COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan
Photocatalysts based on crystallographic effects and visible light-driven tunable nanostructures have been confirmed as a novel, scalable, and easy-to-implement technology. The hydrothermal reaction serves as the main method of synthesis for its novelty, becoming a viable alternative to other complex physical and chemical processes. In this study, hydrothermal conditions' parameters were set for nanostructured Cu 2 O/ZnAl-LDH photocatalysts. The nanostructured I-scheme Cu 2 O/ZnAl-LDH photocatalysts were prepared with an intercalated morphology. The prepared photocatalysts became the most effective photocatalyst for mineralizing and degrading nitenpyram solution, achieved nearly complete degradation and exceptionally high mineralization values (>40%) after 210 min of reaction, and exerted some ex vivo antibacterial, sterilising effects and potential for treating waste leachate (removal = 78%). The synergistic effect of Cu 2 O/ZnAl-LDH with both crystalline surface effect and intercalation structure can lead to reusability, high stability, versatility, and excellent photocatalytic performance in mineralize neonicotinoid pesticides.
研究领域:
环境科学
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材料科学
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农业科学
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DOI
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Gengzhe Shen,Lin Xu,Jing Kong,Chi Tat Kwok,Jingle Wang,Liuyan Zhang,Xiaohua Jie,Zhipeng Sun,De Ning,Zhengjian Chen
In this study, a new Al-LPM composite coating was in-situ deposited on the Al alloy via a facile one-pot hydrothermal method . Morphological and compositional characterizations revealed a tri-layered structure of the Al-LPM coating, namely, zinc aluminum-layered double hydroxide (ZnAl-LDH)/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS)/MoS 2 . ZnAL-LDH was deposited closest to the surface of Al alloy , and the metallic ion-cross-linking of PEDOT:PSS makes the 3D coating more robust. The unique structure endows the coating with superior protective properties against both corrosion and wear. For anti-corrosion, the Al-LPM coating showed very high self-corrosion potential (-0.092 V) and small self-corrosion current density (46.0 μA cm −2 ) (vs. Al substrate with -1.157 V and 354.8 μA cm −2 , respectively), long-lasting high corrosion resistance (>57,000 Ω cm 2 ) during the immersion test, and the almost intact surface morphology and composition after 360 h corrosion. For anti-wear, the friction coefficient of the Al-LPM coating was determined to be < 0.2, which was much smaller than for the Al substrate (> 0.4). Also, there were no serious wear marks and grooves left after the dry-friction test.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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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
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2020
·Vol. 10
·期 24
·14360-14367
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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
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan
The photocatalytic reduction-induced activation of peroxymonosulfate (PMS) presents an eco-friendly and cost-effective approach for oxidatively degrading diverse organic pollutants in water. Nonetheless, the swift reconfiguration of photoinduced electron holes significantly hinders its overall efficiency. In this investigation, we present a novel photocatalytic persulfate activation system based on a ZnAl-LDH catalyst finely tuned by naturally polarized tourmaline (TL) minerals. The composite photocatalysts, TL/ZnAl-LDH, were employed to activate PMS for the simultaneous and efficient degradation of nitenpyram (NTP) and tetracycline hydrochloride (TC). In this system, the TL/ZnAl-LDH composite produced electrons and holes under light excitation. Subsequently, the photogenerated electrons from ZnAl-LDH on the TL surface activated PMS, leading to the formation of SO 4- •. Some of the SO 4- • further reacted with H 2 O/•OH to generate •OH. Ultimately, the NTP and TC were oxidized through the combined action of SO 4- •, •OH and photoinduced holes. Under the optimal conditions in the presence of PMS, TL/ZnAl-LDH degraded completely both NTP and TC within 45 min, with a 17 % mineralization rate. The findings indicate that the polarized electric field of TL not only promoted the separation and migration of electron-holes in ZnAl-LDH but also optimized the electronic structure of ZnAl-LDH. This optimization resulted in enhanced light absorption and improved reduction capacity. This study innovatively developed a system for activating photocatalytic PMS by incorporating naturally polarized minerals. This introduced a novel approach to sustainable and cost-effective advanced oxidation processes for water treatment.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jiangfu Zheng,Xiang Tang,Changzheng Fan,Yaocheng Deng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Jun Luo,Zhuo Chen,Baowei Zhang
In this study, the degradation of nitenpyram (NTP) using Ag@AgCl/ZnAl-LDH (AACMO) material photocatalytically activated peroxymonosulfate (PMS) system was analyzed. As photocatalysts, Ag@AgCl and calcined zinc-aluminum layered double hydroxide (MMO) had high efficiency to achieve the separation of charge. In addition, the electron injection from AACMO to PMS facilitated the production of active species. Through the AACMO/PMS/Vis system, 40 mg/L of nitenpyram (NTP, 50 mL) could be removed in 45 min with the use of 0.8 g/L of photocatalyst and 0.2 g/L of PMS on the basis of optimal reaction conditions and visible light (780 nm > λ > 420 nm). According to electron paramagnetic resonance technology and free radical quenching tests, the removal of contaminants was promoted by 1 O 2 , h + , SO 4 - •, •O 2 – , and •OH. Moreover, the photodegradation of NTP occurring within the AACMO/PMS/Vis system was almost equally effective for the water from four different water bodies. In general, the AACMO/PMS/Vis system had high efficiency and could be employed for the water pollution control in agricultural production.
