JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
You Wang,Lijuan Qiao,Derui Zhu,Junjie Yu,Feiyan Chen,Riming Hu,Yongcheng Li,Benhua Xu,Denglong Lu,Li Gao,Guanshun Xie,Peng Zhang,Bingxin Liu
Layered double hydroxides (LDHs) hold promise for lithium (Li) extraction from salt-lake brines, owing to their distinctive layered structure and ion-exchange capability. However, the challenge of precisely modulating their electronic structure limits adsorption selectivity and capacity toward lithium-ion (Li + ). Herein, MgAl-LDH nanosheets are anchored on graphene oxide (GO) (GO@MgAl-LDH) via an in-situ growth method to achieve efficient Li + extraction. The experimental and theoretical calculations pinpoint that the hyperfine coupling interaction between GO and MgAl-LDH modulates the electronic structure of interlayer CO 3 2− in MgAl-LDH, thereby optimizing the active sites for Li + adsorption. This hyperfine coupling interaction endows the optimized GO@MgAl-LDH composite with a maximum adsorption capacity of 12.96 ± 0.50 mg·g −1 in simulated salt-lake brine, which is 3.00 and 4.56 times higher than those of pure MgAl-LDH (4.31 ± 0.35 mg·g −1 ) and GO (2.84 ± 0.46 mg·g −1 ), respectively. Practical applications in 11 representative salt-lakes across the Qinghai-Tibet Plateau of China demonstrate that the GO@MgAl-LDH maintains remarkable Li + adsorption performance in real brines, with a maximum adsorption capacity of 5.92 ± 0.18 mg·g −1 in East Taigener Lake. Ecological assessments based on microbial diversity and water quality analyses exhibit that the GO@MgAl-LDH does not induce water quality deterioration, thus ensuring its environmental safety and compatibility.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Xiao Xiao,Zhiyuan Wang,Zhengting Wang,Rui Gao,Yujie Xiang,Wen Ge,Qihang Zhou,Shukang Deng
Highly efficient, cost-effective, and durable electrocatalysts are crucial for scalable renewable hydrogen production via water electrolysis. Herein, a Ni 3 Se 2 –Mo@NiFe-LDH composite catalyst was synthesized through a hierarchical strategy combining two-step hydrothermal treatment and electrodeposition. The catalyst exhibits outstanding OER performance, delivering a low overpotential of 205 mV at 10 mA cm −2 and stable operation for 200 h. In this heterostructure, the conductive Ni 3 Se 2 core promotes electron transport, while the in-situ formed NiMoO 4 phase regulates the electronic structure to optimize oxygen intermediate adsorption. Meanwhile, the NiFe-LDH shell undergoes surface reconstruction during operation, forming an active oxyhydroxide layer that activates the lattice oxygen mechanism (LOM). Operando Raman spectroscopy and post-stability analyses (XPS, SEM, ICP-OES) verify the formation of the active phase and preserved structural integrity. The synergistic effects of electronic modulation and interfacial engineering accelerate charge transfer and reduce OER kinetic barriers, offering an effective strategy for developing high-performance non-precious-metal OER catalysts.
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高影响因子
Nanoscale
·
2023
·Vol. 15
·期 20
·9049-9059
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IF 6.7
Xiaolong Deng,Shanshan Wang,Yi Liu,Jiafeng Cao,Jinzhao Huang,Xingwei Shi
In this study, a hierarchical interconnected porous metal sulfide heterostructure was synthesized from CoFeAl layered double hydroxides (LDHs) by a two-step hydrothermal process (sulfidation and a NaOH etching process). Among the as-made samples, the CoFeAl-T-NaOH electrode exhibited excellent oxygen and hydrogen evolution reaction catalytic activities with overpotentials of 344 mV and 197 mV at the current density of 100 mA cm−2, respectively. Meanwhile, small Tafel slopes of 57.7 mV dec−1 and 106.5 mV dec−1 for water oxidation and hydrogen evolution were observed for the CoFeAl-T-NaOH, respectively. Serving as both the cathode and anode for overall water splitting, the CoFeAl-T-NaOH electrode reached a current density of 10 mA cm−2 at a cell voltage of 1.65 V with excellent stability. The enhanced electrocatalytic activity could be attributed to: the hierarchical interconnected nanosheet structure facilitating mass transport; the porous structure promoting electrolyte infiltration and reactant transfer; the heterojunction accelerating charge transfer; and the synergistic effect between them. This study offered a new clue for in situ synthesizing porous transition-metal based heterojunction electrocatalysts with a careful tuning of the sequence of sulfuration and alkaline etching to enhance the electrocatalytic performance.
