CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Wen He,Jizhou Cao,Feiyu Guo,Zhihao Guo,Peiguo Zhou,Rui Wang,Shuang Liang,Qunyan Pang,Bairen Wei,Yue Jiao,Tripti Singh,Qiliang Fu
Heavy-metal pollution is a significant environmental issue that has raised global concern due to its harmful impact on humans and the natural ecosystem. Heavy metal pollution poses several challenges in terms of remediation, including low adsorption capacity and efficiency, scale-up issues and non-degradability. Here, we developed an eco-friendly tunable dual-wavelength absorption mesoporous wood aerogel (TDWA) for removal of Cu 2+ ions from wastewater based on wood nanotechnology and carboxylated functionalization treatment. Nanostructured pores generated from the cell walls with carboxyl groups due to the removal of most lignin/hemicellulose and 2,2,6,6-tetramethylpiperidine oxidation. Mechanical compression was parallelly applied to the transverse direction of TDWA resulted in removing micron-scale cell cavity and intercellular, which significantly improved the dynamic adsorption performance with an excellent Cu 2+ adsorption capacity of 115 mg g −1 . This value is superior to most wood-based adsorption membrane as wastewater mainly flowed through the continuous microfibril network in the cell wall. The double-layer mesoporous TDWA membrane (5 mm) possessed a favorable removal efficiency (99.83 %) even after 5-cyclic adsorption (92.34 %). The invented nanostructured TDWA membrane in the current study has promising potential to substitute the present plastic-based membrane in the realistic Cu 2+ adsorption because of the facile technology, renewability and high removal efficient, as well as the complete biodegradability.
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CHEMOSPHERE
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2023
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IF 8.8
Qinglin Dai,Daohao Li,Yuanyuan Sun,Hu Wang,Yun Lu,Dongjiang Yang
Aerogel has excellent application potential in adsorption, heat preservation, and other areas due to its typical advantages of low density and high porosity. However, there are several issues with the use of aerogel in oil/water separation, including weak mechanical qualities and challenges in eliminating organic contaminants at low temperature. Inspired by cellulose Iα, which has excellent performance at low temperature, this study used cellulose Iα nanofibers extracted from seaweed solid waste as the skeleton, through covalent cross-linked with ethylene imine polymer (PEI) and hydrophobic modification of 1, 4-phenyl diisocyanate (MDI), supplemented by freeze-drying technology to form three-dimensional sheet, and successfully obtained cellulose aerogels derived from seaweed solid waste (SWCA). The compression test shows that the maximum compressive stress of SWCA is 61 kPa, and the initial performance still maintains 82% after 40 cryogenic compression cycles. In addition, the contact angles of water and oil on the surface of the SWCA were 153° and 0°, respectively, and the stable hydrophobic time in simulated seawater is more than 3 h. By combining the elasticity and superhydrophobicity/superoleophilicity, the SWCA with an oil absorption capacity of up to 11–30 times its mass, might be utilized repeatedly for the separation of an oil/water mixture.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 35
·83545-83557
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IF 5.8
Xiong Yehan,Zhou Ting,Bao Jianguo,Du Jiangkun,Faheem Muhammad,Luo Liting
Fenton-like oxidation processes are widely used to degrade recalcitrant organic pollutants, but are limited by narrow application pH and low reaction efficiency. This study investigated the synchronous activation of H 2 O 2 and persulfate (PDS) by sulfidated zero valent iron (S-nZVI) in ambient conditions for Fenton-like oxidation of bisphenol S (BPS), an estrogenic endocrine-disrupting chemical. The activation of S-nZVI induced H 2 O 2 or PDS could be greatly enhanced with the assistance of PDS and H 2 O 2 , respectively, even across a wide range of pH value (3–11). The first-order rate constant of S-nZVI/H 2 O 2 /PDS, S-nZVI/PDS and S-nZVI/H 2 O 2 systems was found to be 0.2766 min −1 , 0.0436 min −1 , and 0.0113 min −1 , respectively. A significant synergy between H 2 O 2 and PDS was achieved when the PDS-H 2 O 2 molar ratio was above 1:1, and where sulfidation promoted