ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Feng-Ping Wang,Jing-Jing Li,Yu Zhang,Mei-Yan Sun,Li Li,Fazli Wahid,Yan-Yan Xie,Shiru Jia,Wenchao Li,Cheng Zhong
The cellulose dissolution is conducive to converting it into higher value-added cellulose products. However, conventional cellulose solvents possess several drawbacks, such as high cost and harsh reaction conditions. In this study, a new strategy that combined 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation and a zincate–NaOH system was proposed for cellulose solubilization. The results showed that TEMPO-mediated oxidation increased the hydrophilicity of cellulose, destroyed the surface and amorphous areas of the fiber, and facilitated solvent access to its crystalline regions in the subsequent treatment. Zn(OH)42– can be used as a stabilizer to prevent cellulose from agglomeration and form strong hydrogen bonds with cellulose to enhance cellulose dissolution. All-cellulose composites with antibacterial properties were prepared from cellulose using a partial dissolution method at room temperature. This preparation is simple and low cost, laying the foundation for its application in biomedicine.
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Energy & Environmental Materials
·
2022
·Vol. 6
·期 5
·e12426
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IF 13.443
Xuefeng Zhu,Rui Lin,Hao Gu,Huichao Hu,Zheng Liu,Guichuan Xing,Yibing Wu,Xinhua Ouyang
Perovskite solar cells (PSCs) have been demonstrated to be one of the most promising technologies in the field of renewable energy. However, the presence of the defects in the perovskite films greatly limits the efficiency and the stability of the PSCs. The additive engineering is one of the most effective approaches to overcome this problem. Most of the successful additives are extracted from the petroleum-based materials, while the research on the biomass-based additives is still lagging behind. In this paper, two ecofriendly hydroxyalkyl cellulose additives, i.e., hydroxyethyl cellulose (HEC) and hydroxylpropyl cellulose (HPC), are investigated on the performance of the MAPbI 3 -based inverted PSCs. Due to the strong interaction between the hydroxyl groups of the cellulose and the divalent cations of the perovskite, these additives enhance the crystal grain orientation and significantly repair the defects of the perovskite films. Working as the additives, these two cellulose derivatives show a strong passivation ability, which significantly reduces the trap density and improves the optoelectronic feature of the PSCs. Compared with the average power conversion efficiency (PCE) of the control device (19.19%), an enhancement of ~10% is achieved after the addition of HEC. The optimized device (PCE = 21.25%) with a long-term stability (10:80 h, PCE = 20.93%) is achieved by the incorporation of the HEC additives into the precursor solution. It is the best performance among the PSCs with the cellulose additives up to now. This research provides a novel choice to develop a cost-effective and renewable additive for the PSCs with high efficiency and excellent long-term stability.
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CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Xi Chen,Yong Huang,Lijiaqi Zhang,Jinfeng Liu,Chao Wang,Min Wu
It is challenging to build a superhydrophobic coating with aqueous dispersions since hydrophobic substances are usually dispersed in pure organic or water/organic mixed solvents. In this study, hydrophobic SiO 2 nanoparticles were dispersed in water assisted with cellulose nanofiber (CNF) and the superhydrophobic surface was manufactured by coating a waterborne dispersion composed of CNF, hydrophobic SiO 2 nanoparticles and methyltrimethoxysilane (MTMS). It was found that the dispersion of SiO 2 in water can be improved by CNF. Meanwhile, the coated paper surface retained its hydrophobicity after 10 abrasion cycles due to the adhesion of the coating surface promoted by MTMS. When SiO 2 content over 0.25 wt%, the coated paper surface displayed a superhydrophobic property, and the moisture absorption decreased to 31–34%. The contact angle of the coating surface was 162°, the contact angle hysteresis was 1.96° and the rolling contact angle was 1.33° when SiO 2 content was 1 wt%.
