SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Yaqiong Zhang,Xu Xu,Lei Zhang
Accurate on-site profiling of the pollutants is of vital significance for estimating environmental pollution . Herein, we propose a paper-based fluorescence-sensing system to precisely report the level of multiple pollutants. A high-performance fluorescence-sensor for apparatus-free and visual on-site tandem precisely reporting phosphate ions (Pi), o -phenylenediamine (OPD), and benzaldehyde (BA) levels have been fabricated successfully by introducing synthesized red emission (>600 nm) fluorescent chromophore 10-(diethylamino)-3-hydroxy-5,6-dihydrobenzo [c]xanthen-12-ium (HTD) into the environment of CoZn zeolitic imidazolate framework (CoZn ZIF) by a simple stirring method. CoZn ZIF@HTD with the bimetallic nodes not merely provided main Zn 2+ sites for specific recognition of Pi to generate an enhanced red fluorescent optical signal , Co 3+ /Co 2+ exhibited excellent peroxidase-like activity for the catalytic oxidation of OPD substrate in the presence of H 2 O 2 resulting in color changing from red to yellow. Subsequently, the obvious yellow fading of the OPDox species took place with the addition of BA. By virtue of the sensitively visual tandem detection of Pi, OPD, and BA, the sensor can be applied to real wastewater samples. Meanwhile, this fluorescent sensor was further adopted for practical application in confocal cell imaging and security inks. Overall, this work established a fluorescent sensing system with integrated multifunctional applications for environmental and biological samples, implying the great potential for simultaneous real-time cascade detection of various important pollutants with the merit of low-cost, time-saving, and easy-to-use.
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Energy Storage Materials
·
2022
·
IF 20.831
Zenghui Bi,Hua Zhang,Xue Zhao,Yuwen Wang,Fang Tan,Songqing Chen,Ligang Feng,Yingtang Zhou,Xin Ma,Zhi Su,Xinzhong Wang,Thomas Wågberg,Guangzhi Hu
Inexpensive, high-activity bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are imperative for the development of energy storage and conversion systems. A nitrogen-doped carbon material with a micro−meso−macroporous structure doped with La (LaPNC) containing La−O/N−C active sites is prepared using SiO 2 particle templating of carbon and a metal node exchange strategy. The coordination environment of La sites stabilized by two oxygen and four nitrogen atoms (LaO 2 N 4 ), is further verified by X-ray absorption spectroscopy. The ORR half-wave potential reaches 0.852 V, and the OER overpotential reaches 263 mV at 10 mA cm −2 . The Zn−air battery, with LaPNC as the air cathode, has a maximum power density of 202 mW cm −2 and achieves stable charge−discharge for at least 100 h without a significant increase or decrease in the charge or discharge voltages, respectively. Density functional theory calculations suggest that LaO 2 N 4 sites exhibit the lowest activation free energy and the most easily desorbed oxygen capacity. This study provides new insights into the design of efficient, durable bifunctional catalysts as alternatives to precious-metal-based catalysts.
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FOOD HYDROCOLLOIDS
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2022
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IF 11.504
Lijia Li,Meng Zhang,Xumei Feng,Haodong Yang,Meili Shao,Yuyang Huang,Yang Li,Fei Teng
This study aimed to examine the effects of gelation on the stability and functionality of soybean lipophilic protein (LP)-stabilized W/O/W emulsions by gelating the internal and external aqueous phases separately. Xanthan gum , gum arabic , methylcellulose, and pectin were used to gel the internal/external aqueous phase of W/O/W emulsions. The measurements of particle size, zeta potential , emulsifying properties, interfacial tension, microstructure, physicochemical stability, and digestion characteristics revealed that the internal/external aqueous-phase gelation effectively reduced the interfacial tension of emulsions, the external aqueous-phase gelation improved the interfacial protein adsorption rate of emulsion (more than 78%), and the internal aqueous-phase gelation improved the encapsulation efficiency of emulsion (more than 90%) and internal aqueous-phase retention (more than 85%). Meanwhile, both gelation treatments improved the digestion performance of emulsions, achieved the sustained release of entrapped materials, and improved their bioavailability. Briefly, the internal/external aqueous-phase gelation enhances W/O/W emulsion stability. This study enriched the means to improve the stability of W/O/W emulsions, which benefited the application and innovation of W/O/W emulsions in food processing.
