LANGMUIR
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2025
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IF 3.9
Danli Tang,Dengjie Zhong,Yongxian Zhou,Yunlan Xu,Tanxia Xiang,Wantao Li,Yuanfang Yang,Chunmiao Fan,Jisai Chen
In this study, the magnetic composite catalyst, CuFe2O4 modified Co-Al layered double hydroxide supported by alkali-activated N,S-codoped biochar (CFO/CoAl-LDH@K-NSBC) was developed to activate ozone to degrade methylene blue (MB). The MB degradation efficiency of the CFO/CoAl-LDH@K-NSBC/O3 system was 96.30% in 7 min, and it still remained at 92.85% after 5 cycles. Notably, in the pond water matrix, the degradation efficiency only decreased by 6.44% after five cycles, which confirmed its remarkable stability and application prospects. Electrochemical analysis revealed that the comodification of CFO and CoAl-LDH significantly enhanced the charge transfer and catalytic activity of K-NSBC. The results of material characterization and quenching experiments showed that highly exposed active sites, including oxygen vacancies (Ov), Co3+/Co2+, Fe3+/Fe2+, Cu2+/Cu+, pyridinic N, graphitic N and thiophenic S, synergistically drove O3 activation to generate 1O2, ·OH, and ·O2– to participate in MB degradation, among which 1O2 was the main reactive oxygen species. This study provides a novel approach for the preparation of environmentally friendly biochar-based multimetal oxides with high catalytic activity.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Junnan Tao,Xiaohui Yu,Qinqin Liu,Guiwu Liu,Hua Tang
The requisite interfacial contact of heterojunction photocatalysts has a significant contribution in separation of interfacial charge carriers for photocatalytic hydrogen (H 2 ) evolution in a more efficient manner. Herein, an internal electric field (IEF)-induced S–scheme system comprised of two-dimensional (2D) CoAl layered double hydroxide (LDH) and 2D molybdenum disulfide (MoS 2 ) was constructed via a simple hydrothermal process. In the presence of visible-light irradiation, the 2D/2D MoS 2 /CoAl LDH hybrid demonstrates eightfold greater photocatalytic H 2 generation rate as compared with that of CoAl LDH. The mechanism was investigated in the light of the results of the X-ray photoelectron spectroscopy (XPS) and work-function calculated by density functional theory (DFT) simulation, and the improved activity was ascribed to that the rapid detachment of the electron-hole (e − -h + ) combinations and high redox ability, both are simultaneously realized in MoS 2 /CoAl LDH hybrid with a 2D/2D S–scheme charge transfer mechanism induced by the IEF across interface of the MoS 2 and CoAl LDH. Furthermore, favorable 2D/2D structure and better H* adsorption behavior of MoS 2 /CoAl LDH also promoted the improvement of water reduction performance. This work is a valuable guideline in developing of IEF-induced S–scheme photocatalysts with 2D/2D architecture for improved photocatalytic performance.
研究领域:
材料科学
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能源科学
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催化化学
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PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 13
·1915-1927
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IF 3.1
Yuan Song,Qiang Shen,Guo-Xiang Pan,Chao Ye,Yi-Fan Zhang,Lin Song
CoO and CoAl layered double hydroxide (CoAl-LDH) are both promising active electrode materials for pseudocapacitors. It is of great significance to integrate the advantages of both materials and design ingenious electrode structures to achieve high electrochemical performance. Herein, 3D core–shell CoO@CoAl-LDH nanobouquet arrays on Ni foam were fabricated via two-step hydrothermal growth methods, where CoAl-LDH nanoflakes regularly grew on the surface of CoO nanosheets. The composite exhibits superior specific capacitance (2031.2 F g−1 at 1 A g−1) and desirable cycling stability (88.2% after 5000 cycles at 16 A g−1). Asymmetric supercapacitors (ASCs) devices were also assembled using an as-synthesized CoO@CoAl-LDH composite as a positive electrode and activated carbon (AC) as a negative electrode. The electrochemical test of ASCs provides a specific capacitance of 195.6 F g−1 at 1 A g−1, and the devices retained approximately 85% of the capacitance after 5000 cycles. The ASCs display a high energy density of 69.55 W h kg−1 at a high-power density of 800 W kg−1 and remained at 29.2 W h kg−1 even at a higher power density of 12 800 W kg−1. The electrochemical mechanism was discussed. This work offers a meaningful perspective to explore the possibility of supercapacitor applications of LDH-based materials.