iron corrosion and decreased solution pH were observed in the S-nZVI/H 2 O 2 /PDS system. Radical scavenging experiments and electron paramagnetic resonance (EPR) investigations suggest that both SO 4 •− and • OH were generated and that • OH played a crucial role in BPS removal. Furthermore, four BPS degradation intermediates were detected and three degradation pathways were proposed in line with the HPLC-Q-TOF–MS analysis. This study demonstrated that compared to the traditional Fenton-like system, the S-nZVI/H 2 O 2 /PDS system could be a more efficient, advanced oxidation technology capable of being used across a broad pH range for emerging pollutants’ degradation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Xiaotong Shi,Ruihan Gu,Yuxin Guo,Huining Xiao,Kefei Xu,Yuan Li,Chengcheng Li
Natural nanoscale polysaccharide and its application have attracted much attention in recent years. In this study, we report for the first time that a novel naturally occurring capsular polysaccharide (CPS-605) from Lactobacillus plantarum LCC-605, which can self-assemble into spherical nanoparticles with an average diameter of 65.7 nm. To endow CPS-605 with more functionalities, we develop amikacin-functionalized capsular polysaccharide (CPS) nanoparticles (termed CPS-AM NPs) with improved antibacterial and antibiofilm activities against both Escherichia coli and Pseudomonas aeruginosa . They also exhibit faster bactericidal activity than AM alone. The high local positive charge density of CPS-AM NPs facilitates the interaction between the NPs and bacteria, leading to extraordinary bactericidal efficiencies (99.9 % and 100 % for E. coli and P. aeruginosa, respectively, within 30 min) by damaging the cell wall. Very interestingly, CPS-AM NPs exhibit an unconventional antibacterial mechanism against P. aeruginosa , that is, they can induce plasmolysis , along with bacterial cell surface disruption, cell inclusion release and cell death. In addition, CPS-AM NPs exhibit low cytotoxicity and negligible hemolytic activity, showing excellent biocompatibility. The CPS-AM NPs provide a new strategy for the design of next-generation antimicrobial agents that can reduce the working concentration of antibiotics to fight against bacterial resistance .
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Nano Today
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2023
·
IF 17.4
Jianan Yin,Guohe Huang,Huining Xiao,Ning Chen,Chunjiang An,Tzu-Chiao Chao,Renfei Feng,Stuart Read
Treating water resources contaminated by pathogenic microorganisms and heavy metals is a great challenge because of the difficulties in developing efficient strategies for water treatment. Traditional adsorbent materials have the drawbacks of high cost, low adsorption efficiency, secondary pollution creation, and a lack of adaptability in removing a wide variety of pollutants. In this study, inspired by the hierarchical fibrous structure and antibacterial property of the natural silkworm cocoon, we developed a guanidine-functionalized sericin/nanocellulose aerogel (GSNA) with a biomimetic skeletal architecture, which holds great promise for achieving hybrid water disinfection and heavy metal removal. The nanocellulose (CNC) fibers integrated into a robust building block with an interconnected structure and mechanical stability. The grafted polyhexamethylene biguanide (PHMB) endows the biomimetic aerogel with exceptional bactericidal activity (7 log reduction against Escherichia coli within 30 min). Benefiting from the abundant surface functional groups on sericin and CNC-PHMB, the obtained aerogel also exhibits superior heavy metal adsorption capacity (571.5 mg/g for Cu). These compelling merits enable the aerogel to disinfect water and remove heavy metal ions simultaneously as a membrane filter . The synthesized GSNA can be a promising candidate for water disinfection and purification because of its facile preparation, cost-effectiveness, and environmentally friendly characteristics.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Linlin Sun,Xiaoshuo Liu,Yibing Feng,Xunlei Ding,Jigang Wang,Nan Jiang,Shanjiang Wang