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Materials Research Express
·
2022
·Vol. 9
·期 6
·065505
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IF 2.025
Qinghong You,Xiulian Yin,Jun Wang,Chunhua Dai
A recyclable heterogeneous KF/Ca-Mg-Al-O catalyst was prepared by co-precipitation and calcination processes. The characteristics of the catalyst were investigated using FTIR, XRD, TG-DTG and SEM. Response surface methodology was utilized to obtain the best most extreme biodiesel production yield. The ideal biodiesel production conditions were: the amount of catalyst was 3 wt%; the reaction temperature was 65 °C; the alcohol oil molar ratio 9.8:1, the reaction time was 3.5 h. Under these amended conditions, the average biodiesel yield was 95.19%, which is well in close concurrence with the worth anticipated by the model. The repeatability of catalysts was studied. After using the catalyst seven times, the catalytic efficiency was only reduced by 2.7%. These results indicate that the catalyst has good catalytic efficiency and is recyclable.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
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IF 8.025
Xiang Huang,Rui Tu,Hongbo Song,Kai Dong,Fang Geng,Lei Chen,Qun Huang,Yingmei Wu
Vitamin C is an essential nutritional supplement and antioxidant in food. However, the development of vitamin C in the food industry is limited due to its extremely poor chemical stability. In this study, W 1 /O/W 2 double emulsions loaded with vitamin C were prepared, and their structure, physicochemical stability, and in vitro gastrointestinal digestion were investigated. The results manifested that the encapsulation efficiency was the highest (90.23 ± 0.49 %) when the addition of vitamin C in the internal aqueous phase was 0.05 %. Storage stability revealed that no phase separation occurred and did not show stratification in the emulsion system during storage, and the physical stability was excellent. pH stability demonstrated that the W 1 /O/W 2 double emulsion loaded with vitamin C had a lower polydispersity index (PDI) value (0.19 ± 0.01) and greater absolute zeta potential value (40.37 ± 0.48) in alkaline environment (pH 8.0–12.0). The ionic stability suggested that the double emulsion was less stable in the presence of sodium ions. In vitro gastrointestinal digestion indicated that the bioavailability of vitamin C was 25 % after simulated digestion in vitro , elucidating that the W 1 /O/W 2 double emulsion loaded with vitamin C was released slowly in the small intestine and had a certain sustained-release function.
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Advanced Sustainable Systems
·
2022
·Vol. 6
·期 5
·2100436
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IF 6.737
Xiaolin Ren,Yuchen Tian,Firdoz Shaik,Jine Yang,Rong Liu,Kaiming Guo,Bin Jiang
Iron group metal phosphides (IMPs) are one of the most promising substitutes for non-noble electrocatalysts in overall water splitting. In this work, an electrocatalyst system consisting of different vertically aligned heteroatom-doped graphene arrays (X-rGO, X = N, P, B, O, S) integrated with FeCoNiP nanoparticles (FeCoNiP@X-rGO, X = N, P, B, O, S) is prepared for overall water splitting. The unique vertical structure and the synergistic effect between the P in P-rGO and the P in FeCoNiP leads to the excellent electrocatalytic performance of FeCoNiP@P-rGO by exhibiting low overpotentials (121 and 216 mV) at a current density of 10 mA cm −2 for hydrogen evolution reaction in 1 m KOH and 0.5 m H 2 SO 4 , respectively. As well as a low overpotential (354 mV) at a current density of 10 mA cm −2 for the oxygen evolution reaction in 1.0 m KOH. The FeCoNiP@P-rGO electrocatalyst exhibits an outstanding durability toward overall water splitting in alkaline electrolytes, and excellent Faraday efficiency (about 92%) as well. This work provides an insight in proper tuning and the development of appropriate substrates for IMPs and other transition metal compounds toward cost-effective and high efficiency electrocatalysts for water splitting reactions.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
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IF 7.926
Haosheng Sun,Jun Qin,Ludong Yi,Yinghao Ruan,Jun Wang,Dawei Fang