研究领域:
材料科学
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电化学
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Huiling Zhang,Xiaomei Zhou,Longxin Liu,Fujun Lan,Teng Zhao,Mo Qiu,Qingxin Guan,Wei Li
Atomically dispersed cluster catalysts own versatile applications in biomass valorization, while the controllable assembly and microenvironmental regulation remain a crucial challenge. Herein, Co clusters assembled via nanosized ZIF-67 sprouted from Co-Al layered double hydroxide nanoflowers were applied for selective hydrogenation of furfural (FAL). The pyrolysis temperature can tune the microstructures and acid properties of the catalyst, which accounts for the hydrogenation of FAL to furfuryl alcohol (FOL), 2-methylfuran (2-MF), and tetrahydrofurfuryl alcohol (THFOL) with yield of 99.1 %, 96.7 %, and 82.3 %, respectively. The Co clusters favor C O bond adsorption via bridging-type adsorption mode while suppressing the furan ring adsorption. Moreover, ultra-dispersed Co clusters facilitate the cleavage of C-OH bonds in FOL intermediate, leading to a high 2-MF yield. As the pyrolysis temperature increase, the formed Co nanoparticles are conducive to the parallel adsorption of FAL, resulting in the production of THFOL. This work affords a multi-functional catalyst in catalytic biomass upgrading.
研究领域:
催化
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材料科学
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化学工程
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生物质转化
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高影响因子
Journal of Water Process Engineering
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2026
·
IF 6.7
Tariq Ali,Yiwei Li,Yuxian Wu,Yuke Zhang,Bingjie Fang,Saleem Raza,Ruidi Chen,Yeyuan Xiao
Photocatalytic technology offers a promising solution for degrading organic pollutants in wastewater. However, catalysts often suffer from limited light absorption and rapid electron-hole recombination. To address the challenges, we developed a heterogeneous TiO 2 /CoAl-LDH catalyst for photocatalytic degradation of dyes such as Acid fuchsin (AF) and methyl orange (MO) and real wastewater under UV light irradiation. The aligned band structures of TiO 2 and LDH enhanced UV light energy absorption and electron-hole separation, resulting in superior photocatalytic activity. In treating real dyeing wastewater, TiO 2 /CoAl-LDH + H 2 O 2 + UV achieved higher decolorization than UV/H 2 O 2 or catalyst/H 2 O 2 alone under the same operating conditions. The process within the early stage (0–45 min) followed pseudo-first-order kinetics (kₐₚₚ ≈ 1.50 × 10 −2 min −1 ), with a clear H 2 O 2 optimum at 40.8 mM. Excitation–emission matrix (EEM) fluorescence showed rapid quenching of protein-like (B/T) and humic/fulvic-like (A/M/C) peaks with blue-shifts under the TiO 2 /CoAl-LDH + H 2 O 2 + UV condition corroborating deeper oxidation and mirroring the ADMI decolorization trend (fast loss of B/T within 15 min, followed by progressive depletion of humic-like emission). This study presents a simple and cost-effective method for developing efficient hierarchical semiconductor materials potentially applicable as photocatalysts for wastewater treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yi Wang,Xingjian Dai,Quan Zhou,Kailin Li,Li Feng,Weiling Liao,Yaolun Yu,Haoli Yu,Xuanping Zong,Guoxiang Lu,Yuxin Zhang
The preparation of the adsorbent plays an important role in the adsorption technology, especially the selection of adsorbents with high specific surface area and special structure is particularly critical to the entire adsorption process . Herein, a series of ternary LDHs was designed via a facile hydrothermal method , and in another word, all derived from binary CoAl-LDH by substituting with another transition metals(Ni, Zn, Fe), used as adsorbents to remove MO and CR. The adsorption capacity of the obtained ternary LDHs are better than that of the pristine CoAl-LDH, and CoNiAl-LDH stands out with the higher adsorption capacity than other ternary LDHs samples whether the dye is MO or CR. Then the effect of initial dye concentration, pH and temperature on its MO adsorption performance was systematically studied. The maximum adsorption capacity reached more than 330 mg/g under the optimal conditions (25 °C, pH=3). This work may provide a method to design the advanced adsorbents design for further enhancing the adsorption activity in the field of water environmental protection.