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高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1741-1749
·
IF 2.8
Xiong Qiming,Li Xiongzhuang,Zhou Mulan,Chen Rentian,Sun Cheng,Zhou Yanyan,Wang Sijia,Qiu Xiangyun,Song Meijia,Wei Tao
Nickel cobalt layered double hydroxide (NiCo-LDH) nanosheets have attracted much interests in lithium-ion batteries (LIBs) because of its high capacity and low cost. However, the low cycling stability limits their practical applications. Herein, we introduce a simple one-pot hydrothermal method to fabricate a novel flower-shaped Zif-67@NiCo-LDH heterostructure as the anode materials. The structures, morphology, and compositions of the materials were studied by XRD, SEM, TEM, XPS, EDX, and Raman spectra. Electrochemical tests were also conducted. The Zif-67@NiCo-LDH simultaneously inherited the cycling stability of Zif-67 and the high capacity of NiCo-LDH, which effectively improves the conductivity and structural integrity under the synergistic effect of the flower-shaped heterostructures and compositions and showed a good electrochemical performance. This work might enable the future design of heterostructures materials with layered double hydroxide for many other energy-storage technologies.
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 46
·17743-17752
·
IF 4.569
Xinyuan Yu,Jiaying Shen,Qianqiao Chen,Qin Zhong
The rational design of heterostructures, including the synthesis of candidate materials and the construction of structures, is particularly important for the activities of electrocatalysts. Herein, a unique heterostructure of ultrathin NiCo-LDH wrapped CuNiCo trimetallic spinel sulfides was constructed via facile hydrothermal and electrodeposition processes. Due to the ultrathin NiCo-LDH layer, the change in the local electronic structure resulting from the interaction of two components can be effectively transferred to the surface of electrocatalysts, which was verified by XPS tests. The heterostructure exhibits excellent activity and stability as efficient bifunctional electrocatalysts for overall water splitting. The corresponding overpotentials are 270 mV at 50 mA cm−2 for the oxygen evolution reaction (OER), and 93 mV at 10 mA cm−2 for the hydrogen evolution reaction (HER) in 1.0 M KOH, respectively. It is noteworthy that the OER activity exceeds that of RuO2. Meanwhile, the heterostructure presents excellent stability for more than 40 hours. The outstanding performance is attributed to the surface electronic structure of NiCo-LDH optimized by highly conductive and stable CuNiCo trimetallic spinel sulfides. The results confirm that it is an effective strategy to tune the catalytic performance by constructing a heterostructure with an ultrathin surface layer.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ling Yang,Lei Sheng,Xingxu Gao,Xin Xie,Yaozong Bai,Gaojun Liu,Haoyu Dong,Tao Wang,Xianli Huang,Jianping He
Lithium metal batteries (LMBs) with ultra-high theoretical energy density are a prospective candidate to replace current lithium-ion batteries (LIBs). However, there are still two non-negligible problems of lithium dendrites and the volume expansion effect of LMBs. In this study, reduced graphene oxide (rGO)/Li-Al-LDH composite nanosheets were firstly prepared via a hydrothermal method and then vacuum filtered onto commercial polypropylene (PP) separator. This kind of rGO/Li-Al-LDH nanosheets layer is expected to improve the wettability of liquid electrolytes and thermal stability. Furthermore, rich- Li-Al LDH can promote more ionic carriers and channels, which exhibits higher-efficiency lithium-ion transport properties. Meanwhile, rGO with a graphitic-like structure is able to disperse the concentration of electrons at the sharp point when lithium dendrites arise. As a result, the discharge capacity of the Li||LiFePO 4 cells based on the rGO/Li-Al-LDH@PP separator is still 1.852 mAh after 250 cycles and the capacity decay rate is just 4.24%. It is demonstrated that a feasible and effective strategy for the modified separator can enhance the electrochemical performance of LMBs.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2022
·
IF 4.644
Chun Sun,Yinke Wang,Lixu Wu,Jun Hu,Xinqi Long,Hongtao Wu,Feipeng Jiao
MgAl-LDH/(BiO) 2 CO 3 p-n heterojunction nanocomposite was prepared using a hydrothermal method . The as-prepared MgAl-LDH/(BiO) 2 CO 3 composites were characterized through XRD , SEM&EDX, TEM , FT-IR, XPS , as well as UV–vis DRS . The photodegradation activity of MgAl-LDH/(BiO) 2 CO 3 was examined through the degradation of tetracycline under visible light irradiation. The maximum degradation efficiency (97.2%) was achieved among the heterostructures when the percentage of MgAl-LDH was 15%. Moreover, the degradation efficiency of MgAl-LDH/(BiO) 2 CO 3 still reached 88% after five successive cycles. Furthermore, a photocatalytic mechanism involved was proposed by exploring its energy band structure . In this study, a novel method for photocatalytic degradation of tetracycline was proposed.
