LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
·
IF 4.952
Peng Zhang,Chang Chang,Haijie Liu,Qiaojuan Yan,Zhengqiang Jiang
Three protein-rich materials were pretreated with a self-designed alkaline electrolyzed water (AEW) pretreatment equipment to promote the release of angiotensin I-converting enzyme (ACE) inhibitory peptides by improving hydrolysis efficiency. According to degree of hydrolysis (DH) and ACE inhibitory activity, defatted walnut meal (DWM) was selected to study antihypertensive activity by hydrolysis in assistance of AEW pretreatment. It was found DWM pretreated with AEW at pH 11.5 followed by Alcalase hydrolysis exhibited the highest DH (21.96%), protein recovery rate (94.76%), and ACE inhibitory activity (IC 50 of 0.137 mg/mL), in which AEW pretreatment resulted in the transformation of α-helix and β-turn to random coil and the destruction of hydrogen bonds to expose more cleavage sites to enhance hydrolysis efficiency. Thereafter, ACE inhibitory peptides GIENYRVV (IC 50 of 0.102 mg/mL) and AGRISTVNSHTLPVL (IC 50 of 0.20 mg/mL) were identified from the hydrolysate. Overall, AEW pretreatment was an innovative strategy to promote the release of antihypertensive peptides during hydrolysis.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yiping Guo,Wei Xie,He Li,Jianping Li,Jun Hu,Honglai Liu
The adsorption desulfurization (ADS) is a promising technology for deep removing thiophene-type sulfurs, yet it remains challenges in maintaining good performance for real applications in the presence of water. Guided by theoretical calculations, we constructed hydrophobic selective channels by crosslinking porous aromatic framework (PAF) of PAF-56 on the surface of adsorbent MOF-199 with Cu nodes reduced. The optimized Cu(I)-BTC@PAF30 shows a high saturated dibenzothiophenes (DBT) adsorption capacity of 61.7 mgS g −1 from the dehydrated model oil. Attributed to the good DBT-affinity (with binding energy (BE) of −90.52 KJ mol −1 ) and water-repulsion (with BE of −14.72 KJ mol −1 ), PAF-56 coating layer significantly improves the hydrophobicity , and keeps the DBT adsorption capacity as high as 50.8 mgS g −1 in the presence of 0.5% (v/v) water, the decline of 17.6% was much smaller than the dramatical 70.9% decrease in pristine Cu(I)-BTC. More importantly, it effectively prevents Cu(I) nodes from the oxidation , and exhibits a superior stable cyclic performance with the removal efficiency above 91% after 20 cycles. Therefore, Cu(I)-BTC@PAF30 can be a good representative of this surface modification strategy to achieve promising application in industrial ADS.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
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IF 7.46
Shixuan Su,Shanshan Li,Jing Hu,Ting Yu,Lingchen Tao,Fuliang Hu,Yunlei Xianyu
Royal jelly as a functional food has great potential to promote human health. As a unique ingredient in royal jelly, 10-hydroxy-2-decenoic acid (10-HDA) is a vital criterion to evaluate the quality of royal jelly. Current approaches for 10-HDA detection mainly rely on high-performance liquid chromatographic (HPLC), but it requires large-scale equipment and skilled technicians that are costly and time-consuming. Herein, we report a colorimetric sensing strategy for 10-HDA detection based on Ag(I) and tetramethylbenzidine (TMB), a widely used chromogenic reagent. Ag(I) can oxidize TMB to generate oxidized TMB (oxTMB) showing a light-blue color. Due to the chelation with Ag (I), the introduction of 10-HDA can prevent the generation of oxTMB that results in a color fading and a decrease in absorbance. This colorimetric sensing strategy enables highly sensitive detection of 10-HDA with a linear range from 1 μM to 10 μM and a limit of detection of 0.13 μM. More importantly, this 10-HDA assay allows for a visual readout either by a smartphone or the naked eye with low cost, convenience, and rapid response that has been successfully applied for evaluating the quality of royal jelly in actual samples. The sensing strategy developed in this work provides a new colorimetric approach that holds great promise as a point-of-care platform for the food industry.
