APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 39
·期 1
·e7942
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IF 3.7
Di Su,Wen Xu,Dongbin Yang,Jiandu Lei,Jing Liu,Chunping Chen,Dermot O'Hare
As a renewable new material with high void ratio, large adsorption surface area, and high adsorption rate, biomass carbon (BC) is a promising adsorbent, which has received wide attention for the degradation of dyes. However, physical adsorption cannot completely remove dyes, and there is also the risk of secondary pollution. ZnAl-layered double hydroxide (ZnAl-LDH) is a semiconductor photocatalyst with abundant active sites and excellent degradation efficiency. In this paper, we have designed a ZnAl-layered double oxide@biomass carbon (ZnAl-LDO@BC) formed by in situ grown LDH on the waste poplar wood as a synergistic adsorption and photocatalytic system. BC as a support could enhance the dispersity of layered double oxide (LDO), whereas LDO could provide photodegradation function to BC. Our studies indicate that the prepared ZnAl-LDO@BC presents lower bandgap energy, higher surface area, and lower complexation efficiency of holes and electrons than delignified biomass (DB). As a result, ZnAl-LDO@BC increased the removal rate of malachite green (MG) to 85.8%, which is 3.5 times higher than DB. The maximum removal rate was close to 98%, and the removal capacity was 1954 mg g −1 under an initial concentration of 200 mg L −1 of MG dye, and the possible mechanism of MG degradation was also investigated. In this study, the conversion of agroforestry wastes into high-value materials applied to dye degradation provides a new pathway for the production of stable, sustainable, and superior photocatalytic material.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Pengfei Yang,Jianhong Bi,Hua Zhang,Zhenyu Wu
Herein, we explored the efficacy of ethylenediaminetetraacetic acid (EDTA) intercalation modified layered double hydroxides (LDHs) composites for removing the anionic dye methyl orange (MO) from aqueous solutions. EDTA intercalated layered hydroxides (EDTA-Mg/Fe LDHs) with a 4:1 Mg/Fe molar ratio have been successfully prepared and thoroughly characterized using SEM-EDS, FTIR, XRD, XPS, UV-Vis and Zeta potential analysis. Batch adsorption experiments were conducted to evaluate the adsorption performance of the innovative adsorbent on MO. The results indicated successful EDTA loading into Mg/Fe LDHs, exhibiting excellent adsorption performance for MO. At pH 6.0, with a 0.03 g adsorbent dose, MO removal exceeded 91.10 % within 90 min, following a pseudo second order kinetic model. The maximum adsorption capacity reached 1207.43 mg/g, fitting well with the Redlich Peterson model. Thermodynamic parameters suggested a spontaneous and favorable adsorption process. Furthermore, we assessed the desorption and regeneration effectiveness of EDTA-Mg/Fe LDHs, emphasizing the importance of developing cost-effective and environmentally friendly adsorbents with practical applications and scientific significance.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Linlin Hao,Jingshuang Yan,Jiaoying Guo,Nannan Wang,Ming Zeng
Swine wastewater is a type of highly turbid wastewater with extremly high concentration of COD, NH 4 + , and total phosphorus. To address the drawbacks of commercial coagulants in the pretreatment of swine wastewater, such as loose flocs, slow settling rates, and the inability to remove NH 4 + , a novel Mg-Fe-Al hybrid magnetic coagulant (Mg/Fe/Al-MC) is prepared by using the high-pressure acid leaching (HPAL) technology based on iron tailings waste. Compared to atmospheric acid leaching (AAL), HPAL significantly increased the iron leaching rate from 22 % to 61 %. The specific surface area was increased from 5.1 to 9.2 m 2 /g. The study revealed the synergistic crystallization-coagulation-adsorption mechanism for the purification of swine wastewater. When the dosage of Mg/Fe/Al-MC was 2.5 g/L and pH was 9.0, the removal efficiency of NH 4 + reached 60 % by forming