Materials Chemistry Frontiers
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2022
·Vol. 6
·期 21
·3205-3212
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IF 8.683
Jiangting Zhao,Zhuo Xiong,Junyi Wang,Yaqin Qiu,Yongchun Zhao,Pengfei Liu,Junying Zhang
In this study, a 1D/2D ZnO nanofiber/graphdiyne oxide heterojunction was designed for photocatalytic CO2 reduction, and the difference between graphdiyne and graphdiyne oxide was investigated as co-catalysts. The ZGDO heterostructure has strong reactant adsorption capacity due to the enlarged specific surface area and abundant hydrophilic oxygen-containing functional groups. DFT calculations, EPR, and in situ XPS further verified the S-scheme charge transfer mechanism in ZGDO. In contrast, the abilities of GD to adsorb CO2 and enhance light absorption are not as good as those of GDO, and the band structure of GD is not conducive to the formation of a favorable electric field drive at the interface with ZnO. The CO yield of ZGDO with only 3% GDO was up to 34.9 μmol h−1 g−1 in the gas–phase photocatalytic reduction of CO2, which was 4.4, 24, and 1.5 times that of ZnO, GDO, and ZnO/GD, respectively. This work opens new possibilities for the application of new non-metallic photocatalysts in the photoreduction of CO2.
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BIOMACROMOLECULES
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2022
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IF 6.978
Lu Wan,Liangliang Lu,Tangsong Zhu,Zhichang Liu,Ruichun Du,Qiong Luo,Qiang Xu,Qiuhong Zhang,Xudong Jia
As a biodegradable elastomer, poly(1,8-octanediol-co-citrate) (POC) has been widely applied in tissue engineering and implantable electronics. However, the unclear degradation mechanism has posed a great challenge for the better application and development of POC. To reveal the degradation mechanism, here, we present a systematic investigation into in vivo and in vitro degradation behaviors of POC. Initially, critical factors, including chemical structures, hydrophilic and water-absorbency characteristics, and degradation reaction of POC, are investigated. Then, various degradation-induced changes during in vitro degradation of POC-x (POC with different cross-linking densities) are monitored and discussed. The results show that (1) cross-linking densities exponentially drop with degradation time; (2) mass loss and PBS-absorption ratio grow nonlinearly; (3) the morphology on the cross-section changes from flat to rough at a microscopic level; (4) the cubic samples keep swelling until they collapse into fragments from a macro view; and (5) the mechanical properties experience a sharp drop at the beginning of degradation. Finally, the in vivo degradation behaviors of POC-x are investigated, and the results are similar to those in vitro. The comprehensive assessment suggests that the in vitro and in vivo degradation of POC occurs primarily through bulk erosion. Inflammation responses triggered by the degradation of POC-x are comparable to poly(lactic acid), or even less obvious. In addition, the mechanical evaluation of POC in the simulated application environment is first proposed and conducted in this work for a more appropriate application. The degradation mechanism of POC revealed will greatly promote the further development and application of POC-based materials in the biomedical field.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Hai Liu,Guoying Tan,Mengxuan Li,Zhuang Zhang,Marshet Getaye Sendeku,Yaping Li,Yun Kuang,Xiaoming Sun
Hydrogen evolution reaction is an important half-cell reaction in electrocatalytic water splitting process, which is an efficient way to store renewable energy into hydrogen fuel. However, grid scale water splitting always require high current densities up to amperes per square centimeter, which results change in local pH on the electrode surface, leading to instability risk of cathodic catalyst. Herein, a single atomic Ru doped WO 3 catalyst was fabricated, which exhibit excellent hydrogen evolution reaction (HER) activity with only 28.0, 17.6, and 83.0 mV in acidic, alkaline, and neutral media respectively as well as robust stability for 100 h at ampere-level current density is reported. Synchrotron radiation and density functional theory (DFT) calculations revealed that the defective oxygen and strong electron transfer from W sites to Ru not only achieved moderate H adsorption but also protected Ru sites from agglomeration, leading to superior HER activity and stability at industrial current density.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2023
·Vol. 24
·期 4
·3464
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IF 5.6
Shan-Cheng Yi,Yu-Hang Wu,Rui-Nan Yang,Dong-Zhen Li,Hazem Abdelnabby,Man-Qun Wang
