Nano Research
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2023
·
IF 9.9
Tang Jie,Sun Shengjun,He Xun,Zhang Hui,Yang Chaoxin,Zhang Min,Yue Meng,Wang Hefeng,Sun Yuntong,Luo Yonglan,Alfaifi Sulaiman,Farouk Asmaa,Hamdy Mohamed S.,Sun Xuping,Wang Huiqing,Ying Binwu
The development of highly efficient and durable oxygen evolution reaction (OER) catalysts for seawater electrolysis is of great importance for applications. Here, an amorphous FeMoO 4 nanorod array on Ni foam is reported as a highly active OER electrocatalyst in alkaline seawater, requiring only overpotentials of 303 and 332 mV to achieve 100 and 300 mA·cm −2 , respectively. Moreover, it shows strong long-term electrochemical durability for at least 50 h.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2023
·Vol. 104
·期 1
·479-487
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IF 4.1
Zhihai Liu,Ce Ma,Hongwei Gao,Xiaoli Huang,Yaru Zhang,Congmin Liu,Ranran Hou,Qidi Zhang,Qiu Li
BACKGROUND Obesity, a global chronic disease, has been recognized as a severe risk to health. In our study, a novel polysaccharide named ARS was isolated and purified from aerial part of salviae miltiorrhizae radix . Our aim is to investigate the weight-reducing effect of a polysaccharide from salviae miltiorrhizae radix on mice fed a high-fat diet. RESULTS The novel polysaccharide ARS mainly consisted of glucose and galactose with a molar ratio of 0.59:1.00. We found that treatment with ARS could inhibit weight gain of mice fed a high-fat diet via modulating the intestinal bacteria. Moreover, we surveyed its mechanism in mice, and the gut microbiota sequencing results demonstrated that ARS can reverse or resist high-fat-diet-induced significant weight gain or obesity by increasing the diversity of gut microbiota and optimizing the ratio of Firmicutes to Bacteroidetes. Phylum and species analysis of gut microbiota demonstrated that obesity caused by a high-fat diet was accompanied by significant changes in the microbial communities, but ARS could reverse the disturbance of gut microbiota induced by the high-fat diet to maintain homeostasis. CONCLUSION Overall, our findings suggested a new function of ARS in regulating gut microbiota, which provides a theoretical basis for the development of high-quality ARS functional foods and the application of dietary supplements. © 2023 Society of Chemical Industry.
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ACS Applied Polymer Materials
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2023
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IF 5
Siyuan Zhang,Jiao He,Xinjian Cheng
Amphiphilic hyperbranched polymers (AHBPs) possess important characteristics, such as high solubility, low viscosity, and multiple functional groups, making them of significant scientific interest. In this work, a chain transfer agent (CTA) with a styrene unit was synthesized at first. Subsequently, the CTA was polymerized with a coumarin derivative containing a −C=C bond through reversible addition-fragmentation chain transfer-self-condensing vinyl polymerization (RAFT-SCVP) to obtain the hyperbranched polymer HP-1. Finally, using HP-1 as a macromolecular CTA, amphiphilic hyperbranched fluorescent probes AHP-2 and AHP-3 were synthesized via RAFT polymerization of hydrophilic monomers poly[oligo(ethylene glycol) methacrylate] (PEGMA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA). The as-prepared AHP-2 and AHP-3 were characterized and confirmed. These macromolecular fluorescent probes enable highly sensitive and specific recognition of 4-nitrophenol (4-NP) with detection limit as 0.59 μM. A unique fluorescence quenching effect, termed “enriching inner filter effect (IFE)”, was revealed through the study of the recognition mechanism of the probes for 4-NP in hyperbranched polymers. This effect has the potential to expand the preparation methods of both fluorescent probes and functional hyperbranched polymers. This work investigates the synthesis methodology of amphiphilic hyperbranched polymers and the performance of fluorescent probes, providing a valuable approach for the development of highly sensitive polymer fluorescent probes in the future.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Qiao Li,Guanyong Wu,Xinze Wu,Huaixia Chen,Xueping Dang,Xiaolan Liu