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Catalysts
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2022
·Vol. 12
·期 1
·83
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IF 4.501
Cuiping Yu,Weilong Wu,Min Gao,Yu Liu
Asymmetric catalysis is the preferred method for the synthesis of pure chiral molecules in the fine chemical industry. Cellulose has long been sought as a support in enantioselective catalysis. Dialdehyde cellulose (DAC) is produced by the selective oxidation of cellulose and is used to bind 5,5′-diamino Binap by forming a Schiff base. Here, we report the synthesis of modified cellulose-supported Rh as a novel biomass-supported catalyst and the characterization of its morphology, composition, and thermal stability. DAC-BINAP-Rh was a very effective catalyst in the asymmetric hydrogenation of enamides and could be easily recycled. This work provides a novel supported catalyst that broadens the applications of cellulose in asymmetric catalysis.Keywords:asymmetric hydrogenation;cellulose;BINAP;heterogeneous catalysis
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ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Hongliang Ma,Xia Li,Jiang Lou,Yujie Gu,Yang Zhang,Yifei Jiang,Heli Cheng,Wenjia Han
Humidity sensors have been widely used for humidity monitoring in industry and agriculture fields. However, the rigid structure, nondegradability, and large dimension of traditional humidity sensors significantly restrict their applications in wearable fields. In this study, a flexible, strong, and eco-friendly bacterial cellulose-based humidity sensor (BPS) was fabricated using a two-step method, involving solvent evaporation-induced self-assembly and electrolyte permeation. Rapid evaporation of organic solvent induces the formation of nanopores of the bacterial cellulose (BC) surface and promotes structural densification. Furthermore, the successful embedding of potassium hydroxide into the sophisticated network of BC effectively enhanced the sensing performance of BPS. The BPS exhibits an excellent humidity sensing response of more than 103 within the relative humidity ranging from 36.4 to 93% and strong (66.4 MPa) and high flexibility properties owing to the ultrafine fiber network and abundant hydrophilic functional groups of BC. Besides being strong and thin, BPS is also highly flexible, biodegradable, and humidity-sensitive, making it a potential candidate in wearable electronics, human health monitoring, and noncontact switching.
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CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Shuanglin Wu,Jiayi Shi,Xiaolin Nie,Zhifeng Yu,Fenglin Huang
High-energy density lithium sulfur battery containing highly active materials is more prone to safety hazards. Besides, the infamous shuttle effect of lithium polysulfides (LiPSs) and listless redox kinetic limit its practical applications. Here, a “one-for-all” design concept for separator enabled by interfacial engineering is proposed to relieve the bottlenecks. For one thing, porous bacterial cellulose (PBC) membrane with high thermostability (no shrinking at 200 °C) and puncture resistance was employed to ensure the battery's safety. For another, a difunctional Ti 3 C 2 T x -SnS 2 modified layer could capture LiPSs through lewis-acid interaction and promoted the redox kinetics by catalytically active sites. The symmetric cell with anchoring-electrocatalysis Ti 3 C 2 T x -SnS 2 -PBC separator infiltrated with the electrolyte delivered an ionic conductivity of 2.171 mS/cm at a high temperature of 180 °C. And a capacity retention is improved by 71.2% compared with PP separator. This work furnishes a facial engineering strategy for manufacturing a multifunctional separator for lithium sulfur batteries.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Danning Fu,Ruibin Wang,Yang Wang,Qianyu Sun,Chen Cheng,Xiaohui Guo,Rendang Yang
To date, flexible pressure sensors built on silver nanowires (AgNWs) have attracted tremendous attention, owing to their versatile applications in wearable, human-interactive, health-monitoring devices. Cellulose and its derivatives, which show great promise in serving flexible pressure sensors as the desired substrate due to their natural abundance, biocompatibility, easy processibility, and low costs. Herein, we reported a rational strategy to design a silver nanowires-dual-cellulose conductive paper. Its morphology, chemical and crystal structures, thermal stability , mechanical performances, and electrical properties were carefully studied. The results suggested that good tensile properties (tensile strength ≤8.10 MPa), high electrical conductivity (≤ 1.74 × 10 4 S·m −1 ) with long-term stability, and good adhesion stability (bending cycles over 500) were obtained. Furthermore, the use of such conductive paper as substrate for versatile flexible pressure sensors was demonstrated, which exhibited fast response (~ 0.48 s) and high sensitivity, in response to finger motion, voice recognition, and human pulse, etc.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 1