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ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qifeng Lin,Zeyu Yuan,Dongyi Wang,Wei Wei,Xibin Wang,Wei Han,Lili Wang
The growing problem of limited lithium resource reserves has resulted in increased attention and a corresponding surge in sodium-ion battery (SIB) research. However, SIBs have disadvantages, such as a short cycle life and low energy density. The lack of high capacity and long-cycle stability anode materials are important factors hindering the development of SIBs. In this study, hollow carbon nanospheres were nitrogen-doped, and the zeolitic imidazolate framework-67 was used as a precursor to synthesize cobalt-based layered double hydroxide using the hydrothermal method followed by synthesizing an NHCNS@CoSe 2 @C complex using calcination and carbon coating. In this design concept, the hollow-cavity structure of the carbon nanospheres provided shorter electron diffusion paths and increased stability; the introduction of nitrogen increased the number of defect sites and charge density of the porous carbon materials, which, with the transition metal selenide, enhanced the conductivity of the final product. The resulting carbon-supported anode material, NHCNS@CoSe 2 @C, had an initial stable discharge capacity of 465.6 mAh g − 1 at a current density of 0.1 A g − 1 and maintained a high capacity of 373.8 mAh g − 1 after 100 cycles. Moreover, it exhibited a high rate performance of 285.6 mAh g − 1 at a current density of 5 A g − 1 .
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Polymers
·
2022
·Vol. 14
·期 11
·2204
·
IF 4.967
Yi Qian,Wenyuan Su,Long Li,Rongmin Zhao,Haoyan Fu,Jiayin Li,Peidong Zhang,Qingjie Guo,Jingjing Ma
In this work, a novel three-dimensional (3D) hollow nickel-cobalt layered double hydroxide (NiCo-LDH) was synthesized using zeolitic imidazole framework-67 (ZIF-67) as a template, and then utilized to functionalize molybdenum disulfide (NiCo-LDH/MoS2) via electrostatic force. Flame retardant thermoplastic polyurethane (TPU) composites were prepared by the melt blending method. Compared to pure TPU, NiCo-LDH/MoS2filled TPU composite was endowed with a decrease of 30.9% and 55.7% of the peak heat release rate (PHRR) and the peak smoke production rate (PSPR), respectively. Furthermore, the addition of NiCo-LDH/MoS2can significantly improve the thermal stability and char yield of the TPU composite. The catalytic carbonization effect and dilution effect of NiCo-LDH, and the barrier effect of MoS2nanosheets enable TPU composites with excellent flame retardancy and toxic gas suppression ability.Keywords:layered double hydroxide;molybdenum disulfide;thermoplastic polyurethane;flame retardancy
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Fang Chengqian,Dai Yimin,Chen Ling,Wang Zhiheng,Lu Qi,Li Yaqi,Cai Ling,Liu Bo,Zhang Yue-Fei,Li Yan,Wan Li
A magnetic Cl − -intercalated Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite has been successfully synthesized by modified one-step salt-assisted coprecipitation process. The Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite was characterized by FTIR, XRD, XPS, SEM, HRTEM, BET and VSM. The results showed that the Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH particles possessed core (Fe 3 O 4 @SiO 2 ) shell (Cl − -LDH) structures and magnetic properties, and Cl − anions were successfully introduced into LDH interlayers. The unique intercalated structure with week interlayer interaction of Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH provide efficient adsorption of methyl orange (MO), Congo red (CR) and methyl blue (MB), leading to its superior performance with much higher uptake capability with the maximum adsorption capacity of MO, CR and MB reaching 733 mg·g −1 , 910 mg·g −1 and 385 mg·g −1 , respectively. The adsorption process could be well described