研究领域:
环境科学
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材料科学
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Canlin Zhang,Peng Jin,Ting Wang,Minxuan Chen,Zhengyang Fang,Zenghua Sun,Peng Xia
Abstract For the eco-friendly asphalt pavements with NOx degradation performance, TiO2@CoAl-LDHs were prepared and applied as asphalt modifiers. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated that TiO2 was uniformly loaded onto the surface of the CoAl-LDHs, and TiO2@CoAl-LDHs have been successfully synthesized. The integration of TiO2 and CoAl-LDHs reduced the energy barrier for electron–hole pair formation upon light irradiation, resulting in the stronger absorbance of TiO2@CoAl-LDHs in both ultraviolet and visible light ranges. After combining TiO2 with CoAl-LDHs, the photogenerated electron transfer and separation efficiency of TiO2@CoAl-LDHs were significantly enhanced, and the recombination of electron–hole pairs was concomitantly suppressed. Compared with TiO2 and CoAl-LDHs, TiO2@CoAl-LDH-modified asphalt exhibited stronger interaction with NOx. Meanwhile, NOx diffused more easily and had a larger penetration proportion in TiO2@CoAl-LDH-modified asphalt. All of these contributed to better NOx photocatalytic degradation capability of TiO2@CoAl-LDH-modified asphalt. This study promotes the development of eco-friendly asphalt pavements.
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高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Yuchuan Liu,Zongxue Yu,Qiuxiang Wang,Ximei Zhu,Runxuan Long,Xuyang Li
Layered double hydroxides (LDHs) is a typical type of anionic clay minerals. In this study, an SDS-LDH with sodium dodecyl sulfate (SDS) intercalation was prepared by the ion exchange method, and the modified SDS-LDH was successfully combined with graphene oxide (GO). In the presence of dopamine, partial reduction of GO to reduced graphene oxide (RGO). RGO/PDA/SDS-LDH (RPS) composite material was prepared successfully and used in the field of membrane separation . The RPS-2 composite membrane combines the advantages of GO and SDS-LDH, which can increase GO flux while maintaining a high rejection rate. The flux was increased from 10.21 L·m −2 h −1 bar −1 of GO to 79.24 L·m −2 h −1 bar −1 of RPS-2, and the rejection rate of various dyes was above 97%. The rejection rate of methylene blue (MB) 97.34% was maintained after 10 cycles, and its flux loss rate is only 45.32%. The composite membrane had good stability under different pH conditions , which provides a basis for the practical application of the membrane.
研究领域:
材料科学
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环境工程
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jingwen Wei,Ting Liang,Shiming Zhang,Jinhang Yang,Zhihong Li,Zuji Li,Songyu Fan,Zebin Yu,Yanping Hou
In this work, the Z-scheme layered double hydroxide (LDH)/reduced graphene oxide (RGO)/indium vanadate (InVO 4 ) heterojunction was synthesized by a simple hydrothermal synthesis. RGO , with excellent electron mobility, endowed rapid charge migration and separation between the CoAl-LDH and InVO 4 . Various characterizations and tests showed that the LDH/RGO/InVO 4 heterojunction exhibited superior optical properties, and its carriers’ transfer pathway conformed to Z-scheme mechanism. Under visible light illumination, CO was observed to be the main product during photocatalytic CO 2 reduction, and the LDH/RGO/InVO 4 -15 exhibited the highest CO yield of 204.86 μmol g −1 within 2 h, approximately 2.62 times of pristine CoAl-LDH (78.2 μmol g −1 ). In addition, LDH/RGO/InVO 4 -15 showed favorable structure stability and performance stability. In situ fourier infrared spectroscopy (ISFT-IR) analysis demonstrated that the predominant intermediates of CO 2 reduction process were carboxylate (COOH*) and bicarbonate (HCO 3 *). Accordingly, possible pathways of CO 2 reduction to CO were deduced. This work can advance the development of efficient Z-scheme heterojunction photocatalysts for CO 2 reduction.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Tariq Ali,Yiwei Li,Bingjie Fang,Saleem Raza,Yeyuan Xiao