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ANALYTICA CHIMICA ACTA
·
2023
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IF 6.2
Xiaolun Peng,Rongxiang He,Junhui Xu,Chunhua Cao,Wei Wen,Xiuhua Zhang,Shengfu Wang
The sensitive and accurate detection of cardiac troponin I (cTnI) as a gold biomarker for cardiovascular diseases at an early stage is crucial but has long been a challenge. In this study, we presented such an electrochemical (EC) aptasensor by combining hybridization chain reaction (HCR)-enhanced electrochemically mediated atom transfer radical polymerization (eATRP) amplification with high-efficient separation of magnetic beads (MBs). Aptamer-modified MBs empowered effective recognition and separation of cTnI from complex samples with high specificity. The specific binding of cTnI and aptamer could release triggered DNA (T-DNA) into solution to drive an HCR process, which produced plentiful active sites for eATRP initiators labeling followed by initiating eATRP process. With the development of eATRP, a great many of electroactive polymer probes were continually in situ formed to generate amplified current output for signal enhancement. Compared to no amplification, HCR-enhanced eATRP promoted the signals by ∼10-fold, greatly improving detection sensitivity for low-abundant cTnI analysis. Integrating MBs as capture carriers with HCR-enhanced eATRP as amplification strategy, this EC aptasensor achieved a low detection limit of 10.9 fg/mL for cTnI detection. Furthermore, the reliable detectability and anti-interference were confirmed in serum samples, indicating its promising application toward early diagnosis of cardiovascular diseases.
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Environmental Technology & Innovation
·
2023
·
IF 7.1
Siqi He,Sakil Mahmud,Zhu Xiong,Yiwen Shi,Jiangyan Lu,Yuhang Cheng,Wei Zhang,Li Yu,Gaosheng Zhang
In natural freshwater and wastewater environments, thallium (Tl) is an infrequent yet exceptionally toxic heavy metal, presenting a formidable peril to human health. The arsenal of substances accessible for Tl(I) adsorption encompasses biochar, activated carbon, metal oxides, and diverse materials. The adsorption capabilities of activated carbon and biochar are limited, while metal oxide materials are expensive and challenging to regenerate. Developing cost-effective materials with high selectivity for Tl(I) removal poses an ongoing challenge in material technology. In this investigation, a novel composite denoted as PB@PDA/PEI-MF has been successfully synthesized, comprising Melamine Foam (MF) co-supported with Prussian blue nanoparticles (PB NPs) via the incorporation of polydopamine (PDA) and polyethyleneimine (PEI). The PB@PDA/PEI-MF material demonstrates remarkable efficacy in the efficient sequestration of Tl(I) across a broad pH spectrum, ranging from 6 to 10. Moreover, even in the incidence of various coexisting metal ions (e.g., Na + , K + , or Ca 2+ ), the Tl(I) removal rate by PB@PDA/PEI-MF remains consistently high, exceeding or equal to 90%. Its high selectivity, anti-ion interference ability, and ease of recycling address the most prominent shortcomings of previous materials. Leveraging these advantages, the PB@PDA/PEI-MF material demonstrates exceptional proficiency in the remediation of real-world Tl(I)-contaminated Pearl River water, aligning with the stringent industrial wastewater standards. The conclusive outcomes affirm that PB@PDA/PEI-MF presents a viable technological solution for the effective removal of Tl(I) in intricate environmental contexts.
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Laser & Photonics Reviews
·
2023
·Vol. 18
·期 1
·2300784
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IF 11
Taoze Wang,Yuzhen Wang,Weibin Chen,Zhiguo Xia