magnesium ammonium phosphate (MAP). Zeta potential results indicated that the coagulation mechanism of Mg/Fe/Al-MC is primarily based on electrostatic neutralization. After maturing Mg/Fe/Al-MC for 60 h, the content of essential polymeric Fe-Al hydroxide complexes [Fe(III)+Al(III)](b) reached 22.7 %. The insoluble porous particles exhibited a significant adsorption capacity, suggesting its important role in pollutant removal. Under the action of an external magnetic field, the settling velocity of Mg/Fe/Al-MC was significantly faster than that of polyaluminum chloride (PAC), with a much higher clear water yield of 75.5 %. This study provides new pathway for the enhanced pretreatment of swine wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yunkai Liang,Jia Ning,Suli Lan,Bo Chen,Jinlin Zhang,Qian Zhang,Ning Wang,Yunjia Song,Changyi Li,Ying Li
Traumatic oral ulcers, arising from local physicochemical or mechanical stimuli, exhibit considerable discomfort, an extended healing period, and a potential for malignant transformation. Existing etiological treatments mainly include antibacterial therapy and promoting ulcer healing. Nevertheless, antibacterial therapy using antibiotics may cause unexpected side effects and drug resistance. Additionally, commonly used wound-healing drugs, such as growth factors and glucocorticoids, have drawbacks including instability, high cost, and systemic adverse reactions. To address these issues, a magnesium-incorporated photosensitive metal-organic framework (MOF) derivant, denoted as MgO/C, was developed by pyrolysis of Mg-MOF74. The MgO/C was characterized using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The established MgO/C showed an excellent photothermal antibacterial performance upon prevalent oral ulcer pathogens under near-infrared light irradiation, featured by antibacterial rates of 97.8 % and 96.5 % against Streptococcus mutans and Staphylococcus aureus , respectively. Moreover, the MgO/C exhibited controlled release of magnesium ions for up to four days and effectively enhanced fibroblast proliferation, migration and adhesion, at an optimal concentration of 200 ppm. A rat traumatic oral ulcer model demonstrated that the MgO/C+NIR group could facilitate ulcer healing in vivo , resulting in an increase of wound healing rate by 23.4 %, in comparison to the control on day 3. Our study revealed that MgO/C had great potential for the treatment of traumatic oral ulcers.
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DESALINATION
·
2024
·
IF 8.3
Peng Zhao,Fei Guo,Lingfeng Wang,Huange Zhen,Ning Zhang,Shaohua Yin,Guoli Zhou,Xuehua Ruan,Gaohong He,Xiaobin Jiang
Nanofiltration membranes with high selectivity and long-term stability for magnesium and lithium ions are crucial to efficiently enriching lithium resources in salt lake brines. Herein, a nano-gradient-structured nanofiltration membrane was fabricated, in which PEI with different molecular weights and TMC were utilized in a gradient interfacial polymerization process to construct the target active layer. Via this facile strategy, the grafting density of PEI and the amino group introduced were properly adjusted, and the pore size distribution and surface charge of the active layer were optimized. The fabricated active layer simultaneously possesses sub-nanometer pore size with a modified gradient structure and high interfacial positive charges, which can accurately screen lithium and magnesium. The successful grafting of secondary PEI and the high positive charge and continuity of the active layer have been demonstrated. After 150 hour operation (Mg/Li ratio of 50), PEI-70000/PA/PES nanofiltration membrane achieved a lithium‑magnesium separation factor (S Li/Mg ) as high as 150 while maintaining the stable permeation flux of approximately 20 L·m −2 ·h −1 ·MPa −1 , and the terminal Mg/Li ratio on the permeable side falls to 0.32, which exhibits significant potential for extracting Li from salt lake brines with high Mg/Li ratio with promising long-term stability.