研究领域:
环境科学
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农业科学
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产品关联
DOI
高影响因子
SOLID STATE SCIENCES
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2022
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IF 3.752
Jyunhong Shen,Antong Shi,Mengfan Wu,Hongyu Zhang,Zhuwu Jiang
For the advanced treatment of micropollutants from wastewater, this study synthesized a ternary Ag/ZnO/ZnAl‒LDH composite photocatalyst with performance optimization based on the Taguchi approach. The optimal synthesis parameters were statistically determined as the Ag doping amount of 5 wt%, Zn 2+ and Al 3+ with a molar ratio of 3:1, Ag/ZnO and ZnAl‒LDH with composite ratio of 3:2, and PEG-200 dosage of 25 mL. The optimally synthesized Ag/ZnO/ZnAl‒LDH achieved the efficient degradation of bisphenol A (BPA) under visible light irradiation, and the reaction rate constant was about 4.8-, 2.2- and 12.0-fold higher than that of ZnO, Ag/ZnO and ZnAl‒LDH, respectively. As proved by various characterizations, the enhanced photocatalytic performance of Ag/ZnO/ZnAl‒LDH can be attributed to the improvements of optoelectronic properties, such as the widened visible light responsivity and facilitated charge transfer, thus resulting in a significant increase of hydroxyl radicals (·OH) formation. Fluorescence measurements and radical quenching experiments indicated that ·OH mainly contribute to the degradation of BPA, and the oxidation of H 2 O by holes was the dominant formation pathway. According to the above results, this study summarized and proposed the enhanced photocatalytic mechanism of Ag/ZnO/ZnAl‒LDH for ·OH production and BPA removal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Fang Chengqian,Liu Wanbing,Dai Yimin,Wang Zhiheng,Li Yaqi,Cai Ling,Liu Bo,Yang Siwen,Wang Junlong,Ding Xianglong,Zhang Yue-Fei,Li Yan,Wan Li
A novel magnetic hierarchically pillared Sep@Fe 3 O 4 /ZnAl-LDH composite was successfully synthesized via co-precipitation methods. The prepared Sep@Fe 3 O 4 /ZnAl-LDH composite were characterized via FTIR, XRD , XPS , SEM, TEM , BET and VSM . The results show that the Sep@Fe 3 O 4 /ZnAl-LDH composite have a hierarchical columnar structure with nanoscale structural unit (Fe 3 O 4 /ZnAl-LDH) and overall micron-scale morphology, and the obtained graded adsorbent has a large pore capacity and pore size distribution . The maximum adsorption capacities of the obtained samples for methyl orange ( MO) and Congo red ( CR) were 430 mg·g −1 and 832 mg·g −1 , respectively. Kinetic data of MO and CR adsorbed on as-prepared samples can well fit with pseudo-second-order model. The isothermal data of MO and CR adsorbed on Sep@Fe 3 O 4 /ZnAl-LDH match well with the Langmuir model. The thermodynamic results indicate that the adsorption process is spontaneous and endothermic. Besides, the adsorbent shows good stability and reproducibility in a reusable cycle. This study demonstrated that Sep@Fe 3 O 4 /ZnAl-LDH provides a new idea for the development of a novel hierarchical magnetic pillared adsorbent for the efficient removal of anionic dyes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Zhi-Heng Lu,Ibrahim Abdelhai Senosy,Dong-Dong Zhou,Zhong-Hua Yang,Hao-Ming Guo,Xiao Liu
In this work, a novel Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite was synthesized by a facile three-step process and utilized as an adsorbent for the removal of azole fungicides from environmental water. The characterization results revealed that double hydroxide (ZnAl-LDH) and metal organic framework (MIL-53) have been successfully tethered to the shell of Fe 3 O 4 . The main factors affecting the removal efficiencies were investigated, and results revealed that Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite possessed high removal efficiencies for azole fungicides. Furthermore, the adsorption mechanism was investigated and including hydrogen-bonding interaction, chemisorption and π–π interaction. The adsorption kinetic was more consistent with the pseudo-second-order kinetic model, and the whole adsorption process could reach the equilibrium within 5 min. Langmuir adsorption isotherm model could describe the adsorption process most accurately, and the maximum adsorption values of azole fungicides were in the range of 43.54–71.79 mg g −1 . Meanwhile, the adsorption thermodynamics indicated that the adsorption process was exothermic and spontaneous. Hence, Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite had a great application potential in the removal of azole fungicides from the environment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Xiuhui Li,Zongxue Yu,Liangyan Shao,Haojie Zeng,Yuchuan Liu,Xiaofang Feng