·160
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IF 5.719
Rongrong Si,Yehong Chen,Daiqi Wang,Dongmei Yu,Qijun Ding,Ronggang Li,Chaojun Wu
In the present study, carboxymethyl cellulose nanofibrils (CMCNFs) with different carboxyl content (0.99–2.01 mmol/g) were prepared via controlling the ratio of monochloroacetic acid (MCA) and sodium hydroxide to Eucalyptus bleached pulp (EBP). CMCFs-PEI aerogels were obtained using the crosslinking reaction of polyethyleneimine (PEI) and CMCNFs with the aid of glutaraldehyde (GA). The effects of pH, contact time, temperature, and initial Cu2+concentration on the Cu2+removal performance of CMCNFs-PEI aerogels was highlighted. Experimental data showed that the maximum adsorption capacity of CMCNF30-PEI for Cu2+was 380.03 ± 23 mg/g, and the adsorption results were consistent with Langmuir isotherm (R2> 0.99). The theoretical maximum adsorption capacity was 616.48 mg/g. After being treated with 0.05 M EDTA solution, the aerogel retained an 85% removal performance after three adsorption–desorption cycles. X-ray photoelectron spectroscopy (XPS) results demonstrated that complexation was the main Cu2+adsorption mechanism. The excellent Cu2+adsorption capacity of CMCNFs-PEI aerogels provided another avenue for the utilization of cellulose nanofibrils in the wastewater treatment field.Keywords:carboxymethylation;cellulose nanofibrils;aerogel;adsorption
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CARBOHYDRATE POLYMERS
·
2023
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IF 11.2
Xiaoli Tang,Zhuqun Wang,Maosen Wang,Shuyu Zhou,Jinghua Chen,Shuqin Xu
Demyelination is a serious complication of neurological disorders, which can be reversed by oligodendrocyte precursor cell (OPC) as the available source of myelination . Chondroitin sulfate (CS) plays key roles in neurological disorders, which still attracted less attention on how CS modulates the fate of OPCs . Nanoparticle coupled with glycoprobe is a potential strategy for investigating the carbohydrate-protein interaction. However, there is lack of CS-based glycoprobe with enough chain length that interact with protein effectively. Herein, we designed a responsive delivery system, in which CS was the target molecule, and cellulose nanocrystal (CNC) was the penetrative nanocarrier . A coumarin derivative (B) was conjugated at the reducing end of an unanimal-sourced chondroitin tetrasaccharide (4mer). This glycoprobe (4B) was grafted to the surface of a rod-like nanocarrier, which had a crystalline core and a poly(ethylene glycol) shell. This glycosylated nanoparticle (N4B-P) displayed a uniform size, improved water-solubility, and responsive release of glycoprobe. N4B-P displayed strong green fluorescence and good cell-compatibility, which imaged well the neural cells including astrocytes and OPCs. Interestingly, both of glycoprobe and N4B-P were internalized selectively by OPCs when they were incubated in astrocytes/OPCs mixtures. This rod-like nanoparticle would be a potential probe for studying carbohydrate-protein interaction in OPCs.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
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IF 7.8
Rengui Weng,Guohong Chen,Yifan Liu,Yuancai Lv,Chunxiang Lin,Xiaoxia Ye,Minghua Liu
A reductive cellulose-based aerogel (VTCA) was fabricated from cellulose by introducing valonea tannin through cross-linking reaction. VTCA owned high porosity of more than 96% with the average pore size of 30–50 µm, and it exhibited good adsorption performance for Au(III) at a wide pH values range (1−8) with the max adsorption capacity of 243.1 mg g −1 . VTCA showed good adsorption performance for Au(III) under the interference of various co-existing ions. The adsorption obeyed the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model, and temperature rise was favorable for adsorption. The adsorption-reduction mechanisms mainly involved electrostatic interaction, chelation adsorption and reduction. Au(III) could be effectively adsorbed onto the surface of VTCA by electrostatic attraction and chelation, and then reduced in situ to Au 0 by phenolic hydroxyl on tannic structure. This study provides a new adsorbent with the advantages of convenient preparation and high efficiency, and it has great application prospects in the enrichment and recovery of precious metals in waste liquid and the treatment of oxidized pollutants.