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DESALINATION
·
2025
·
IF 9.8
Sehria Zia,Muhammad Kashif,Haojie Ge,Kaiyu Zhao,Yafei Guo,Tianlong Deng
This study investigates the synthesis, characterization and adsorption efficiency of PDMS@Li/ZnAl-LDH as a potential adsorbent for lithium recovery from Salt Lake brine with a high Mg/Li ratio. Synthesized via co-precipitation, the adsorbent exhibited excellent stability across a wide range of pH and temperature, along with a well-defined layered crystalline structure. The maximum adsorption capacity of Li + is 14.1 mg/g in lithium brine and 9.4 mg/g in the Qarhan Salt Lake's brine with impressive selectivity, as indicated by separation factors of 215, 838 and 175 for Li + /K + , Li + /Na + and Li + /Mg 2+ , respectively. Microspheres formed by Li/ZnAl-LDH in ultra-pure water exhibited tunable pore size and porosity as compared to Li/Al-LDH, which enhanced the Li + adsorption. Cyclic adsorption and zinc dissolution tests confirmed the adsorbent's excellent reusability with no significant structural degradation. Furthermore, using NaAlO 2 as a precursor reduces cost, making Li/ZnAl-LDH a viable option for large-scale lithium recovery. This work presents a sustainable, cost-effective strategy for lithium recovery with potential industrial applications.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-12
·
IF 5.3
Shi Zhaoxia,Luo Zhen,Liu Yilu,Liu Zi,Chen Xinyue,Zhang Yintang,Zhou Yanli,Xu Maotian
Four different morphologies of TiO 2 were successfully synthesized and the morphological dependence of the catalytic performance was investigated for monitoring of n -hexane. TiO 2 nanotubes showed the best catalytic performance for the cataluminescence (CTL) reaction of n -hexane because of their high specific surface area and ordered arrangement. To further enhance catalytic activity, a TiO 2 nanotube@Mg-MOF-74 composite was synthesized, which was used to construct a CTL sensor for rapid detection of n -hexane rapidly; the introduction of Mg-MOF-74 improved the adsorption capacity and selectivity. A CTL sensor was constructed based on TiO 2 nanotube@Mg-MOF-74 for the rapid detection of n -hexane, Under the optimal conditions there was a good linear relationship between CTL signal intensity and the concentration of n -hexane in the range 0.20–200.0 mg/L. The detection limit (LOD, S/N = 3) was 0.08 mg/L. The RSD values for 11 consecutive measurements using the same sensor and 7 different sensors were 2.8% ( n = 11) and 3.5% ( n = 7), respectively, demonstrating good repeatability and reproducibility. Finally, the sensor was used to detect n -hexane in air samples from different workplaces, with recoveries ranging from 90.2 to 106.4%, showing good accuracy. Thus, the developed CTL sensor could be used for rapid detection of n -hexane in air, avoiding damage to health caused by excessive inhalation. Graphical abstract
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PubMed
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Yanru Zhu,Zhen Zhang,Yunfei Zou,Jian Zhang,Zhe An,Xin Shu,Hongyan Song,Jing He
Catalytic conversion of biomass-derived 5-(hydroxymethyl)furfural (5-HMF) into carbon-increased hydrocarbons as drop-in energy-rich biofuels has received a great deal of concern for the development of sustainable chemical industry. Here, we demonstrate a one-pot conversion of 5-HMF into C 9 -alkanes on one single catalyst, acidic–basic layered double oxides (Mg(Al)(Zr)O) supported CuCo alloy. The well-defined multifunctional catalytic sites with harmonious combination carry out cascade catalysis, affording C 9 -alkanes (including 30% of more value-added branched-cycloalkanes) in 83% yield. The basic–acidic sites on Mg(Al)(Zr)O show high activity for aldol condensation of 5-HMF and acetone, producing 4-[5-(hydroxymethyl)-2-furanyl]-3-buten-2-one (HAc) in a yield of >99%. The engineered Co–Cu–Co linkages on supported CuCo perform efficient hydrodeoxygenation, affording C 9 -alkanes in a selectivity of 96% from HAc. C 9 -cycloalkanes are generated from the cyclization of the corresponding monohydric alcohol intermediates by the synergy of acidic and CuCo sites in the hydrodeoxygenation reaction.
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CORROSION SCIENCE
·
2024
·
IF 7.4
Fei Gao,En Su,Jiaming Hou,Jiale Wang,Yukun Zhou,Haotian Qin,Zhenhai Xie,Jinlong Mao,Huaiyu Li,Wenjie Tao,Yingqi Chen,Junyu Qian,Guojiang Wan
Long-term corrosion profile of molybdenum was studied in three different simulated body fluids up to 28 days, compared with magnesium, zinc, and iron from the perspective of biodegradable metals (bio-metals). Their corrosion rate, mode, products and surface characteristics were comprehensively fathomed. Strikingly, Mo showed progressively advantageous long-term corrosion behavior with the smallest corrosion rate, and most importantly, more uniform mode, as compared with the other three bio-metals. It also performed bilaterally under the simulated inflammatory and bovine serum protein added conditions, with different corrosion progressions. These findings provide an optimistic outlook in opting molybdenum as a new type of bio-metal.