An acidity-sensitive poly(N-isopropylacrylamide-methyl acrylic acid-co-divinyl- benzene) monolith was prepared in situ in a pipette tip for solid phase extraction of phenol, m-cresol, o-nitrophenol, 2,4-dichlorophenol and p- tert -butylphenol. The monolith was characterized by FT-IR, BET (surface area = 266.56 m 2 /g) and thermogravimetric analysis (thermally stable up to 350 °C). The introduction of methyl acrylic acid enhanced the stability in the strong alkaline condition. The adsorption experiments and density function theory calculations indicated NIPAM was the main adsorption sites and the adsorption mechanism of phenol on the monolith was hydrophobic interaction, H-bond interaction, C − H···π interaction of isopropyl group of NIPAM with the phenyl group of phenols. Based on these features and under the optimal extraction conditions, a pipette tip solid phase extraction coupled to high-performance liquid chromatography with ultraviolet detection method was developed for the determination of 5 phenols in the diffusion of polycarbonate cups. Due to the usage of 0.1 M NaOH as the eluent, the method presented selectivity for phenols based on the acidity-sensitive of the monolith. Wide linear range (0.6–200 µg/L), low detection limits (0.2–0.3 µg/L), good reproducibility (%RSD less than 9.8%) and satisfactory recoveries (86.3–114.1%) were obtained. The proposed method was suitable for quantitative analysis of phenollic in water samples.
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ENVIRONMENTAL RESEARCH
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2023
·
IF 8.3
Zhizhuo Chai,Jingquan Wang,Yixue Dai,Erdeng Du,Hongguang Guo
Methylisothiazolinone (MIT) is widely used in daily chemicals, fungicides , and other fields and its toxicity has posed a threat to water system and human health. In this study, ultraviolet (UV)/trichloroisocyanuric acid (TCCA), which belongs to advanced oxidation processes (AOP), was adopted to degrade MIT. Total chlorine attenuation detection proved that TCCA has medium UV absorption and a strong quantum yield (0.49 mol E −1 ). At a pH of 7.0, 93.5% of MIT had been decontaminated after 60 min in UV/TCCA system (k obs = 4.4 × 10 −2 min −1 , R 2 = 0.978), which was much higher than that in the UV alone system and TCCA alone system, at 65% (1.7 × 10 −2 min −1 , R 2 = 0.995) and 10% (1.8 × 10 −3 s −1 , R 2 = 0.915), respectively. This system also behaved well in degrading other five kinds of contaminants. Tert-butanol (TBA) and carbonate (CO 3 2− ) were separately used in quenching experiments, and the degradation efficiency of MIT decreased by 39.5% and 46.5% respectively, which confirmed that HO• and reactive chlorine species (RCS) were dominant oxidants in UV/TCCA system. With TCCA dosage increasing in a relatively low concentration range (0.02–0.2 mM) and pH decreasing, the effectiveness of this AOP system would be strengthened. The influences of coexisting substances (Cl − , SO 4 2− , CO 3 2− , NO 2 − and NO 3 − ) were explored. MIT degradation pathways were proposed and sulfur atom oxidation and carboxylation were considered as the dominant removal mechanisms of MIT. Frontier orbital theory and Fukui indexes of MIT were employed to further explore the degradation mechanism.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Jia Zhao,Heng Zhang,Yang Shi,Mengfan Luo,Hongyu Zhou,Zhenjun Xie,Ye Du,Peng Zhou,Chuanshu He,Gang Yao,Bo Lai
Ferrate (Fe(VI)) has aroused great research interest in recent years due to its environmental benignancy and lower potential in disinfection by-product generation. However, the inevitable self-decomposition and lower reactivity under alkaline conditions severely restrict the utilization and decontamination efficiency of Fe(VI). Here, we discovered that Ru(III), a representative transition metal, could effectively activate Fe(VI) to degrade organic micropollutants, and its performance on Fe(VI) activation exceeded that of previously reported metal activators. The high-valent metal species (i.e., Fe(IV)/Fe(V) and high-valent Ru species) made a major contribution to SMX removal by Fe(VI)−Ru(III). Density functional theory calculations indicated the function of Ru(III) as a two-electron reductant, leading to the production of Ru(V) and Fe(IV) as the predominant active species. The characterization analyses proved that Ru species was deposited on ferric (hydr)oxides as Ru(III), indicating the possibility of Ru(III) as an electron shuttle with the rapid valence circulation between Ru(V) and Ru(III). This study not only develops an efficient way to activate Fe(VI) but also offers a thorough understanding of Fe(VI) activation induced by transition metals.
