SOLAR ENERGY
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2022
·
IF 7.188
Bo Ge,Mingyang Li,Heyuan Li,Yuchao Li,Guina Ren,Wei Li
Environmental governance and clean water production are the challenges that human face. In this paper, the device composed of superhydrophobic layer, hydrophilic channel and photothermal conversion layer was fabricated. The superhydrophobic layer has a contact angle of 162°, which not only ensures the floating of the device, but also has the ability to selectively absorb non-water-soluble pollutants. In addition, the surface-loaded Bi 2 MoO 6 /Bi 2 O 3 photocatalyst can also degrade the water-soluble pollutants. After 4 cycles of photodegradation, the degradation efficiency was 92.6 %, demonstrating a stable degradation stability. The optimal content of MnO 2 (60 mg) was demonstrated by steam production rate experiments. The mechanical stability of superhydrophobic fabric, chemical stability of the MnO 2 , and photothermal stability were demonstrated. The assembled multifunctional devices can be used both for environmental treatment and for clean water production.
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ANALYTICAL BIOCHEMISTRY
·
2022
·
IF 3.191
Runxuan Zhang,Tao Liao,Xiao Wang,Hong Zhai,Di Yang,Xin Wang,Haiyan Wang,Feng Feng
Sensitive and rapid diagnostic point of care testing (POCT) system is of great significance to prevent and control human virus infection. Here reported an immunochromatographic strip technology. The second near-infrared (NIR-II) fluorescent dye encapsulated into polystyrene (PS) nanoparticles , was integrated into a lateral flow assay platform to achieve excellent detection of influenza A/B. This surface-functionalized and mono-dispersed PS nanoparticles has been conjugated with influenza nucleoprotein monoclonal antibody as targets for influenza antigen-detection. This assay achieved the detection limit of 0.015 ng/mL for influenza A nucleoprotein and 4.3*10 −5 HAU/mL (10 2.08 TCID 50 /mL) influenza A virus (influenza B: 0.037 ng/mL, 9.7*10 −7 HAU/mL (10 0.43 TCID 50 /mL)). Compared with an Au-based lateral flow test strip, the strip's sensitivity is about 16-fold higher than it. Strip detection properties remain stable for 6 months under 4 °C to 30 °C storage. The assay's intra assay variation is 5.14% and the inter assay variation is 7.74%. Other potential endogenous and exogenous interfering substances (whole blood, nasal mucin, saliva, antipyretics , antihistamines and neuraminidase inhibitors) showed negative results, which verified the excellent specificity of this method. This assay was successfully applied to the POCT quantitative detection of influenza A/B virus, the sensitivity to influenza A and B viruses was 70% and 87.5% respectively, and the specificity was 100%. Therefore, these microspheres can be used as an effective material for rapid POCT detection in clinical specimens.
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Asian Journal of Organic Chemistry
·
2022
·Vol. 11
·期 8
·e202200234
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IF 3.116
Yifei Ye,Yanglin Chen,Junzhe Huang,Jianmin Sun
Graphical A series of functionalized ionic liquids (ILs) immobilized on B-doped mesoporous SiO 2 catalysts were fabricated for effectively converting CO 2 into cyclic carbonates under metal-absent and cocatalyst-free conditions A series of functionalized ionic liquids (ILs) immobilized on B-doped mesoporous SiO 2 catalysts were fabricated for effectively converting CO 2 into cyclic carbonates under metal-absent and cocatalyst-free conditions. Functionalized imidazolium ILs were in-situ synthesized by Debus-Rdziszewski imidazole reaction. Among the prepared catalysts, 5B−SiO 2 −NH 2 −3−I catalyst owing to the synergistic effects of nucleophile, Lewis acid-base and hydroxyl hydrogen bond donors in the catalyst, presented the better catalytic activity for propylene epoxide to the product of propylene carbonate with 99% yield and selectivity at 110 °C and 2 MPa CO 2 . The catalyst also displayed moderate yield for various mono-substituent epoxides. Besides, the gradual decline in the product yield during consecutive runs could be easily refreshed by aqueous acidic solution washing.