A novel strategy to construct a visible-light-driven Z-scheme heterojunction catalyst was employed by crosslinking ZnAl-layered double hydroxide (ZnAl-LDH) nanosheets with the active phase on carbon nitride (g-C 3 N 4 ) substrates via a polydopamine bridge (a similar "bridge" structure). In this paper, multiple optical and electrochemical detection methods indicated that the 0.5P-LDH_500CN photocatalyst demonstrated excellent visible-light absorption properties, photo-generated electron-hole separation ability and photocatalytic activity for p-nitrophenol under visible-light (> 420 nm), etc. A Z-scheme charge transfer mechanism via PDA bridge was proposed to achieve heterojunction charge separation. This mechanism involved the recombination of photo-induced electrons directly on the ZnAl-LDH_500 valence band through the PDA channel and the holes were captured at the conduction band energy level of the g-C 3 N 4 . The detection of active species, including O 2 -, h + and OH, further proofed the Z-scheme charge transfer mechanism, which could be speculated that all active species affected the photocatalytic reaction with the order of h + > OH > O 2 -. Meanwhile, this work also exposed that the formation of active phase in ZnAl-LDH could synergize with PDA to promote the application of visible-light-active photocatalysts based on g-C 3 N 4 materials in high-efficiency energy.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Zhuo Zeng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Jiangfu Zheng
In advanced oxidation processes (AOPs) based on peroxynitrite (PMS), generating reactive radicals efficiently and consistently is challenging due to high electron occupancy and slow conversion rates of PMS. In this study, ultrathin In 2 O 3 with oxygen vacancies (Ov) was combined with ultrathin ZnAl-LDH to construct S-scheme In 2 O 3 -Ov/ZnAl-LDH-Ov heterojunctions. The presence of Ov promotes the formation of charge-transfer channels (Al-O-In bonding) at the interface of these heterojunctions, thereby reducing electron occupancy and enhancing the generation of active radicals in the InLDH/PMS/Vis system. This S-scheme heterojunction facilitates the acceleration of photogenerated electrons, leading to the rapid conversion of PMS into hydroxyl (•OH) and sulfate radicals (SO 4 - •), and promotes swift electron transfer. Consequently, the InLDH/PMS/Vis system demonstrates exceptional degradation efficiency for a wide range of organic pollutants and a high removal capacity in treating real industrial wastewater. This investigation offers a novel perspective on the coordination mechanisms between photocatalysis and PMS activation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiangfu Zheng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Xuan Wu
Photocatalysts designed for all-weather applications, capable of efficient charge carrier separation, are set to transform the adoption of photocatalysis-driven advanced oxidation processes in wastewater management. In this investigation, an energy-storing ZnAl-LDH@SrAl 2 O 4 :Eu 2+ , Dy 3+ (SALDH) was synthesized successfully, optimized for the photocatalytic selective degradation of NTP and tetracycline hydrochloride (TC) under varying weather conditions, with 100 % degradation of both NTP and TC within 75 min. Remarkably, SALDH demonstrates energy storage capabilities that markedly reduce energy demands relative to traditional photocatalytic approaches. The primary reactive species identified were O 2 − , and the Fukui index, computed via density-functional theory (DFT), identified the specific interaction sites of O 2 − on NTP molecules. Utilizing the energy retention properties of SALDH, a novel, environmentally friendly device was engineered for processing organic pollutants in agricultural wastewater. This system harness the energy from solar radiation to induce the oxidation of pollutants. The experiments that were performed in the both artificially prepared lab-scale and actual agricultural WWT plants indicated the degradation efficiencies of 36 % and 37 %, respectively. As seen during the day, both SALDH and persulfate were capable of effectively decomposing organic contaminants; at night, the SA’s luminescence maintained the oxidative ability of ZnAl-LDH. Meanwhile, SALDH combines the corrosion resistance of ZnAl-LDH with good metal compatibility, enabling SALDH to effectively improve the photostability of long afterglow. This work contributes to the existing knowledge on the degradation of organic pollutants by efficient photocatalysts and points to possible implementations in water treatment processes.
研究领域:
环境科学
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材料科学
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废水处理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）