)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Huan Xu,Xiao Sun,Lingtong Ding,Jingjing Liu,Dan Zhang,Minmin Liu,Xiao Wang,Qixian Zhang,Jiujun Zhang
Electrochemical water-electrolysis for hydrogen generation often requires more energy due to the sluggish oxygen evolution reaction (OER). This work introduces a double-layered nanoflower catalyst, NiFe-LDH@S-NiFeO x /NF, featuring a crystalline NiFe-LDH coating on amorphous S-NiFeO x on nickel foam. Strategically integrating a crystalline-amorphous (c-a) heterostructure leverages strain engineering to enhance OER activity with low overpotentials ( η 100 = 220 and η 500 = 245 mV) and stability (135 h at η 100 and 80 h at η 500 ). Theoretical density functional theory (DFT) calculations reveal that the compressive strain can optimize the adsorption of oxygen-containing intermediates to reduce the reaction energy barrier, thus improving the reaction kinetics and performance of OER. Moreover, its phosphated derivative, NiFeP@S-NiFeO x /NF, exhibits high hydrogen evolution reaction (HER) performance ( η 10 = 64 mV, η 100 = 187 mV). An alkaline water-electrolysis cell of NiFeP@S-NiFeO x /NF(−)||NiFe-LDH@S-NiFeO x /NF(+) requires only a cell voltage of 1.77 V at 100 mA cm −2 , demonstrating excellent stability over 110 h (at both 10 and 100 mA cm −2 ). This work highlights the benefits of integrating crystal-amorphous interfaces and strain effects, offering insights into the understanding and optimizing catalytic OER mechanism and advancing water-electrolysis technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Xiaojuan Zhang,Ting Dong,Linhao Wang,Tianhua Yang,Yanlong Li,Wanli Zhang
With high microporosity, good dispersibility, excellent specific surface area and large content surface functional group, hydrochar demonstrates significant advantages and strong affinity towards pollutants in water. Modification method plays a significant role for anion adsorption by modified hydrochar, layered double hydroxide (LDH) modified hydrocarbons (Mg/Al-LDH@HC-HCl) have been synthesized through a one-step hydrothermal approach and activated with hydrochloric acid in this paper. The physical and chemical characteristics of the hydrochar, both before and after modification, are analyzed using BET, SEM-EDS, TEM, XRD, FTIR, and XPS to explore the phosphate adsorption mechanisms. The adsorption behavior of the composite follows the pseudo-second-order kinetic model and the Langmuir isotherm model, achieving a substantial adsorption capacity of 143.03 mg/g. Multiple mechanisms are leveraged within the absorption process, including pore filling, electrostatic attraction, ligand exchange, metal complexation on inner and outer surfaces, and ion exchange. An approximate 70% phosphate removal efficiency is retained by modified Mg/Al-LDH@HC-HCl after a comprehensive 5-cycle desorption using NaOH as the eluent, demonstrating the remarkable regenerability of synthesized hydrochar composite.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zekai Mu,Xianglei Liu,Hang Shi,Chao Song,Chunzhuo Dang,Ke Gao,Nan Sun,Cheng Tian,Hangbin Zheng,Xinrui Wang,Yimin Xuan
By converting two greenhouse gases into fuels, CO 2 reforming of CH 4 via free and clean solar energy is a promising solution to the energy shortage and global warming problems simultaneously. However, serious challenges such as limited light-to-fuel efficiency, severe catalyst aggregation, and deactivation still exist for reactors employing traditional catalyst powders. Here, Ni/MgAlO x -LDH catalysts loaded Ni foam reactor with heat recovery is proposed for highly efficient and stable CO 2 reforming under direct concentrated solar irradiation. The temperature nonuniformity is reduced by 84.3% compared to powdered systems, which benefits from the high thermal conductivity of nickel foams. Overheating is also prevented, which leads to much less carbon deposition and relieved active sites aggregation. Ultrahigh light-to-fuel efficiency of 36.51% is achieved, which is much higher than that of traditional powdered systems (23.87%). Numerical simulation results have an excellent agreement with experiments and demonstrate that heat recovery can greatly improve CRM rates by 23.8%. This work opens new routes to achieve highly efficient, stable, and scalable solar-driven CO 2 reforming via Ni/MgAlO x -LDH catalysts loaded Ni foam reactors with heat recovery.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Longlong Liu,Zunpeng Hu,Minghui Wang,Jinliang Ma,Zihao Chen,Xin Ning,Ding Yuan