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Fuming Miao,Shuai Zhang,Xueliang Sun,Yamin Li,Ruize Shang,Wenli Wu,Weizhou Jiao,Youzhi Liu
In this study, Mn-CoO X / γ -Al 2 O 3 (MCA) was prepared by impregnation for catalytic ozonation of phenol in a rotating packed bed (RPB), and the effects of high gravity factor ( β ), liquid flow rate ( Q L ), initial solution pH and gaseous ozone concentration ( C O 3 ) on the mineralization of phenol were explored. The results show that the degradation rate of phenol ( η phenol ) reaches 100% at 9 min and the mineralization rate ( η TOC ) reaches 95.01% at 45 min under conditions of β = 104, C O 3 = 80 mg L -1 , Q L = 80 L/h, and pH = 6. Compared with the bubbling reactor (BR)/MCA/O 3 and O 3 /RPB systems, the η TOC of the MCA/O 3 /RPB system is increased by 25.81% and 40.85%, respectively. The electron paramagnetic resonance (EPR) results reveal that hydroxyl radical (·OH) plays a critical role in the degradation of phenol by MCA catalyzed ozonation. The quenching experiment using tertiary butyl alcohol (TBA) as a scavenger of ·OH reveals that the ratio of direct and indirect degradation of phenol is 16:9. The intermediates generated during the degradation of phenol were detected by gas chromatography-mass spectrometry (GC–MS), and possible degradation pathways were proposed. In conclusion, MCA-catalyzed ozonation and RPB have a synergistic effect on ·OH initiation and improve the degradation and mineralization of phenol. This study provides a new perspective for the degradation of phenol.
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MOLECULES
·
2023
·Vol. 28
·期 13
·4918
·
IF 4.6
Kaixuan Yang,Naimeng Chen,Xiaomiao Guo,Ruoqi Zhang,Xiaoyu Sheng,Hui Ge,Zhiguo Zhu,Hengquan Yang,Hongying Lü
The search for non-noble metal catalysts for chemical transformations is of paramount importance. In this study, an efficient non-noble metal catalyst for hydrogenation, hexagonal close-packed cobalt (HCP-Co), was synthesized through a simple one-step reduction of β-Co(OH)2nanosheets via a temperature-induced phase transition. The obtained HCP-Co exhibited several-times-higher catalytic efficiency than its face-centered cubic cobalt (FCC-Co) counterpart in the hydrogenation of the C=C/C=O group, especially for the 5-hydroxymethylfurfural (HMF) hydrogenation (8.5-fold enhancement). Density functional theory calculations demonstrated that HMF molecules were adsorbed more firmly on the (112_0) facet of HCP-Co than that on the (111) facet of FCC-Co, favoring the activation of the C=O group in the HMF molecule. The stronger adsorption on the (112_0) facet of HCP-Co also led to lower activation energy than that on the (111) facet of FCC-Co, thereby resulting in high activity and selectivity. Moreover, HCP-Co exhibited outstanding catalytic stability during the hydrogenation of HMF. These results highlight the possibility of fabricating hydrogenation catalysts with satisfactory catalytic properties by precisely tuning their active crystal phase.Keywords:phase-controlled;temperature-induced phase transition;HCP-Co;FCC-Co;hydrogenation
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
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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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-16
·
IF 2.9
Zhang Ruoyao,Wang Hao,Liu Yize,Zhao Tengda,Zheng Yi,Gong Ruiquan,Chen Chunmao,Zhang Juan,Ren Hongwei