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) lighting sources are applied in non-destructive examination and illumination supplements for night monitoring. As a critical component of NIR pc-LED, NIR phosphors are required to possess a high external quantum efficiency (EQE), super thermal stability, and broadband emission to meet applications. Here, Na 2 SrGe 6 O 14 :Cr 3+ (NSGO:Cr) glass ceramics (GC) bulk via highly crystallization from glass precursor is fabricated and demonstrates an ultrabroad emission band centered at 815 nm with a full width at half-maximum (FWHM) of 214 nm and a high EQE of 49.2%. Moreover, Yb 3+ co-doping significantly enhances Cr 3+ → Yb 3+ energy transfer (ET) due to the stronger Yb 3+ : 2 F 7/2 - 2 F 5/2 absorption. Benefiting from the ET process, the Cr/Yb co-doped GC exhibits NIR-I/II emission with improved thermal stability from 30.1% to 65.0%. Furthermore, an encapsulant-free NIR GC-converted LED (GCc-LED) is prepared and exhibits 52.2 mW NIR output power with a high photoelectric conversion efficiency (PCE) of 19.4%. Under a large current of 600 mA, the NIR device exhibits a watt-level output power of 922.4 mW with a PCE of 9.1%. Compared to conventional NIR powder phosphors, NSGO:Cr/Yb GC with high performance can open up an avenue for the fabrication of high power NIR lighting sources.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Liangzhong Li,Chang Liu,Ruixue Ma,Yunjiang Yu,Zhaofeng Chang,Xiaohui Zhang,Chenyu Yang,Da Chen,Yang Yu,Wei Li,Yongdi Liu
In this study, Fe 3 O 4 @TiO 2 decorated reduced graphene oxide (RGO) nanosheets were synthesized by loading iron oxide on the surface of RGO nanosheets and subsequently coating by titanium oxide, which can be employed as the persulfate (PS) activator and high-performance adsorbent toward thallium (Tl). PS could be effectively activated by the Fe 3 O 4 @TiO 2 decorated RGO nanosheets due to the presence of RGO and Fe(II), resulting in the rapid oxidation of Tl(I) to Tl(III). The removal of Tl(I) was found to be pH-dependent, with the removal efficiency of more than 88.5% in the pH range of 8.0–12.0 at the optimal PS dosage of 10 mM and material dosage of 0.2 g/L. The surface precipitation of Tl 2 O 3 and enhanced adsorption affinity toward Tl were deduced to be main mechanisms for the extremely efficient removal of Tl(I) ions during the oxidation and adsorption hybrid process. The maximum removal capacity of the material at pH 8.0 was estimated as 673.2 mg/g based on the fitting result from the Langmuir model. Approximately 94.7% of ultimate removal capacity could be accomplished within the first 10 min at the initial Tl concentration of 8.5 mg/L. The PS catalytic oxidation coupled with the adsorption technique using the prepared Fe 3 O 4 @TiO 2 decorated RGO nanosheets were proven to be a promising approach for Tl(I) removal from water.
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REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Wenchao Zhao,Yanjun Huang,Rong Chen,Hong Peng,Yonggui Liao,Qin Wang
It is a difficult task to remove Ag(I) ions selectively from the complex wastewater containing low concentration of silver(I) ions and high concentration of interfering ions. In this work, the polyhedral oligomeric silsesquioxanes (POSS) hybrid polymer (PSDT) functionalized with thioether/hydroxyl groups was facilely synthesized by photo-initiated thiol-ene polymerization of vinylPOSS and 1, 4-dithiothreitol. The PSDT showed ultrahigh selectivity to Ag(I) ions in a wide pH range, which could completely remove trace level of Ag(I) ions (1 mg L −1 ) from the complex wastewater containing concentrated interfering ions such as Pb(II), Cu(II), Ni(II), Zn(II), Ca(II) and Fe(III) ions (each 200 mg L −1 ), nevertheless, those interfering ions were hardly adsorbed on the PSDT polymer. Moreover, the maximum adsorption capacity for Ag(I) by PSDT was 303 mg g −1 at pH 0.5, and the distribution coefficient ( K d ) for Ag(I) ions could reach 1,620,000 mL g −1 , which was significantly greater than most of the adsorbent materials reported. The high sulfur content (5.93 mmol g −1 ) of nanostructured PSDT and the formation of a stable five-membered Ag(I)-chelated ring may be the major causes for the ultrahigh selective adsorption of Ag(I) ions by PSDT.