The construction of a hybrid hierarchical architecture is a promising strategy for optimizing the electrocatalytic activity and the performance of flexible Zn-air battery. However, it still remains a challenging task. This study reports on the use of a simple approach in the preparation of a flexible 3D self-supporting bifunctional catalyst. Ultrathin NiFe-based layered double hydroxide nanosheets (NiFe-LDH) have in this approach been strongly coupled to a metal-organic framework (MOF)-derived carbon nanoflake array, to be used in flexible Zn-air batteries. Importantly, the introduction of Co nanoparticles that were anchored onto the nitrogen-doped porous carbon (Co-NC) nanoflakes provided an abundance of active sites for the oxygen reduction reaction (ORR). Moreover, the catalytic oxygen evolution reaction (OER) process was improved by altering the local electronic structure of the Ni and Fe species in NiFe-LDH. The 3D interconnected conductive network structure, in addition to the strong coupling between NiFe-LDH and Co-NC, was found to give a catalyst with superior electrocatalytic OER performances. The overpotential was only 284 mV at 50 mA cm −2 in an alkaline medium, which is a result that outperforms the commercial RuO 2 catalyst. This bifunctional catalyst did also exhibit a good catalytic performance that is comparable to that of commercial Pt/C towards ORR. Interestingly, when this catalyst was used as binder-free air cathode, the assembled flexible solid-state Zn-air battery demonstrated a favorable power density, cycling stability, and mechanical flexibility. The present work offers a facile and efficient strategy for the development and construction of self-supporting bifunctional OER/ORR electrocatalysts , to be used in wearable and flexible electronic devices.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenwen Wang,Yutang Kang,Canyu Cui,Xinyan Lv,Zisheng Wang,Boran Wang,Yumei Tan,Shihui Jiao,Guangsheng Pang
A hierarchical micro/nanostructure has been successfully fabricated, which is constructed by anchoring polyethersulfone (PES) nanoparticles on Zn-Ni-Co layered double hydroxide (LDH) nanowires with stainless steel mesh as supporter (PES/PDA@ZNCNW-SSM). The PES/PDA@ZNCNW-SSM shows excellent underliquid dual superlyophobicity with underwater tetrachloroethylene contact angle and under n-hexane water contact angle of 166.7° and 166.8°, respectively. The underliquid dual lyophobic PES and microporous structure formed by Zn-Ni-Co LDH nanowires synergistically contribute to the underliquid dual superlyophobic surface, which is beneficial for effective and controllable organic liquid/water separation. After 10 cycles of alternate separation, the separation efficiencies of PES/PDA@ZNCNW-SSM are above 99.9% and 99.4% for water-in-tetrachloroethylene and tetrachloroethylene-in-water emulsions, respectively. The underliquid dual superlyophobicity can also be obtained with carbon cloth, non-woven fabric, Ni foam and filter paper as supporter and the corresponding membranes can be used to efficiently separate organic liquid/water mixtures on-demand. These results confirm that the hierarchical micro/nanostructure anchored with underliquid dual lyophobic PES nanoparticles is an effective route for the preparation of underliquid dual superlyophobic materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jihao Su,Yu Zhang,Yuntong Meng,Xiaohui Guan,Min Lu
Supercapacitors , with their potential to revolutionize energy storage and usage, are an encouraging electrochemical energy storage technology. In this field, metal-organic framework (MOF) is considered as an excellent precursor and self-sacrifice template for synthesizing high performance electrode materials. On the outside of CoNi-MOF hollow spheres, zeolitic imidazolate framework (ZIF-67) is epitaxially grown to form a hierarchical porous structure. Then, a bit of nickel ions are added for etching and precipitation reactions, so that the structure can be further processed. The specific capacitance of CoNi@ZIF-LDH composite can achieve 1488 F g −1 at a current density of 1 A g −1 , and it has complete reversibility after 3000 cycles (cycle efficiency is 83.87 %). In addition, the maximal energy density of CoNi@ZIF-LDH//AC HSC is 49.8 Wh kg −1 when the power density is 800 W kg −1 . Meanwhile, it shows remarkable cycle durability (the capacitance retention rate is 94.85 % after 5000 cycles). This unique electrochemical property is primarily related to the establishment of hierarchical porous structures and the subsequent structural change produced by the site-directed transformation strategy. The special structural design and optimization of MOF materials provide a more convenient, more expandable, and more promising new idea for preparing high-efficiency electrode materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 36
·14299-14314
·
IF 4.5
Xu Chenzhe,Qiu Yue,Wang Zheng,Gao Zifei,Liu Cai,Sun Yanran,Zhang Haitao,Ma Juanjuan,Liu Lin,Liu Chao,Tong Zhiwei
A facile one-step hydrothermal approach was proposed to fabricate Pd nanoparticles decorated Mg–Al layered double hydroxide nanosheets (denoted as Pd NPs/Mg–Al LDH composite), wherein polyvinylpyrrolidone (PVP) functioned as both a reductant and stabilizer. The resulting samples were characterized by XRD, SEM, TEM, XPS and BET techniques. The effect of synthetic parameters during the hydrothermal reaction including PVP dosage and temperature on the size and distribution of Pd NPs was investigated in details. Pd nanoparticles with an average particle size of 3.6 nm were uniformly supported onto Mg–Al LDH nanosheets under the optimal conditions. The obtained Pd NPs/Mg–Al LDH composite could serve as an efficient heterogeneous catalyst for the Heck reaction between iodobenzene and methyl acrylate, achieving a high yield of 95.8% within 60 min at 100 °C. Furthermore, Pd NPs/Mg–Al LDH was highly stable and reused 6 times without significant loss of its catalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）