JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Fengyuan You
The construction and precise synthesis of materials based on functional and structural orientations have emerged as a pivotal platform in the field of environmental management. In this paper, an efficient and stable catalyst (RuLDH) was constructed to achieve this goal. RuLDH comprises individual Ru atoms that are uniformly dispersed on ZnAl-LDH, achieved by room temperature stirring. Remarkably, RuLDH exhibits exceptional performance under visible light, effectively triggering the photocatalytic degradation of tetracycline hydrochloride (TC) via peroxymonosulfate (PMS) with a remarkable efficiency of 100%, all while avoiding the generation of highly toxic intermediates. In addition, RuLDH0.2 demonstrated its utility in fluorescence detection of TC, showcasing commendable analytical performance characterized by rapid response, low detection limit, and robust resistance to environmental interferences (with a detection limit of 1.0 mg/L). Notably, the RuLDH0.2/PMS/Vis system exhibited remarkable efficacy in treating actual pesticide wastewater, effectively exerting bactericidal and disinfectant effects. This study serves as a source of inspiration for the design of multifunctional single-atom catalysts, thereby pushing the boundaries of "integration of diagnosis and treatment" in environmental management and control.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Xinzhu Wen
It is crucial for the storage and conversion of hydrogen energy to substitute the low theoretical potential of urea oxidation reaction (UOR) for the high theoretical potential of anodic water electrolysis (oxygen evolution reaction (OER)). In this paper, it puts forward a brief and scalable strategy, so as to synthesize a novel bifunctional nickel-iron layered double hydroxide and multi-walled carbon nanotube composites supported on Ni foam, represented as NiFe-LDH/MWCNTs/NF. Electrochemical measurements demonstrate that NiFe-LDH/MWCNTs/NF is able to realize an efficient electrocatalysis for UOR. During this process, merely a potential of 1.335 V is needed at 10 mA cm −2 , which can be taken to replace OER, thus reducing overpotential in H 2 -production as well as power consumption . In addition, NiFe-LDH/MWCNTs/NF also exhibits electro-defense electrocatalytic efficiency to achieve the reaction of hydrogen evolving process, which provides a low overpotential of 98 mV at 10 mA cm −2 . To further prove it, all-water-urea electrolysis measurement is carried out in 1 M KOH and 0.5 M Urea with NiFe-LDH/MWCNTs/NF as cathode and anode respectively. NiFe-LDH/MWCNTs/NF||NiFe-LDH/MWCNTs/NF electrode manages to provide 10 mA cm −2 at a voltage of merely 1.507 V, 156 mV lower than that of water splitting, which proves its commercial viability in energy-saving hydrogen production .
研究领域:
能源材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 5
·994-1005
·
IF 7.779
Linfen Peng,Changqiang Yu,Yuheng Ma,Guanshun Xie,Xiuqiang Xie,Zhenjun Wu,Nan Zhang
Transition metal chalcogenides (TMCs) have been well-established as ideal low-dimensional systems for photocatalytic hydrogen evolution. Strategies toward improving the activity of these TMC photocatalysts by crafting heterostructures have been intensively studied. In this study, a two-dimensional (2D) CoAl layered double hydroxide (CoAl-LDH) has been assembled on 2D TMCs (CdIn2S4, In2S3, and ZnIn2S4) to construct novel 2D/2D heterostructures by a facile electrostatic assembly method. The intimate interaction at the interface of hybrids and the suitable energy level alignment enable an efficient