Photocatalysis can decolorize dye-laden wastewaters using light, but practical catalysts often suffer from narrow absorption, charge recombination, and stability limits. Here we synthesize a carbonate-intercalated cobalt–aluminum layered double hydroxide hosting cobalt-oxide nanocluster (CoAl-LDH/CoOx) via a one-pot hydrothermal route and evaluate its performance for dye decolorization and UV/H2O2 treatment of real textile wastewater. Under UV irradiation, CoAl-LDH/CoOx accelerates discoloration of methyl orange (MO) and Congo red (CR), following pseudo-first-order kinetics (e.g., MO: ∼98% removal at 5 mg L−1 in 100 min; CR: ∼100% at 100 mg L−1 in 100 min; kapp up to 0.14 min−1). On real textile wastewater (ADMI0 = 608.1), UV/H2O2 with 0.5 g L−1 catalyst achieved ∼80% American Dye Manufacturer's Institute (ADMI) removal in 120 min at 48.96 mM H2O2; outdoor sunlight tests removed 82.5% (raw influent) and 50.8% (biologically treated effluent) over 20 h. Scavenger tests and EPR spin-trapping implicate h+ and ˙O2− as dominant species under UV, with ˙OH contributing when H2O2 is present. Five-cycle tests indicate stable activity. The one-pot CoAl-LDH/CoOx heterostructure provides a robust, recyclable platform for interfacial charge-transfer-assisted photocatalysis on realistic effluents and motivates follow-up on mineralization and leaching.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Chaowei Liang,Guihua Luo,Xiangyu Meng,Zhijie Wang,Wenxin Dai,Xianzhi Fu
Photocatalytic NO oxidation to nitrate (NO 3 − ) is a promising technology for air pollution control. However, these strategies are hindered by slow kinetics as well as unwanted production of toxic NO 2 , which result from the inefficiency in separating charges and poor activation of the reactant molecules. Here, we report on a novel 2D/2D S-scheme heterojunction constructed by coupling CoAl-layered double hydroxide (CoAl-LDH) nanosheets with BiOBr nanoplates. This particular structure enables a S-scheme charge transfer channel that can improve the separation efficiency of photoinduced charge carrier while keeping strong redox ability to generate high-reactive oxygen species (ROS, including hydroxyl radical and superoxide radicals). Furthermore, in situ DRIFTS spectra showed that Co 3+ sites within the LDH framework are key active centers, significantly enhancing NO adsorption and activation. Consequently, the obtained CoAl-LDH/BiOBr composite exhibited excellent NO removal activity, to reach a conversion rate of 97.3% with negligible NO 2 formation (selectivity <3%) under visible light, and maintained excellent stability for 8 h. This study proposes a synergistic strategy of interfacial charge control coupled with surface catalytic site design, providing new perspectives in design of high-performance catalysts for future applications in environmental protection via photo-catalytic processes.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Aifeng Liu,Yu Zheng,Hongwei Che,Tian Tian,Zengcai Guo,Jingbo Mu,Xiaoliang Zhang,Yanming Wang,Xiaoyan Liu
Layered double hydroxides (LDHs) as electrode materials for supercapacitors still suffer from limited actual specific capacities and unsatisfactory cycling performance owing to their poor intrinsic electrical conductivity and insufficient electroactive sites. Herein, oxygen vacancy (Ov)-rich CoAl-LDH nanosheets are attached onto reduced graphene oxide (rGO) nanosheets to form 2D/2D Ov-CoAl-LDH/rGO sheet-on-sheet heterostructures via a facile precipitation-reduction reaction followed by hydrothermal treatment . The introduction of rich Ov defects in CoAl-LDHs enhances the electrical conductivity, while the attachment of Ov-CoAl-LDH nanosheets on the surface of rGO nanosheets not only reduces the aggregation of Ov-CoAl-LDH nanosheets and thus exposes abundant electroactive sites, but also maintains good structural stability. Theory calculations indicate that the Fermi-level difference of two components triggers interfacial charge separation while creating a built-in electric field at the Ov-CoAl-LDH/rGO interface, which favors rapid electron/ion migration and accelerates charge storage kinetics. The optimized Ov-CoAl-LDH/rGO nanocomposites deliver specific capacities of 984 C g −1 at 3 A g −1 and 708 C g −1 at 20 A g −1 and retain an initial capacity of 90 % after 10,000 cycles at 10 A g −1 . These findings showcase a feasible strategy to endow 2D/2D LDHs/graphene heterostructures with enhanced charge storage performance.
研究领域:
材料科学
·
电化学
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高影响因子
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