Natural enemies such as parasitoids and parasites depend on sensitive olfactory to search for their specific hosts. Herbivore-induced plant volatiles (HIPVs) are vital components in providing host information for many natural enemies of herbivores. However, the olfactory-related proteins involved in the recognition of HIPVs are rarely reported. In this study, we established an exhaustive tissue and developmental expression profile of odorant-binding proteins (OBPs) fromDastarcus helophoroides, an essential natural enemy in the forestry ecosystem. Twenty DhelOBPs displayed various expression patterns in different organs and adult physiological states, suggesting a potential involvement in olfactory perception. In silico AlphaFold2-based modeling and molecular docking showed similar binding energies between six DhelOBPs (DhelOBP4, 5, 6, 14, 18, and 20) and HIPVs fromPinus massoniana. While in vitro fluorescence competitive binding assays showed only recombinant DhelOBP4, the most highly expressed in the antennae of emerging adults could bind to HIPVs with high binding affinities. RNAi-mediated behavioral assays indicated that DhelOBP4 was an essential functional protein forD. helophoroidesadults recognizing two behaviorally attractive substances:p-cymene and γ-terpinene. Further binding conformation analyses revealed that Phe 54, Val 56, and Phe 71 might be the key binding sites for DhelOBP4 interacting with HIPVs. In conclusion, our results provide an essential molecular basis for the olfactory perception ofD. helophoroidesand reliable evidence for recognizing the HIPVs of natural enemies from insect OBPs’ perspective.Keywords:herbivore-induced plant volatiles;odorant-binding proteins;Dastarcus helophoroides;binding affinities;behaviorally attractive substances
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2023
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IF 5.8
Yong-Qiang Xu,Liu-Yuan Zang,Hai-Yu Gao,Jin Peng,Dong-Yun Zheng,Chao Liu,Xiao-Jun Liu,Dong-Bing Cheng,Chun-Nan Zhu
Gd 3+ -doped quantum dots (QDs) have been widely used as small-sized bifunctional contrast agents for fluorescence/magnetic resonance (FL/MR) dual-modality imaging. However, Gd 3+ doping will always compromise the FL of host QDs. Therefore, balancing the Gd 3+ doping and the optical properties of QDs is crucial for constructing high-performance bifunctional nanoprobes . Additionally, most paramagnetic QDs are synthesized in the organic phase and need to be transferred to the aqueous phase for bioimaging. Herein, ingeniously designed shell-doped Cu-In-S/ZnS:Gd 3+ QDs have been prepared in the aqueous phase. It has been demonstrated that isolating paramagnetic Gd 3+ from fluorescent Cu-In-S core via doping Gd 3+ into ZnS shell not only avoided the decrease of FL quantum yield (QY), but also ensured the water accessibility of paramagnetic Gd 3+ ions, by which the FL QY and r 1 relaxivity of Cu-In-S/ZnS:Gd 3+ QDs achieved as much as 15.6% and 15.33 mM -1 ·s -1 , respectively. These high-performance QDs with excellent stability, low biotoxicity, and good tumor permeability were successfully applied for in vivo tumor FL/MR dual-modality imaging, and have shown significant potential in the precision detection and diagnosis of diseases.
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Environmental Science-Nano
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2022
·Vol. 10
·期 2
·567-580
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IF 9.473
Yuefei Song,Chunchun Meng,Xiaomei Chen,Yajuan Li,Saifei Ma,Lingjie Zhang,Jinran Wang,Kai Jiang
Bifunctional photocatalytic nanofiltration (PNF) membranes have gradually become one of the research hotspots in the field of micropolluted water purification. However, their usability still needs to be greatly improved. To this end, a novel surface-anchored PNF membrane was developed for synchronously degrading and separating target antibiotics in actual sewage effluent under continuous flow-through. As expected, experimental results demonstrated that the optimized PNF-2 membrane was composed of an inner dense sub-nanoporous separating layer and an outer mesoporous, thinner, and hydrophilic degrading layer. Consequently, the activated PNF-2 membrane module was capable of simultaneously removing more than 99% of trimethoprim and sulfamethoxazole, almost without sacrificing water permeability (21.1 L m−2 h−1 bar−1), indicating that the hydrophilic mesoporous degradation layer brings little additional hydraulic resistance. The removal rates of both selected antibiotics in practical water environment were slightly higher than those in the simulated water environment, mostly because of the increased steric hindrance of contaminants in the former case. Besides, after long-term operation up to 76 h, the minimum total and reversible fouling ratios (7.97% and 2.43%) together with only sporadic foulants remaining on the physically rinsed membrane surface were obtained. This is bound to greatly improve its cleaning threshold and maintain superior service performance. Moreover, the acute and chronic toxicities of its permeate were dramatically cut down to 4.14% and 1.56%, respectively. All these strongly prove that the dual functions of the PNF-2 membrane are synergetic in an uninterrupted permeating process and will boost the efficient removal of trace organic contaminants in real applications.