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CHEMOSPHERE
·
2021
·
IF 7.086
Yifan Liu,Zuxue Liang,Chunxiang Lin,Xiaoxia Ye,Yuancai Lv,Pingfan Xu,Minghua Liu
An amphiphilic cellulose aerogel (HCNC-TPB/TMC) was fabricated by grafting 1,3,5-Tris (4-aminophenyl)benzene (TPB) and trimesoyl chloride (TMC) onto the aldehyde nanocellulose through Schiff alkali and substitution reaction. The obtained HCNC-TPB/TMC exhibited good morphology with cellulose fiber and owned abundant hydrophilic amino and carboxyl groups and hydrophobic aromatic groups. The batch adsorption experiments demonstrated that HCNC-TPB/TMC showed excellent adsorption performance ( Q max = 526.32 mg g −1 ) for sodium diclofenac (DCF), wide pH applicability (4–10) and outstanding stability and reusability. The DCF adsorption obeyed the pseudo-second-order kinetic model and the Langmuir isotherm, and underwent a spontaneous exothermic process. The main adsorption mechanisms involved electrostatic interaction, hydrogen bonds , π-π stacking interaction and hydrophobic effect. Importantly, the introduced carboxyl aromatic groups on TMC could effectively strengthen the hydrogen bonds and the π-π stacking between HCNC-TPB/TMC and DCF.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Huan Luo,Xiaoping Bai,Huixian Liu,Xin Qiu,Jianqiu Chen,Yibing Ji
Membrane-based chiral separation has attracted widespread research attention. However, traditional chiral membranes remain an unbridgeable trade-off between permeability and selectivity. Chiral covalent organic frameworks (CCOFs) with inherently high porosity and intrinsic chirality are highly promising solutions. Herein we report novel CCOF membranes for enantioseparation of chiral drugs. A β-cyclodextrin covalent organic framework (β-CD COF) was used as the chiral selector to fabricate two types of β-CD COF membranes by physically and chemically modifying cellulose acetate substrates, including a β-CD COF mixed matrix membrane (β-CD COF MMM) and a β-CD COF thin film nanocomposite membrane (β-CD COF TFN). In particular, the β-CD COF TFN was the first reported interfacial polymerized COF membrane for enantioseparation and performed more preferentially than β-CD COF MMM. The optimal enantioselectivities of d , l -tryptophan (e.e% = 100%), ( RS )-mandelic acid (e.e% = 58.1%), d , l -phenylalanine (e.e% = 36.3%), and ( RS )-propranolol (e.e% = 18.0%) and comparable solute flux (Flux = 1.9–5.4 nmol·cm −2 ·h −1 ) were achieved using β-CD COF TFN. Benefiting from the remarkable chemical stability of β-CD COF, such membranes also had excellent thermal stability, acid resistance, and long-term storage stability. Moreover, the chiral recognition mechanism was investigated using molecular docking simulations. Fabricated membranes with high enantioseparation performance and stability provide a new perspective on establishing chiral membranes and show potential for industrial application.
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