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Separations
·
2021
·Vol. 8
·期 2
·22
·
IF 2.777
Pei Chen,Xiaoman Li,Xuemin Yan,Minglei Tian
(1) Background: ZIF-67 is one of the most intriguing metal–organic frameworks already applied in liquid adsorption. To increase its adsorption performance, dual ionic liquids were immobilized on ZIF-67 in this research; (2) Methods: The obtained sorbent was used to adsorb aristolochic acid I (AAI) in standard solutions. Then, the sorbent was applied in solid-phase extraction to remove AAI fromFibraurea Recisa Pierreextracted solution. (3) Results: By analyzing the adsorption models, the highest adsorption capacity of immobilized sorbent (50.9 mg/g) was obtained at 25 °C within 120 min. In the SPE process, 0.02 mg of AAI was removed per gram of herbal plant, the adequate recoveries were in the range of 96.2–100.0%, and RSDs were 3.5–4.0%; (4) Conclusions: The provided experimental data revealed that ZIF-67@EIM-MIM was an excellent potential sorbent to adsorb and remove AAI from herbal plant extract, and the successful separation indicated that this sorbent could be an ideal material for the pretreatment of herbal plants containing AAI.Keywords:dual ionic liquids;metal–organic framework;aristolochic acid I;Fibraurea Recisa Pierre
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Shuliang Chen,Futing Zi,Xianzhi Hu,Yunlong Chen,Peng Yang,Qiang Wang,Xuecong Qin,Huiling Cheng,Yang Liu,Yi He,Chaowu Wang,Deqiong Hu,Yingmei Liu,Yan Zhang
Silica gel (SG) was modified using 3-mercaptopropyl trimethoxysilane (MPTMS) and used as an adsorbent for the recovery of gold(I) from a thiosulfate solution, based on the hard and soft acids and bases theory. The interfacial properties of the mercaptopropyl-functionalised silica gel (MP–SG) and its performance for the adsorption of gold(I) from a thiosulfate solution were examined. An optimized modification procedure was determined to produce a MP–SG mercapto group content of 1.1 mmol·g −1 . Characterisation of the prepared samples revealed the immobilisation of the MPTMS on the SG surface through chemical adsorption, and that the modification process was accompanied by the release of methanol. The ratio of methanol to the mercapto groups was determined to be 2.06, indicating the formation of 1, 2, or 3 bonds between the SG and MPTMS. The effects of the solution pH, adsorption temperature, thiosulfate concentration and gold concentration on the adsorption of gold(I) onto MP–SG, were also evaluated. The adsorption of gold onto the MP–SG surface was determined to involve ion-interchange between the mercapto groups and Au(S 2 O 3 ) 2 3− . Numerical investigation of the gold adsorption mechanism, revealed that the charge of gold(I) decreased through charge transfer from the ligand to gold(I). The Au–MP–SG could be eluted using mixture of 1% thiourea and 2 mol·L −1 HCl. The findings of this study demonstrate the potential of SG for practical application to gold recovery from a thiosulfate solution.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 36
·36776-36785
·
IF 2.914
Ren Zhichang,Wu Wanlin,Yu Ling,Yu Yang
Thallium as a highly toxic metal element has been listed as one of priority drinking water contaminants. In this study, manganese oxide nanoparticles were synthesized through a simple hydrothermal method and applied for the removal of thallium(I). The adsorbent was composed of numerous needle-like nanorods and had an average volume diameter of 230 nm after heat-drying procedure. The crystal form of adsorbent was determined as α -MnO 2 . The adsorbent exhibited a much faster adsorption rate than most of previously reported adsorbent, achieving over 66.4% of equilibrium adsorption capacity in the first 10 min. The adsorption process was found to be highly affected by solution pH and higher than 100 mg/g of adsorption capacity could be obtained in a wide pH range of 6.0–10.0. The isotherm study indicated that the adsorption of Tl(I) on the adsorbent was favorable and governed by a chemisorption process, with the maximum adsorption capacity of 505.5 mg/g at pH 7.0. The adsorption process was confirmed to be thermodynamically spontaneous and endothermic. The presence of Na + , K + , Mg 2+ , Ca 2+ , and Cu 2+ cations had certain negative effects on the uptake of Tl(I). Based on the batch experiments and XPS analysis, the deprotonated hydroxyl groups that bonded to manganese atoms worked as the binding sites for the effective removal of Tl(I) ions and no redox reaction occurred during the adsorption process.
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OPTICAL MATERIALS
·
2019
·
IF 2.687
Jidong Deng,Jiao Xun,Rongxing He
All-inorganic cesium lead halide perovskite nanocrystals (NCs) are promising photoelectric materials for their high photoluminescence quantum yield (PLQY), narrow emission width and tunable optical band gap. Traditionally, the hot injection (HI) method has been utilized to prepare perovskite NCs. However, the HI method requires high temperature, protection under inert gas and other harsh synthetic conditions, which severely hinders large-scale production of these NCs. Herein, we directly synthesized CsPbBr 3 perovskite NCs by a modified LARP (ligand-assisted re-precipitation) approach, and then conducted a specific anion exchange reaction with inexpensive, readily available, non-toxic, and non-polluting KX (X = Cl, I) salts aqueous solution to obtain various compositions of CsPbX 3 perovskite NCs at room temperature (RT). The obtained RT-NCs have high PLQY and outstanding stability, and their photoluminescence can be precisely regulated across the whole visible region (419–670 nm). The use of inorganic salts for the ion exchange provides an efficient method for the design of various halogenated perovskite NCs and their large-scale synthesis at RT.
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