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IONICS
·
2022
·Vol. 29
·期 1
·419-427
·
IF 2.961
Zhao Jiang,Zhang Da,Wang Shumeng,Wang Zhitong,Xu Rongqing
Laser direct writing of polyimide (PI) film to induce porous graphene as a flexible electrode facilitates the development of efficient, low-cost, and large-scale preparation of flexible planar micro-supercapacitors (MSCs). Nevertheless, current flexible MSCs based on laser-induced graphene (LIG) face bottlenecks such as poor LIG electrode wettability, inhomogeneous doping of heterogeneous components, and limited electrochemical performance. In view of this, a simple and effective process for in situ fabrication of flexible FeO x nanoparticles embedded N-doped LIG (FeO x @NLIG) electrode is developed by laser direct writing in this study. The as-assembled in-plane FeO x @NLIG MSCs exhibit an excellent areal specific capacitance of 13.82 mF cm −2 , a remarkable energy density of 1.228 mW h cm −2 at a high power density of 0.024 mW cm −2 , good flexibility, and conspicuous cycling stability. Besides, these high-performance in-plane FeO x @NLIG MSCs as a vital micro-energy storage component can be easily miniaturized, modularized, and integrated to suit customized needs of wearable electronics due to great advantages in terms of identicality and stability of the as-fabricated FeO x @NLIG. Graphical abstract
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CNS Neuroscience & Therapeutics
·
2022
·Vol. 29
·期 1
·306-316
·
IF 7.035
Ayang Zhao,Hongjiang Jin,Guibo Fan,Yan Li,Chenglong Li,Qi Li,Xiaofei Ma,Tianyang Zhao,Siqi Sun,Shuai Liu,Yueyue Gao,Sihua Qi
Background Exposure to anesthesia leads to extensive neurodegeneration and long-term cognitive deficits in the developing brain. Caenorhabditis elegans also shows persistent behavioral changes during development after exposure to anesthetics. Clinical and rodent studies have confirmed that altered expression of the regulators of G protein signaling (RGS) in the nervous system is a factor contributing to neurodegenerative and psychological diseases. Evidence from preclinical studies has suggested that RGS controls drug-induced plasticity, including morphine tolerance and addiction. This study aimed to observe the effect of propofol exposure in the neurodevelopmental stage on learning and memory in the L4 stage and to study whether this effect is related to changes in rgs-3 expression. Methods Caenorhabditis elegans were exposed to propofol at the L1 stage, and learning and memory abilities were observed at the L4 stage. The expression of rgs-3 and the nuclear distribution of EGL-4 were determined to study the relevant mechanisms. Finally, RNA interference was performed on rgs-3 -expressing cells after propofol exposure. Then, we observed their learning and memory abilities. Results Propofol time- and dose-dependently impaired the learning capacity. Propofol induced a decline in non-associative and associative long-term memory, rgs-3 upregulation, and a failure of nuclear accumulation of EGL-4/PKG in AWC neurons. Inhibition of rgs-3 could alleviate the propofol-induced changes. Conclusion Inhibition of the expression of rgs-3 alleviated propofol-induced learning and memory deficits in Caenorhabditis elegans .
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ANALYTICA CHIMICA ACTA
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2022
·
IF 6.911
Feifeng Yang,Yue Zhu,Congyu Zhang,Ziyan Yang,Jia Yuan,Qing Zhu,Shushu Ding
As the most aggressive reactive oxygen species (ROS), hydroxyl radical (•OH) can directly modulate the biological ion channel and interfere with the progression of diseases. Inspired by biological •OH-activated ion channel, we reported a novel •OH-regulated glass nanopore functionalized with protoporphyrin Ⅸ (PP) film. This system showed outstanding •OH selective response owing to the ultra-fast reaction between •OH and thiol derivatives. In this case, the PP film is responsible for the changing not only of wettability but also of the inner surface charge. The synergetic effect of the dual transitions can regulate the ion transportation within the nanochannels and enabled tremendous enhancement of responsive efficiency. The detection limit could be achieved down to 1.58 nM. Taking advantage of the excellent analytical performance and mechanical qualities of this glass nanopore, the changes of •OH in single living cells were in situ monitored. Together, this study is beneficial for exploring the role of •OH in pathological events and shows promising potential for biomedical research.