pathway for electron transfer to improve the photoactivity. Experimental results show that the photocatalytic activity of the CdIn2S4@CoAl-LDH hybrids for H2 production is about 4.3 times higher than that of CdIn2S4 nanosheets under visible-light irradiation. The effect of 2D CoAl-LDH on enhancing the photoactivities of In2S3 and ZnIn2S4 by similarly constructing 2D heterostructures has also been determined. This work establishes a foundation to construct 2D TMC-based heterostructures using CoAl-LDH nanosheets toward enhanced photoredox activity.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 24
·14360-14367
·
IF 3.119
Trinh Dinh Dinh,Dongxiang Zhang,Vu Ngoc Tuan
The effective adsorption of radioactive iodine is greatly desirable, but is still a significant challenge. In this manuscript, we report the synthesis of a bismuth-modified zinc aluminium layered double hydroxide (BiZnAl-LDH) via a co-precipitation method for the highly efficient absorption of iodine. Based on the robust chemical attraction between Bi and I2, BiZnAl-LDH exhibited highly effective iodine capture. Furthermore, to evaluate BiZnAl-LDH as an effective sorbent, it was characterized via X-ray powder diffraction (XRD), scanning electron microscopy-energy dispersion spectroscopy (SEM-EDS), and Fourier-transform infrared spectroscopy (FITR). In addition, to determine the morphology and iodine adsorption properties of BiZnAl-LDH, several studies were conducted. Through experiments, its elemental composition and vibration before and after iodine adsorption were analyzed via EDS and X-ray photoelectron spectroscopy (XPS). During the capture process, I2 is reduced to I− by the intercalated Bi3+ via chemical adsorption, and the maximum adsorption capacity of BiZnAl-LDH for iodine reached up to 433 mg g−1, which had a surface area, average pore diameter, and pore volume of 36.259 m2 g−1, 2.374 nm, and 0.128 m3 g−1, respectively. Compared with several previous sorbents for iodine adsorption, BiZnAl-LDH exhibited an iodine adsorption of approximately two times that of the commercial Ag-exchange zeolite X, and furthermore BiZnAl-LDH is cost-effective. Thus, the substantial iodine capture by BiZnAl-LDH indicates that it is a capable sorbent for the effective elimination of radioactive iodine from reprocessing plant emissions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Lanyu Qi,Guofeng Ma,Ronghui Kou,Ziyao Wang,Hongling Zhang,Yanhong Yang
The Fenton-like process is a highly efficient and widely applied advanced oxidation technology for degrading organic pollutants under dark conditions. However, its development is limited by low H 2 O 2 utilization, incomplete mineralization, and limited optimal pH range. We developed a CoAl-LDH/porous g-C 3 N 4 catalyst via high-temperature thermal polymerization with NH 4 HCO 3 as a dynamic gas template and urea as a precursor. The reaction rate constant of CoAl-LDH/porous g-C 3 N 4 -H 2 O 2 system for degradation of Rhodamine B is 0.0199 min −1 , which is about 1.58 times that of the CoAl-LDH-H 2 O 2 system. Moreover, the catalyst sustained performance over four cycles and maintained high activity in degrading three different substrates. The high catalytic activity is attributed to the rich porous structure of g-C 3 N 4 , the presence of abundant active sites, and the synergistic interaction between the CoAl-LDH and g-C 3 N 4 , which promotes the generation of ·OH, 1 O 2 , ·O 2 − , facilitating pollutant degradation. This study highlights the potential of this CoAl-LDH/porous g-C 3 N 4 -based Fenton-like system for applications in dye wastewater treatment.