by pseudo-second-order model for MO, CR and MB. The experimental data of MO and CR could be fitted better with Freundlich model, while that of MB were fitted better with Langmuir model. The adsorption process was spontaneous and exothermic for MO and MB, while spontaneous and endothermic for CR. Moreover, the adsorbent exhibits excellent stability and reusability in the regeneration cycle, and a process called ‘‘post-processing step” is proposed to effectively improve the dye removal ability of the adsorbent in reuse. This study puts forward a new thought for the development of high-performance LDH adsorbents with mesoporous and Cl − intercalation structure for the efficient and rapid removal of dyes.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Wenji Zheng,Jingbang Yu,Zhongyue Hu,Xuehua Ruan,Xiangcun Li,Yan Dai,Gaohong He
Layered double hydroxide (LDH) bearing numerous hydroxyl groups shows high affinity with CO 2 and is promising in mixed matrix membranes (MMMs) based CO 2 capture. However, its non-porous structure limits the further improvement of CO 2 permeability. In this work, 3D hollow CoNi-LDH nanocages were developed to construct low-resistance and CO 2 -philic transport channel in MMM by in-situ etching of ZIF-67 template. The resultant material exhibits hollow structure with cavity size of about 500 nm, mesopores and micropores from LDH stacking and ZIF-67 template. The outer layered CoNi-LDH nanosheets can attract more CO 2 molecules by their abundant hydroxyl groups, resulting in an improvement in dissolution selectivity of CO 2 over N 2 . Meanwhile, the tortuous gas diffusion paths originated from 2D nanosheet stacking can further enhance the CO 2 selectivity over N 2 . Moreover, the hollow nanocages provide CO 2 molecules with fast transport path, resulting in high CO 2 permeability. As a result, compared with pure Pebax membrane and 2D LDH/Pebax MMM, all the 3D hollow CoNi-LDH/Pebax MMMs present enhanced CO 2 permeability. The 3D hollow CoNi-LDH-2h/Pebax MMM performs the highest CO 2 permeability of 135.49 Barrer, which are increased by 141.95% and 71.50% than those of the above two membranes, respectively. The selectivity of 3D hollow CoNi-LDH-2h/Pebax MMM is about 26.30% higher than that of the pure Pebax membrane. The present membrane presents comparable CO 2 capture capacity in contrast with most reported Pebax based MMMs and surpasses the Robeson upper bond. Together with the good long-term stability, the 3D hollow CoNi-LDH nanocages are believed to be a promising candidate for MMMs to improve CO 2 capture.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 12
·4853-4861
·
IF 4.569
Jie Bai,Tianning Zhou,Yihao Gao,Meilin Zhang,Xiaofei Jing,Yaqiong Gong
Due to the slow reaction kinetics of the oxygen evolution reaction (OER), the electrolysis rate of water is greatly limited. Therefore, it is of great significance to study stable and efficient non-noble metal based electrocatalysts. In this paper, three-dimensional (3D) spherical V-NiFe LDH@Ni3S2 was developed by exquisitely decorating ultra-thin V-doped NiFe layered dihydroxide (NiFe-LDH) on Ni3S2 nanosheets supported by nickel foam (NF). It is worth mentioning that V-NiFe LDH@Ni3S2 exhibits an excellent electrocatalytic performance and only 178 mV overpotential is required in 1 M KOH to achieve a current density of 10 mA cm−2. Long-term chronoamperometry manifests its superior electrochemical stability. The combination of NiFe LDH and conductive substrate coupling can drastically afford abundant active sites and accelerate charge transfer, and V doping can markedly regulate the electronic structure. Therefore, the activity and durability of the electrocatalysts are greatly improved. This study may provide a new strategy for the preparation of efficient OER electrocatalysts.
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