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JOURNAL OF MEMBRANE SCIENCE
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2023
·
IF 9.5
Yaxin Wang,Can Yuan,Ke Zhou,Qilin Gu,Wenheng Jing,Zhaoxiang Zhong,Weihong Xing
Given that the membrane emulsification process involves the interaction between the membrane surfaces and two different phases (i.e., oil and water), separately manipulating the wettability of each surface would be crucial to achieve the high emulsification efficiency. Herein, the Janus silicon carbide (SiC) membranes were designed and prepared by using an emerging reactive sintering method and the subsequent chemical grafting modification on one of the hydrophilic surfaces. The surface wettability was selectively controlled by using hexadecyltrimethoxysilane (HDTMS) and 1H, 1H, 2H, 2H-perfluorooctyltrichlorosilane (FOTS) as the hydrophobic or amphiphobic modifiers, respectively. Meanwhile, the modified side of Janus SiC membranes showed super-hydrophobicity under oil. It was found that the hydrophobic surface can inhibit the spread of water on membrane surface and the oleophobic surface can reduce the pollution of the membrane, which both affected the membrane emulsification performance. The water-in-oil (W/O) emulsions with mean water droplet size of 1.26–1.57 μm can be prepared using amphiphobic-hydrophilic Janus membranes at a high emulsification flux (1910 L·m −2 ·h −1 ). Importantly, the pure water permeance only declined 15.6% of the original value after three times of membrane emulsification. Moreover, the polluted membranes can be easily and effectively regenerated by ultrasonic cleaning in ethanol with a flux recovery ratio of 95.8%. Therefore, the amphiphobic Janus SiC membranes showing improved anti-fouling ability can be effectively utilized in the emulsification of high-viscosity oil.
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WATER RESEARCH
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2022
·
IF 13.4
Yuefei Song,Yajuan Li,Xiaomei Chen,Chunchun Meng,Saifei Ma,Tiemei Li,Kai Jiang,Chun Hu
Bifunctional photocatalytic nanofiltration (PNF) membrane is increasingly concerned in practical micro-polluted water purification , but there are still several bottlenecks that inhibit its practicality. In this context, the feasibility of a novel metal-free and visible light-responsive surface-anchored PNF membrane for simultaneously removing target antibiotics in real sewage effluent in a continuous dynamic process was explored. The results showed that the optimal PNF-4 membrane was expectedly consisted of an inside tight sub-nanopore structured separation layer and an outside thinner, smoother, super hydrophilic mesoporous degradation layer, respectively. Consequently, the activated PNF-4 membrane could synergistically reduce trimethoprim and sulfamethoxazole concentrations to below two orders of magnitude, accompanying with almost constant high water permeability, suggesting that the hydrophilic modification of the mesoporous degradation layer basically offsets its inherent hydraulic resistance. Also, after repeating the fouling-physical rinsing process three times lasted for 78 h, only sporadic adherent contaminants remained onto the top surface, together with the minimal total and irreversible fouling ratios (as low as 7.2% and 1.2%, respectively), strongly demonstrated that PNF-4 membrane displayed good self-cleaning performance. Undoubtedly, this will significantly reduce its potential cleaning frequency and maintenance cost in long-term operation. Meanwhile, the acute and chronic biotoxicities of its permeate to Virbrio qinghaiensis sp. -67 were also reduced sharply to 2.22% and 0.45%, respectively. All of these evidences suggest that the dual functions of PNF-4 membrane are synergetic in an uninterrupted permeating process. It will provide useful insights for continuously enhancing the practicality and effectiveness of PNF membrane in actual micro-polluted water purification scenarios.
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CHEMOSPHERE
·
2022
·
IF 8.943
Lei Pan,Xiuping He,Junhui Chen,Jinhui Jeanne Huang,Yuning Wang,Shengkang Liang,Baodong Wang
Paralytic shellfish toxins (PSTs) producing algae are widely distributed in the global coastal aquatic environment, posing a threat to coastal ecosystem health and mariculture safety. However, the levels and potential environmental risks of PSTs frequently detected in shellfish remain largely unexplored in seawater of mariculture zones. In this study, a new method for trace detection of 13 common PSTs (<1.0 ng/L) in seawater was established based on off-line solid phase extraction (SPE) and on-line SPE-liquid chromatography-tandem mass spectrometry (on-line SPE-LC-MS/MS), and a systematic investigation of PSTs in seawater of the Laizhou Bay, a typical aquaculture bay in China, was conducted to understand their pollution status, environmental impact factors and ecological risks for the first time. Eleven PSTs were detected in the seawater of Laizhou Bay with total concentrations ranging from 0.75 to 349.47 ng/L (mean, 176.27 ng/L), which indicates the rich diversity of PSTs in the mariculture bay and demonstrates the reliability of the proposed analytical method. C1, C2, GTX2, GTX3, dc GTX2, and dc GTX3 were found to be the predominant PSTs, which refreshed the knowledge of PST contamination in the coastal aquatic environment. PST levels in seawater exhibited the highest levels in the southeastern mouth of Laizhou Bay and decreased toward the inner bay. Correlation analyses showed that climatic factors , nutrient status and hydrological conditions had significant effects on the distribution of PST in mariculture bay. Preliminary environmental risk assessments revealed that aquatic organisms throughout the waters of Laizhou Bay are at risk of chronic PST toxicity. These findings imply that the risk of PST in seawater of mariculture bay has previously been grossly underestimated, and that the coastal aquatic environment in North China and even the world may be at more serious risk of PST pollution, which should be taken seriously.
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