Hydrodynamic cavitation (HC) is not only a promising wastewater treatment technology but also an efficient heat generation method. In this work, the HC degradation of several organic dyes was carried out and the related heat generation was studied. The effects of geometrical parameters (orifice angles (α = 0 ° and± 45 °) and orifice numbers (n = 3–9)) and experimental parameters (2.0–4.0 bar pressures, 30–60 °C temperatures and 5.0–15 mg/L concentrations) on Auramine O degradation and heat generation in orifice plate HC system are investigated. TOC analysis is performed to determine the mineralization degree of Auramine O solution. The generated intermediates are detected by LC-MS. In addition, the produced free radicals in HC process are identified by adding some trapping agents. The results showed that the HC technology has high mineralization and strong heat generation abilities in degradation processes of organic pollutants . For 6-orifice plate, 4.0 bar pressure, 5.0 L solution volume and 10 mg/L concentration, 81.39% degradation ratio of AO was achieved at 90 min cycle moment. And that, 1082.52 kJ heat energy with 40.09% thermal efficiency was obtained during 30 min cycle time. Perhaps, this work may provide a new strategy for simultaneous large-scale organic wastewater treatment and effective heat production recycle.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2021
·
IF 5.279
Xiaoli Song,Yang Lu,Yongling Lu,Lishuang Lv
Acrolein (ACR) derives from the external environment and the endogenous metabolism of organisms. It has super-reactivity and can induce various diseases. We investigated the capacity of cyanidin-3-O-glucoside (C3G) and its degradants/metabolites to capture ACR during thermal processing or in vivo. Our results indicated that both C3G and its degradants, including phloroglucinaldehyde (PGA) and protocatechuic acid (PCA), could efficiently trap ACR to form adducts, such as C3G–ACR, C3G–2ACR, PGA–ACR, PGA–2ACR, PCA–ACR, and PCA–2ACR. Additionally, these adducts were detected in commercial canned red bayberry products. The adducts of C3G and its metabolites conjugated with ACR, such as C3G–ACR, C3G–2ACR, PGA–ACR, and 4-hydroxybenzoic-acid–ACR (4-HBA–ACR), were also detected in mice feces treated with C3G by oral gavage, where the adduct level was dose-dependent. A similar pattern was observed in tests on human consumption of red bayberry. In human urine, only PGA–2ACR and 4-HBA–ACR, were found, whereas C3G–ACR, C3G–2ACR, myricetin-3-O-rhamnoside–ACR (M3R–ACR), PGA–2ACR, 4-HBA–ACR and ferulic acid–ACR (FA–ACR) were detected in human feces following administration of red bayberry. Our results are the first demonstration that C3G and its metabolites can capture ACR in vitro and in vivo (mice and humans) and present a novel strategy, the development of C3G as a promising ACR inhibitor.
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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Yaxin Zheng,Zexiu An,Weihua Liu,Minghua Wang,Yichun Ren,Dongchen Yang,Wei Gao,Ningzhao Shang,Jinlin Zhang,Chun Wang,Shutao Gao
Nitrogen vacancy incorporation into Co 4 N-600 upshifts the D-band center and facilitates the generation of Co IV =O. • The Co 4 N-600/PMS system yields a modified kinetic rate constant of 300.6 min⁻ 1 M⁻ 1 . • Rapid degradation of different types of pollutants within Co 4 N-600/PMS system. High‑valent cobalt-oxo species (Co IV =O) have been demonstrated to exhibit efficient degradation capability toward emerging contaminants (ECs). However, the 3d 7 electronic configuration of Co(II) sites in Co‑based catalysts severely restricts their binding affinity to the terminal oxygen of peroxymonosulfate (PMS), which is unfavorable for the generation of Co IV =O. Herein, we report a nitrogen vacancy (Nv)‑rich cobalt nitride nanozyme Co 4 N-600. The introduction of Nv markedly reduces the d‑electron occupancy of Co, upshifts the d‑band center, and promotes the formation efficiency of Co IV =O. Remarkably, employing 150 mg L −1 peroxymonosulfate (PMS) as the oxidant, the Co 4 N-600 nanozyme achieves complete degradation of 10 mg L −1 imidacloprid within 10 min at an ultralow catalyst loading of 1 mg L −1 , yielding an excellent modified kinetic rate constant of 300.6 min −1 M −1 . These findings establish d -band center engineering as an effective strategy for boosting the catalytic performance of nanozymes by promoting the generation of high-valent metal-oxo (HVMO) species. Download: Download high-res image (179KB) Download: Download full-size image