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RSC Advances
·
2024
·Vol. 14
·期 17
·11992-12008
·
IF 3.9
Xinyu Pan,Jian Pan,Zhuoqun Li,Wenqiang Gai,Guangshun Dong,Min Huang,Lilan Huang
Poly(vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) is considered an ideal membrane material for the treatment of complex environmental water due to its exceptional thermal stability and chemical resistance. Thus, to expand its application in the field of nanofiltration (NF) membranes, in this study, N-methylglucamine (N-MG) was used to hydrophilically modify PVDF-CTFE, overcoming the inherent hydrophobicity of PVDF-CTFE as a porous substrate membrane, which leads to difficulties in controlling the interfacial polymerization (IP) reaction and instability of the separation layer structure. The –OH present in N-MG could replace the C–Cl bond in the CTFE chain segment, thus enabling the hydrophilic graft modification of PVDF-CTFE. The influence of the addition of N-MG on the surface and pore structure, wettability, permeability, ultrafiltration separation, and mechanical properties of the PVDF-CTFE substrate membrane was studied. According to the comparison of the comprehensive capabilities of the prepared porous membranes, the M4 membrane with the addition of 1.5 wt% N-MG exhibited the best hydrophilicity and permeability, indicating that it is a desirable modified membrane for use as an NF substrate membrane. The experiments showed that the rejection of Na2SO4 by the NF membrane was 96.5% and greater than 94.0% for various dyes. In the test using dye/salt mixed solution, this membrane exhibited a good separation selectivity (CR/NaCl = 177.8) and long-term operational stability.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Kun Li,Luxin Liang,Peng Du,Zeyun Cai,Tao Xiang,Hiroyasu Kanetaka,Hong Wu,Guoqiang Xie
Magnesium (Mg) alloys can be regarded as the most promising biodegradable implant materials for orthopedic and stent applications due to their good biocompatibility and low Young's modulus which is near to that of natural bone. However, its applicability is hindered because it exhibits a high corrosion rate in the physiological environments. In this work, we fabricated Mg 66 Zn 30 Ca 4 /Fe bulk metallic glass composites via spark plasma sintering (SPS). We studied the influence of different contents of Fe on the properties of the composites. The results indicated that Fe was uniformly distributed on the surface of Mg 66 Zn 30 Ca 4 metallic glass (MG) as a second phase, which led to an improvement in the corrosion resistance and mechanical strength. The standard potential of Mg 66 Zn 30 Ca 4 /Fe bulk metallic glass (BMG) composites increased as compared to Mg 66 Zn 30 Ca 4 , while their mechanical strength improved from 355 MPa to 616 MPa. Furthermore, cytotoxicity was investigated via the CCK-8 assay and calcein-AM staining, which revealed that the extraction mediums diluted 6 times (EM × 6) of the Mg 66 Zn 30 Ca 4 and Mg 66 Zn 30 Ca 4 /Fe did not cause cell toxicity on day 3 and 5, while the EM × 6 of the Mg 66 Zn 30 Ca 4 showed cytotoxicity on day 1, 3 and 5. Thus, Mg 66 Zn 30 Ca 4 /Fe BMG composites exhibit significant potential for fabricating implants with good mechanical strength and corrosion resistance.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Nian-Dan Zhao,Yan Wang,Xiao-Hang Zou,Wei-Ming Yin,Xin-Yu Wang,Yuan-Ru Guo,Qing-Jiang Pan
The utilization of renewable biomass cellulose in treating pollution of heavy metal ions (HMIs) is one of overarching and appealing strategies, because it simultaneously satisfies sustainable development and resolves ever-increasing environmental issue. In this regard, the composite cellulose@Mg(OH) 2 was prepared via a facile method and explored for its use as water treatment agent. It is demonstrated that the smaller and thinner hexagonal Mg(OH) 2 flakes are constructed onto the cellulose substrate by self-assembling; two components are chemically coupled via hydrogen bonds and Mg-O c (cellulose oxygen) dative bonds; what’s more, the coupling of cellulose with Mg(OH) 2 (1 0 1) facet is much more preferential than with (0 0 1) facet. The resultant composite material shows remarkable HMI removal performance: large capacities of 734.9, 595.8 and 1473.1 mg g −1 for Cd 2+ , Cu 2+ and Pb 2+ , respectively. Further assisted by good shaping property of the cellulose substrate, the composite is capable of being made into filter, which practically separates HMIs and purifies wastewater with high removal efficiency (99.99%) for Cd 2+ even after operating for 110 days and potable water can be obtained. The mechanism is delineated with removal models and characterizations of HMI-recovered products.
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