A special two-layer coordination configuration anchored single-atom La (SALa) catalyst is synthesized to realize the effective separation of electrons in space and efficient active sites for the activation of O 2 to produce more active species. The special SALa microenvironment is obtained by a novel and facile reduction method that avoids the formation of rare earth oxides and the concentration of loaded SALa (10.34 wt%) exceeds that in most previous studies. The photodegradation test results show that antibiotics are almost completely removed within 30 min by SALa/CN. The first-order kinetic constant of SALa/CN (0.10661 min −1 ) is approximately 9.81 times higher than that of 3DA-CN (0.01087 min −1 ). SALa can be considered as a bridge to transfer electrons and •O 2 − , 1 O 2 and h + are the main active species to degrade tetracycline into some pollution-free small molecules. This work provides an efficient rare earth single-atom catalyst activity strategy possessing certain potential in practical applications.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yunning Chen,Zhengkai Wu,Renquan Guan,Xueying Cheng,Qingkun Shang,Yingnan Sun
Improving the efficiency of photogenerated charge separation and transport is the primary goal of designing and constructing efficient composite photocatalysts. The matching of energy bands and the formation of chemical bond between the two components are very conducive to the separation and transmission of photogenerated charges. Herein, three perylene diimide derivatives (PDIs) are synthesized by introducing sulfonic acid group (PDI-SA) and benzenesulfonic acid (PDI-BSA) respectively into the amide bond and further chlorine bay-substituting (Cl-PDI-BSA). The good water solubility of Cl-PDI-BSA ensures its forms a stable chemical bond with TiO 2 through the sulfonic acid group in the single molecular state, coupled with the matching of energy band structure, TiO 2 @Cl-PDI-BSA exhibited excellent performance upon visible light photocatalytic degradation to phenol and trenbolone acetate (TBA). It can remove 100% of phenol in 15 min and 100% trenbolone acetate (TBA) in 30 min, which is 14.3 times that of TiO 2 . Combining to DFT calculation, Kelvin probe force microscope and EPR analysis prove that bay chlorine substitution has a greater impact on the energy band structure and electron cloud distribution of PDIs than N-sulfonation, thereby seriously affecting the transport of photogenerated carriers with TiO 2 .
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shaowei Wang,Xiaoyue Jin,Yiying Yue,Changtong Mei,Xinwu Xu,Qinglin Wu,Huining Xiao,Jingquan Han
High-performance electronics based on transition-metal carbides/nitrides (MXene) have attracted extensive attention due to their two-dimensional structure, modifiable surface chemistry and excellent conductivity. However, because of the weak interconnections between adjacent nanosheets, the construction of robust and flexible macroscopic MXene-based films for wearable electronics remains a challenge. Herein, mechanically tough, highly electroconductive and multi-photoresponsive films (TTM-Al) with a hierarchical nacre-like structure composed of tannic acid-modified 2,2,6,6-tetramethylpiperidin-1-yloxy-oxidized cellulose nanofibers (TA@TOCNs) and MXene are developed via sequentially bridged hydrogen and ionic bonds. TA@TOCNs with abundant phenolic hydroxyl groups as the intercalation layer can enhance the hydrogen bonding interactions with adjacent MXene nanosheets and improve the dispersibility, film-forming ability, mechanical toughness, as well as the in-plane orientation of MXene nanosheets, which can facilitate the construction of well-aligned “brick and mortar” structure. The ionic bonds induced by aluminum ions and oxygen-containing groups in TA@TOCNs and MXene can not only strengthen the interlocking ability and mechanical toughness of TTM-Al, but also promote the electron transfer and heat conduction between MXene nanosheets. Benefiting from the synergism of sequentially bridged hydrogen and ionic bonds, the optimized ultra-thin TTM-Al (∼40 μm) integrates high mechanical strength (∼118.56 MPa), toughness (∼6.84 MJ m −3 ), electroconductivity (∼5587 S m −1 ), photoelectric response (photosensitivity ∼ 3050%) and fast photothermal conversion capability (saturation temperature up to 181.6 °C in only 20 s) under near-infrared irradiation. The patternable and flexible devices based on polydimethylsiloxane encapsulated TTM-Al demonstrate the tunable photoelectric/photothermal dual response, enhanced mechanical and waterproof properties, delivering an alternative construction strategy for next-generation multifunctional photoresponsive wearable devices.