研究领域:
环境科学
·
催化材料
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yinke Wang,Lujun Wang,Zixin Xiao,Shichao Liu,Jun Hu,Xinqi Long,Lixu Wu,Chun Sun,Kangbo Chen,Feipeng Jiao
A novel (BiO) 2 CO 3 /ZnFe-LDH photocatalyst was fabricated via a simple hydrothermal method for degradation of tetracycline aqueous solution. Due to the unique band structures of (BiO) 2 CO 3 and ZnFe-LDH, the combination of these two materials formed a Z-scheme heterojunction, which was conducive to the separation of photo-generated carriers. Through measuring the absorbance, it was found that the composite with 5% ZnFe-LDH has the optimal photocatalytic performance among all the samples. 98.09% of tetracycline (TC) was degraded after adsorption for 30 min and light irradiation for 90 min. In addition, the (BiO) 2 CO 3 /ZnFe-LDH composite displayed a remarkable reusability and stability in five successive runs. Based on the results of characterization and performance, a possible photocatalytic mechanism was proposed. This work would be helpful for the application of composites in the field of photocatalysis .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Huanling He,Shiwen Lv,Ying Kang,Jiaxin Yi,Yi Zhang,Yanqing Cong
Herein, for the first time, a self-supported electrode for simultaneous determination of hydroquinone (HQ) and catechol (CA) was synthesized by loading NiCoFe-layered double hydroxide nanoflowers on hydrophilic carbon cloth (NiCoFe-LDH NFs/CC) with a simple hydrothermal method. By combining the advantages of NiCoFe-LDH NFs with hydrophilic carbon cloth such as good conductivity, 3D porous network structure, high electrocatalytic activity, and fast electron transport, the proposed NiCoFe-LDH NFs/CC electrode dispalyed good electrochemical activity for detecting HQ and CA. The binder-free and free-standing electrode based on NiCoFe-LDH NFs/CC possessed good linear range (5–200 μM), low determination limit (0.15 μM and 0.11 μM), and strong selectivity. Furthermore, it also showed good electrochemical stability without obvious change in ten days. More importantly, as-prepared electrode could be used as an efficient electrochemical sensor to determine HQ and CA content in actual samples with good recovery rate, revealing its feasibility in potential application.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Fengzhan Si,Yan Zhang,Yue Liang,Xiaomin Kang,Jianwen Liu,Xian-Zhu Fu,Jing-Li Luo
Water decomposition is the most promising system for developing renewable energy, but the sluggish kinetics of the oxygen evolution reaction (OER) is the key limiting factor. Recently, inorganic nanomaterials have been widely used as an effective catalyst for the stimulation of OER kinetics, for which the subsequent dispersion and the current collector are essential. We present a three-dimensional NiFe-layered double hydroxide (NiFe-LDH) synthesized by electrochemical corrosion , with increased electrochemical performance for electrocatalytic water splitting. Electrochemical measurements reveal that the NiFe-LDH has a lower Tafel slope of 46 mVˑdec −1 compared with the NiFe foam. The resulting electrode had a current density of 50 mAˑcm −2 and a remarkably low overpotential of 150 mV. Theoretical calculations and experimental observations showed and explained NiFe-LDH-90 electrode has high alkaline medium endurance, implying excellent OER electrocatalytic activity . The produced composite is expected to bring new insights into the design of foam electrocatalyst materials for OER.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zetian He,Tie Shi,Daimei Chen,Yuxin Wang,Yanmei Feng,Fengshan Zhou,Yilei Li
The extensive use and improper disposal of antibiotics and organic dyes have resulted in their substantial release into the natural environment, posing a grave threat to both the ecological system and human health. This study successfully synthesised an ultra-thin CuZnCr layered ternary hydrotalcite (CuZnCr-LDH) nanosheet, exhibiting remarkable photo-Fenton properties, through a streamlined one-step coprecipitation method. When the ratio of Cu + to Zn 2+ is 2:1, methylene blue (MB) degradation efficiency reaches 96.5 % after 70 min, and that of CIP attains 75 % after 3 h, and the mineralization rate can be as high as 81.3 % and 64.7 %. The key to enhancing its performance is that the ultrathin structure is conducive to carrier migration, a large number of photogenerated electrons are conducive to the recovery of valence states of Cu and Cr ions to promote Fenton reaction cycle, and the rich active species actively participate in the reaction. Furthermore, electron paramagnetic resonance (EPR) signaling and active material capture experiments have shown that photogenerated superoxide radicals (‧O 2 - ), hydroxyl radicals (‧OH) and holes (h + ) as active species play a crucial role in the degradation process. And the cyclic pattern of the high-priced metal was verified by X-ray photoelectron spectroscopy (XPS) testing, which is a key factor in the photo-Fenton synergy. Based on the experimental results, the photo-Fenton degradation mechanism is proposed. This study holds important promise in addressing the pressing problem of water pollution caused by antibiotics and organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shirui Wang,Jianping Deng,Menghan Li,Jiande Lin,Lu Luo,Zhanhui Yuan,Wenxue Zhang,Cheng He,Guanben Du,Weigang Zhao