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FUEL
·
2022
·
IF 8.035
Xin Huang,Zhongqing Yang,Jiaqi Qiu,Bo Tang,Changlei Qin,Yunfei Yan,Jingyu Ran
Ethylene is a valuable and widely used platform in industrial chemical. Herein, we report a potential route for selective and efficient ethylene production via chemical looping oxidative dehydrogenation of ethane using alkaline, rare earth and transition metals modified BaCoO 3 perovskite as the circulative redox catalyst. The catalysts were characterized by XRD, XPS, SEM, TEM, N 2 adsorption-desorption, H 2 -TPR, and O 2 -TPD analyses. Results showed that ethane conversion and ethylene selectivity were mainly regulated by lattice oxygen and Co valence of the catalysts, respectively. Doping of La to A-site of BaCoO 3 promoted ethane conversion while doping of Cu to B-site contributed to ethylene selectivity. Both ethane conversion and ethylene selectivity were enhanced by the co-doping of La and Cu to A/B-site of BaCoO 3 , obtaining the highest selectivity of 81.2% at ethane conversion of 67.6%. The ethylene yield over Ba 0.7 La 0.3 Co 0.8 Cu 0.2 O 3 was 7.9% higher than that over patent BaCoO 3 (53.7% versus 45.8%). In addition, the Ba 0.7 La 0.3 Co 0.8 Cu 0.2 O 3 catalyst also exhibited a stable catalytic performance during 12 redox recycles.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
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IF 3.428
Kanghua Li,Yang Xiao,Yuchi Zhao,Yonghui Xia,Jianhua Ding,Quanguo He,Juan Ling,Guangli Li
Rhodamine B (RhB) is a synthetic xanthine dye that is harmful to environment and human health. Therefore, the development of low cost and efficient analytical techniques for RhB monitoring is very critical for environmental protection and food safety. Herein, a novel metal-free voltammetric sensor was constructed for sensitive detection of RhB using carboxyl-functionalized carbon nanomaterials. To understand the role of carboxyl functionalization in RhB electrooxidation, the electrochemical properties and voltammetric responses of carboxyl-functionalized multi-walled carbon nanotube (f-MWCNT), carboxyl-functionalized reduced graphene oxide (f-RGO), multi-walled carbon nanotube (MWCNT) and reduced graphene oxide (RGO) were compared. Amongst, the f-MWCNT/GCE exhibited the lowest charge transferred resistance and the largest electroactive surface area. The f-MWCNT/GCE showed extraordinary electrocatalytic activity for RhB oxidation, which is primarily attributed to the unique 3D structure and the carboxyl functionalization. The anodic peak current of RhB is linearly correlated to RhB concentration from 0.05 to 100 μM with a low limit of detection (LOD, 2.6 nM). In addition, the f-MWCNT/GCE achieved the selective identification and detection of RhB in presence of common metal ions and other red dyes, and retained a robust and stable voltammetric responses for at least a week. The f-MWCNT/GCE was successfully applied to detect RhB concentration in tomato sauce samples with good recovery.
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Yingying Hu,Rentian Guan,Shuai Zhang,Xiaoyu Fan,Wenjing Liu,Keying Zhang,Xiaodong Shao,Xia Li,Qiaoli Yue
A convenient fluorescence sensor of tetracycline (TC) was constructed based on carbon dots (CDs) and polyvinyl alcohol (PVA) hydrogel film. The immobilization of CDs in PVA carrier can stabilize the fluorescence of CDs by inhibiting the fluorescence quench due to the aggregation of CDs with time. CDs were prepared by a hydrothermal method. CDs showed bright blue fluorescence with the quantum yield of 0.35. The fluorescence of CDs was quenched by TC owing to the inner filter effect. The linear range for TC detection was 0–350 µM and the limit of detection was 0.17 µM. To test conveniently, PVA film was employed to upload CDs. Therefore, a novel sensor for TC was constructed in a visual mode. By comparison with the most of previous works, the present method displayed higher sensitivity and better selectivity. The results suggest that the present sensor has potential applications in the real-time detection of TC in food analysis.
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BIOTECHNOLOGY PROGRESS
·
2021
·Vol. 38
·期 1
·e3218
·
IF 2.681
Xiao-Jian Zhang,Feng-Yu Qi,Jia-Mei Qi,Fei Yang,Jiang-Wei Shen,Xue Cai,Zhi-Qiang Liu,Yu-Guo Zheng
The Candida antarctica lipase B (CALB) was embedded in the metal-organic framework, zeolitic imidazolate framework-8 (ZIF-8), and applied in the enzymatic synthesis of L -ascorbic acid palmitate (ASP) for the first time. The obtained CALB@ZIF-8 achieved the enzyme loading of 80 mg g −1 with 11.3 U g −1 (dry weight) unit activity, 59.8% activity recovery, and 92.7% immobilization yield. Under the optimal condition, ASP was synthesized with over 75.9% conversion of L -ascorbic acid in a 10-batch reaction. Continuous synthesis of ASP was subsequently performed in a packed bed bioreactor with an outstanding average space–time yield of 58.1 g L −1 h −1 , which was higher than ever reported continuous ASP biosynthesis reactions.