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FUEL
·
2021
·
IF 6.609
Yishuang Wu,Zixiang Lin,Xun Zhu,Xun Hu,Mortaza Gholizadeh,Hongqi Sun,Yong Huang,Shu Zhang,Hong Zhang
Catalytic hydrogenolysis of lignin to phenolic monomers has received a lot of attention, but it is still a challenge because the cleavage of the strong C(sp 2 )-O/C bonds between structural units is usually under harsh conditions, resulting in the presence of the competing reaction of hydrogenation. Herein, hydrogenolysis of an herbaceous lignin into phenolic monomers was performed over Ru supported on various (non)-functionalized graphitized carbon nanotubes (CNT, CNT-OH, CNT-COOH, and CNT-NH 2 ), which were featured by different hydrogenation performances originally from the diverse metal-support interactions. Among the investigated supports, CNT-NH 2 enables the formation of the finest Ru nanoparticles with an average size of 1.86 nm, leading to the highest yield of phenolic monomers from lignin hydrogenolysis. The best hydrogenolysis performance of Ru@CNT-NH 2 was mainly from the partial hydrogenation of C(sp 2 )-O/C bonds to C(sp 3 )-O/C bonds in lignin, thus reducing their bond dissociation energy (BDE). The intimacy between hydrogenolysis and hydrogenation was further proved by depolymerization of a lignin β-O-4 model compound.
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ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Hairus Abdullah,Yu-Rou Ko,Dong-Hau Kuo,Noto Susanto Gultom
La–Sn-codoped Zn(O,S) catalysts were synthesized with different amounts (0%, 2.5%, 5%, and 10%) of Sn and a constant amount (10%) of La to improve the photocatalytic hydrogenation reaction (PHR) of azobenzene to aniline. The as-prepared catalysts were carefully characterized and tested for a hydrogenation reaction. The incorporation of Sn significantly enhanced the PHR activities since the incorporated Sn in the Zn(O,S) lattices could increase the conductivity of the catalysts to improve the charge transfer during the catalytic reaction as indicated with EIS measurement. Further measurement with a photoresponse of La–Sn-codoped Zn(O,S) catalysts also exhibited relatively higher intensities as compared to those of La-doped Zn(O,S) and Sn-doped Zn(O,S) catalysts. On the basis of the measurement results of EIS and transient photo current, the La–Sn-codoped Zn(O,S) with the best properties was further utilized for PHR to convert azobenzene to aniline. GC–MS measurement confirmed that 15 ppm azobenzene could be totally converted to aniline in only 60 min which was achieved with a catalyst that was prepared with 5%-Sn and 10%-La doping. The relatively short reaction time indicated that the as-prepared catalyst had a strong reduction capability able to cleave the strong bonding of N═N in azobenzene. The reaction kinetic of the N═N bond cleavage was elucidated based on solvation, adsorption, pinning, and photocatalytic hydrogenation processes on the catalyst surfaces.
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Foods
·
2021
·Vol. 10
·期 10
·2387
·
IF 4.35
Huan Liu,Teng Hui,Fei Fang,Qianli Ma,Shaobo Li,Dequan Zhang,Zhenyu Wang
The key aroma compounds in the pre- and postrigor roasted mutton were studied in this study. The results showed that 33 and 30 odorants were detected in the pre- and postrigor roasted mutton, respectively. Eight aroma compounds, including 3-methylbutanal, pentanal, hexanal, heptanal, octanal, nonanal, 1-octen-3-ol, and 2-pentylfuran, were confirmed as key odorants by aroma recombination and omission experiments. The aroma profiles of pre- and postrigor roasted mutton both presented great fatty, roasty, meaty, grassy, and sweet odors. Particularly, the concentrations of hexanal, heptanal, octanal, nonanal, 1-octen-3-ol, and 2-pentylfuran in postrigor roasted mutton were significantly higher (p< 0.05) than those in the prerigor roasted mutton. The postrigorback strapwas more suitable for roasting than the prerigorback strap. The pre- and postrigor roasted mutton could be obviously discriminated based on the aroma compounds by orthogonal partial least squares discrimination analysis (OPLS-DA) and principal component analysis (PCA). Hexanal and 1-octen-3-ol might potential markers for the discrimination of the pre- and postrigor roasted mutton.Keywords:roasted mutton;pre- and postrigor;key aroma compounds;marker;recombination and omission experiments
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