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FUEL PROCESSING TECHNOLOGY
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2023
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IF 7.5
Fa-Peng Wu,Yun-Peng Zhao,Zong-Pin Fu,Le-Le Qiu,Jian Xiao,Jian Li,Fang-Jing Liu,Jing-Pei Cao
Efficient transfer hydrogenolysis of benzyl phenyl ether (BPE) was accomplished over Ni 1.5 Cu 1.5 /Al 2 O 3 using isopropanol as hydrogen source . The characterization results demonstrated that the formation of NiCu alloy and electron transfer between Ni and Cu were responsible for the excellent catalytic performance. Isopropanol displayed better hydrogen-donating ability than other low-carbon alcohols because of its unique dehydrogenation pathway and small steric hindrance . The results of isotopic experiments elucidated that active hydrogen species for the C O bond cleavage originated from isopropanol rather than H 2 , while both isopropanol and H 2 were responsible for hydrogenation of phenol to cyclohexanol when reaction was conducted with mixed hydrogen sources. A mechanism study illustrated that transfer hydrogenolysis of BPE proceeded through direct cleavage of C O bond followed by phenol hydrogenation, in which the active hydrogen species were in the form of H + and H − .
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Wang Zhenkang,Ji Haoqing,Zhou Jinqiu,Zheng Yiwei,Liu Jie,Qian Tao,Yan Chenglin
Biphasic self-stratified batteries (BSBs) provide a new direction in battery philosophy for large-scale energy storage, which successfully reduces the cost and simplifies the architecture of redox flow batteries. However, current aqueous BSBs have intrinsic limits on the selection range of electrode materials and energy density due to the narrow electrochemical window of water. Thus, herein, we develop nonaqueous BSBs based on Li-S chemistry, which deliver an almost quadruple increase in energy density of 88.5 Wh L −1 as compared with the existing aqueous BSBs systems. In situ spectral characterization and molecular dynamics simulations jointly elucidate that while ensuring the mass transfer of Li + , the positive redox species are strictly confined to the bottom-phase electrolyte. This proof-of-concept of Li-S BSBs pushes the energy densities of BSBs and provides an idea to realize massive-scale energy storage with large capacitance.
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ACS Applied Polymer Materials
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2023
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IF 5
Boyuan Chen,Hui Zhang,Lijuan Li,Yingcheng Hu
Nano-cellulose aerogels have low densities, high porosities, and strong absorption capacities, making them suitable for cleaning up oil and chemical spills in oceans. However, their weak lipophilicity and poor mechanical properties often limit their applications. We attempted to introduce long-chain polymers on the nanocellulose/polyvinyl alcohol (CNF/PVA) surface for the hydrophobic modification of aerogels. In this paper, PVA/CNF was silylated by introducing hydrolyzed ethyltrimethoxysilane to increase its hydrophobicity. Aerogels with interpenetrating pore structures were prepared by a directional freezing method. The aerogels had a high strength in the freezing direction and high compressive elasticity in the direction perpendicular to the freezing direction. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and water contact angle (148°) tests demonstrated the successful silylation of the aerogel surface. The aerogel absorbed oil and some organic solvents 50–110 times higher than its own weight. It showed good reusability, with an absorption loss rate of 20% after 40 squeezing cycles. This green and sustainable method is inexpensive and has a short production cycle. In addition, the absorption of alcohols and lipids by aerogels can be used as a carrier for surgical drugs.
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CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Hua Jin,Lin Zhu,Xinyuan Xu,Xiaoyang Yu,Xiaoshu Qu,Zhigang Liu,Yanyan Yang,Yan Gao,Qingling Wei
Herein, we investigated the synergistic degradation of p -chlorophenol by a Ag 3 PO 4 /Fe 3 O 4 /graphene oxide visible light – peroxydisulfate coupled system, probed the effects of catalyst and peroxydisulfate dosage, pH, operating mode, and coexisting substances, identified decomposition intermediates, and proposed plausible degradation pathways. The advantages of the coupled system, namely reduced agent dosage and efficient and thorough degradation, justified the involvement of a precious metal (Ag), while mechanistic investigations suggested the importance of the peroxydisulfate peroxo bond and electron transfer between multivalent metal catalyst components for degradation performance enhancement. Thus, this work facilitates the development of high-efficiency and low-cost combinations of advanced oxidation processes.
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