Phenolic wastewater, a type of organic refractory wastewater containing chemical poisons such as phenol, have made a great contribution to human health and the social environment. Therefore, it urgently desires to develop efficient treatment approach for phenolic wastewater. The deep eutectic solvents (DES) provide an attractive option for extracting phenolic compounds. In this work, a series of ammonium-based DES were synthesized and were characterized by in situ IR, FT-IR, and TG-DTG. The extraction conditions of phenolic wastewater were optimized including the kind of DES, temperature, and wastewater concentration. The ability to extract phenolic compounds (phenol and p -chlorophenol) from wastewater by using DES was evaluated. The best experimental conditions for TBAC/Gly DES are temperature of 30 °C, stirring time of 30 min, concentration of 350 mg·L −1 , pH between 2 and 6, and volume ratio V W : V DESs of 2. The mechanism of extract phenolic compounds using TBAC/Gly DES was investigated.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jialu Pan,Lin Che,Tong Wei,Yanqing Cong,Shi-Wen Lv
It is of great significance to rationally regulate the activation mechanism of peroxymonosulfate for wastewater treatment. Herein, for the first time, a newly-constructed NiCo 2 O 4 @ZIF-67 core–shell nanocage was employed as a mediator for effective removal of tetracycline (TC). As-prepared NiCo 2 O 4 @ZIF-67 displayed reduced charge transfer resistance and enhanced electron transfer rate. Importantly, more than 99.58% of TC can be degraded within 30 min by developed NiCo 2 O 4 @ZIF-67/PMS system, and the removal efficiency of TOC was as high as 72.81%. Moreover, antimicrobial tests revealed the low toxicity or non-toxic of degradation products. More interestingly, after coating ZIF-67 film on the surface of NiCo 2 O 4 , the electron transfer process among PMS, contaminant and catalyst was enhanced. The radical and nonradical pathways worked in coordination each other and achieved the rapid removal of various organic pollutants. The ZIF-67-derived NiCo 2 O 4 core dominated the generation of reactive oxygen species, while the coated ZIF-67 shell induced the electron transfer from TC to PMS. Besides, the introduction of ZIF-67 not only improved the anti-interference for inorganic anions, but also boosted the water stability, thereby resulting in that NiCo 2 O 4 @ZIF-67 still remained great catalytic performance after repeated use for several times. In short, current work shared a promising approach for wastewater treatment.
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BIOSENSORS & BIOELECTRONICS
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2023
·
IF 12.6
Yu-Huan Liu,Chang Liu,Xin-Hui Wang,Tong Li,Xing Zhang
Bisphenol A (BPA) is an endocrine disrupting chemical and broadly used in plastics. The leakage of BPA in food and water cycles poses a significant risk to the environment and human health. Thus, monitoring the concentration of BPA to avoid its potential risk is highly important. In this work, a simple and efficient oxygen deficient molecularly imprinted TiO 2 electrochemical sensor was proposed for the detection of BPA. The introduction both oxygen vacancies and molecular imprinting evidently enhanced the electrochemical oxidation signal of BPA. The sensor had a good linear response ranging from 0.01 μM to 20 μM with a limit of detection of 3.6 nM. Additionally, the sensor showed remarkable stability, reproducibility and interference resistant ability. It also exhibits excellent recovery during the detection of real water. These findings suggested that the sensor has the potential to be developed as a simple, efficient and low-cost monitoring system for the monitoring of BPA in water.
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