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ACS Omega
·
2021
·
IF 3.512
Zhihui Qin,Weiwei Su,Ping Liu,Jinming Ma,Yaru Zhang,Tifeng Jiao
Iron ions play an important role in our lives. Excessive or lack of iron ion intake leads to many diseases. At the same time, the water environment is easily polluted by these metal ions with the acceleration of industrialization. Therefore, the detection of iron ions in the water environment and the human body is particularly important. In this paper, we prepared a RhB-EDA fluorescent probe by condensing rhodamine B (RhB) with ethylenediamine (EDA) for high recognition of Fe3+. A RhB-EDA molecule itself is colorless and has no fluorescence emission in an alcohol solution. When Fe3+ was added, the lactam ring structure of the fluorescent probe opened, and the UV and fluorescence spectra changed. At the same time, the color of the mixed solution gradually deepened toward pink. Therefore, dual spectral detection and naked-eye observation of Fe3+ were realized. In addition, with the decrease of the pH value and the prolongation of chelating time, the ultraviolet absorbance and fluorescence emission intensity were enhanced and the color of the mixed solution deepened. The RhD-EDA fluorescent probe is simple and accurate and provides good technical support for the detection of Fe3+.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xueying Cheng,Renquan Guan,Yunning Chen,Yingnan Sun,Qingkun Shang
A Z-scheme heterojunction photocatalyst (TiO 2 (B)/BiOCl 0.7 I 0.3 -P) was constructed (B: bronze phase; BiOCl 0.7 I 0.3 : a solid solution of BiOCl and BiOI in a molar ratio of 7:3; P: polyvinylpyrrolidone). The open channels parallel to the b-axis between the axial oxygen atoms in the bronze TiO 2 , the unique layered structure of BiOCl and the excellent light absorption characteristics of BiOI create excellent conditions for the absorption and utilization of light, the separation and transmission of photo-generated carriers in the photocatalytic process. TiO 2 (B)/BiOCl 0.7 I 0.3 -P can almost completely degrade and mineralize fomesafen within 20 min, and the environmental toxicity of the degradation products is significantly reduced. Combined with high-resolution mass spectrometry, the degradation pathway of fomesafen was proposed. In addition, TiO 2 (B)/BiOCl 0.7 I 0.3 -P can also quickly and effectively degrade phenol and acetaminophen, indicating that it has good universality. To eliminate the harm caused by various herbicides to the ecological environment, photocatalytic technology will play an increasingly important role.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 9
·2108830
·
IF 18.808
Hao Liu,Shuxin Wei,Huiyu Qiu,Muqing Si,Guoqing Lin,Zhenkuang Lei,Wei Lu,Lei Zhou,Tao Chen
Many living creatures have evolved to show diverse appearance color changes in response to multiple environmental stimuli for attraction, warning, or disguise in their environments. However, it is challenging to construct artificial soft polymer hydrogels with similar multi-responsive multicolor tunable behaviors, but such materials can serve as soft biomimetic skins to dramatically enhance the function of certain machines. Herein, a specially designed material structure to present an innovative class of supramolecular fluorescent polymeric hydrogels with the integrated properties of wide multi-color tunability, multi-responsiveness, self-healing, and remolding capacities is proposed. A key feature of this rational hydrogel design is that multiple fluorophores (blue (B) aggregation-induced emissive and red/green (R/G) lanthanide coordinated ones) are organized separately into different polymer chains of one single supramolecular polymer network. Consequently, the B and R/G fluorophores are engineered to be orthogonally responsive, and the fluorescence intensity of each fluorophore can be controlled independently by different external stimuli, which contribute to multi-responsive multicolor fluorescence response. Besides, the hydrogels also have satisfying self-healing and remolding capacities. All of these promising advantages together further enabled the construction of soft biomimetic color-changing skins that can help the existing robots achieve the desirable camouflaging function.
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Journal of Energetic Materials
·
2021
·
IF 2.346
Long Cheng,Hongtao Yang,Muhammad Amjad Majeed,Yifan Li,Dongming Song,Yanchun Li
Mainly the purpose of this research is to increase the oxidation efficiency of boron powder as well as to accelerate the decomposition of AP by carrying out the trials of several metals with boron-based and AP-based propellants. B/Mg, B/Al, B/Ni, B/Fe and B/Mo composites are prepared by employing ball milling method. The thermal analysis of doped boron powder with Fe and Mo shows the better activity and reaction performance. Then, the solid propellant (SP) is kneaded within proposed proportions of B/Metal composites, HTPB and AP. The B/Metal composites have improved the combustion performance of SP in air, notably in closed bomb and these had an obvious accelerating effect on the thermal decomposition of SP, especially B/Fe. The burning rates of SP/B/Fe in air and closed bomb are 60.4 and 139% faster than that of SP, respectively. Furthermore, B/Fe changed the decomposition process of AP and dropped in the peak temperature due to Fe-promoting effect. The multiple oxidation states enable Fe to be an attractive candidate as a dopant in propellants, which exhibits superior activity in the oxidation of B and decomposition of AP.
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JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
·
2021
·
IF 1.99
Baicun Li,Yinhe Sun,Jing Lu,Xin Peng
The binding of rhodamine B (RB) to human serum albumin (HSA) in the absence and presence of Cu2+ or Fe3+ under simulated physiological conditions was studied by using various biophysical methods for the first time. The results showed that the interaction between HSA and RB could spontaneously result in the formation of HSA-RB complex (namely, static quenching mechanism) through hydrophobic interactions and hydrogen bonds irrespective of the absence or presence of metal ions. The presence of metal ions led to the reduction of binding affinity of RB to HSA compared with no metal ions, which might result from the conformational change of HSA caused by the binding of metal ions. Furthermore, the analysis of UV-vis absorption, circular dichroism, synchronous fluorescence and three-dimensional fluorescence experiments demonstrated that the addition of RB induced conformational and microenvironmental changes of HSA without and with metal ions. In short, this work will be helpful to in-depth understand the transport mechanism and biological effect of RB and the effect of metal ions on the interaction of HSA-RB in vivo.
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