This study demonstrates the synthesis and application of nitrogen-doped tannin carbon dots (TCDs) derived from condensed tannin of grapestone through a single-step hydrothermal method. The TCDs were employed to enhance the electrical conductivity, active site availability, structural stability, and charge storage mechanisms of NiCo-LDH composite electrodes. Density Functional Theory (DFT) calculations reveal that the incorporation of TCDs increases the density of states (DOS) near the Fermi level, thereby improving charge transport properties and contributing to the enhanced cycling stability. In a three-electrode system, the NiCo-LDH@TCDs 3.0 electrode exhibits an exceptional specific capacitance of 1804.2F g −1 at 1 A g −1 , with a capacitance retention of 77.4 % at a high current densities of 10 A g −1 . As button cell of asymmetric supercapacitor (ASC) assembled with tannin-based activated carbon (TAC600-4) as the negative electrode and NiCo-LDH@TCDs 3.0 as the positive electrode, the device demonstrates a maximum energy density of 87 Wh kg −1 at a power density of 800 W kg −1 , and maintains a high energy density of 61.6 Wh kg −1 even at an ultra-high power density of 8000 W kg −1 , significantly surpassing devices composed solely of NiCo-LDH. Durability assessments further revealed 78.6 % capacitance retention and 100.9 of coulombic efficiency after 10,000 cycles, underscoring its applicability in high-performance energy storage. This study not only advances the synthesis of carbon dots from sustainable tannin sources but also provides valuable insights into optimizing the specific capacitance, rate capability, and cycling durability of LDH-based supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qiangli Lv,Haoran Guo,Duo Xu,Yuling Zhai,Hua Wang,Tao Zhu,Xing Zhu,Kongzhai Li,Zhihong Yang,Zhishan Li
The urea oxidation reaction (UOR) is considered as an alternative to the oxygen evolution reaction for high-efficiency hydrogen production, because it can simultaneously achieve wastewater treatment and hydrogen production. However, the slow kinetics of the UOR hinder its widespread adoption due to relatively complex molecule, it is urgent to rational design and preparation of high-performance UOR catalysts. Herein, we report a simple synthesis of the NiMn-LDH@Rh(OH) 3 heterostructure and a systematic investigation of urea-assisted electrolytic hydrogen production， significantly enhances the efficiency of urea electrolysis. The amorphous Rh(OH) 3 structure provides a higher density of active sites and greater catalytic surface exposure, while the synergistic interaction between Rh(OH) 3 and NiMn-LDH improves both electrical conductivity and catalytic performance. The catalyst of NiMn-LDH@Rh(OH) 3 –3 requires only 1.29 V overpotential to achieve a current density of 10 mA cm −2 in a 1.0 M KOH and 0.33 M urea solution, surpassing other catalysts. Furthermore, it demonstrates remarkable stability with minimal potential increase during 48-hour chronopotentiometric tests at 100 mA cm −2 . This work making the developed strategy promising for the rational design of highly active electrocatalysts for green hydrogen production and the treatment of urea-rich wastewater.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Wujian Zhang,Yue Meng,Yuhua Liu,Hui Shen,Zheming Ni,Shengjie Xia,Wenfeng Han,Ying Li,Haodong Tang
In this work, LaOCl/LDH Z-scheme heterojunction catalyst containing oxygen vacancies were successfully constructed and used for photodegradation of norfloxacin (NOR). The results showed that the removal rate of NOR by LaOCl/LDH was up to 90%, and the reaction rate constant was 2 times than LaOCl and LDH. By exploring factors affecting the photodegradation performance, including pH, catalyst dosage, light intensity and reaction time, the kinetics of the degradation process were investigated in detail. It indicates that the formation of Z-scheme heterojunction enhanced the separation and transfer of photogenerated carriers and enhanced the redox capacity of photocarriers. DFT calculation shows that the oxygen vacancies on LaOCl promoted the absorption of visible light and effectively adsorbing and activating small molecules. In addition, based on LC-MS results, intermediates and a possible pathway for NOR degradation were proposed. The synergistic effect of Z-scheme heterojunction and oxygen vacancies enhanced the photodegradation property of LaOCl/LDH for NOR, which provides a reference for constructing highly efficient photocatalysts.
研究领域:
环境科学
·
材料科学
✓ 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）