Nano Research
·
2023
·Vol. 16
·期 10
·12106-12115
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IF 9.9
Wang Siqi,Jin Yao,Ai Wenhui,Wang Xiufeng,Zhang Zhiqing,Zhou Ting,Zhang Guodong,Wang Fang
Unexpected benefits to the catalytic performance of materials often originate from the presence of surface defects. Here, novel D-penicillamine modified molybdenum oxide nanodots, with abundant oxygen vacancy defects, were fabrication by a mild, simple, and cost-effective method. Ultraviolet—visible (UV—Vis) absorption spectra analysis showed that the nanodots had peroxidase-like and catalase-like activities. The reactive oxygen species were probed by electronic paramagnetic resonance technique and spectroscopic methods, demonstrating that the nanodots also had oxidase-like activity. Interestingly, the peroxidase-like activity of nanodots was synergistically enhanced in the presence of ferrous ions or ferric ions. Remarkably, less than nanomolar levels of ferrous ions were required to display this phenomenon, meaning Fenton reagent acted as leverage. Based on this, a sensitive colorimetric and fluorescent dual-mode sensor for alendronate sodium was developed. The linear ranges for colorimetric and fluorescence analysis were 0.2–2.5 and 0.2–2.0 µM, with detection limits of 31.21 and 71.84 nM, correspondingly. The method has a simple large-scale material preparation process with higher sensitivity and shorter reaction time, which can inspire and enlighten the design of nanozyme sensors.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jiali Yan,Xi Wang,Jinli Zhai,Chao Gong,Wenjie Zhu,Daoli Yang,Yongming Luo,Xiaoya Gao
The recovery of anode graphite as catalysts is rarely reported in the published works. In this study, a simple method was used to recover anode graphite from spent lithium-ion battery (LIB) as catalyst to activate peroxymonosulfate (PMS) for the degradation of carbamazepine (CBZ). Graphite catalyst exhibited excellent catalytic performance with the mineralization efficiency of CBZ of 81% in the graphite/PMS system. This system was highly effective in a wide pH range of 3.0–11.0. Inorganic ions (Cl - , HCO 3 - , K + , etc) and natural organic matter (HA) exhibited some influences on the degradation of CBZ. The electron-donating groups of C O and C-OH were identified in the recovered graphite, which transferred electrons to activate PMS generating sulfate radical (SO 4 - •), hydroxyl radical (HO•), and singlet oxygen ( 1 O 2 ). Under the attack of multiple reactive species, five intermediates were detected in the degradation of CBZ and disappeared quickly after 1 min. Particularly, the graphite/PMS system was effective for CBZ degradation in real water matrix, showing a higher degradation efficiency of 93% in tap water (TW). This study provides a green and efficient approach for recovering graphite catalyst from spent LIB as PMS catalyst to degrade organic pollutants in wastewater.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Da Wen,Zhongwen You,Kaixun Tian,Zhen Wang
A treatment method for wastewater containing nickel citrate complexes was first proposed, which conformed to the strategy of “treating waste with waste”. Nickel was recovered from wastewater containing nickel citrate complexes using ferrate (VI) and the recovered product was converted to the magnetic nanocatalyst iron-nickel spinel NiFe 2 O 4 (NFO) via calcination . Subsequently, NFO was used to activate peroxymonosulfate (PMS) to degrade the nickel citrate complexes in wastewater. The morphology and crystallinity of NFO are controlled by changing the calcination temperature of the precursor, which in turn affects the catalytic properties and magnetic properties of NFO. The characterization results show that the increase of the calcination temperature can positively affect the crystallization and magnetic properties of NFO. The morphology of NFO-900 after calcination at 900 °C was octahedral nanoparticles with a maximum saturation magnetization intensity of 47.43 emu·g −1 . This implies that it can be easily magnetically recovered from the wastewater. Experiments on the degradation of nickel citrate complexes by the NFO/PMS system showed that NFO-900 had the best potential to activate PMS. Electron spin resonance and quenching experiments confirmed that the main reactive oxygen species of the system were SO 4 •- , 1 O 2 , • O 2 - , and • OH. NFO-900 also exhibited good reusability and catalytic performance after five consecutive cycles. This study provides a green and promising technology for the treatment of wastewater containing nickel citrate complexes.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2023
·
IF 6.1
Dandan Song,Xiaoyue Xu,Xingge Huang,Guoqiang Li,Yisong Zhao,Faming Gao
Transition-metal oxides (TMOs) with a hollow multishelled structure have emerged as highly potential materials for high-performance electrochemical sensing, benefiting from their superior electronic conductivity, exceptionally large specific surface area, excellent stability, and electrochemistry properties. In particular, binary TMOs are expected to outperform unitary TMOs due to the synergistic effect of the different metals. Herein, MnCo2O4.5 hollow quadruple-shelled porous micropolyhedrons (MnCo2O4.5 HoQS-MPs) were prepared and employed to construct an ultrasensitive sensing platform for a multipesticide assay. Profiting from complex hollow interior structures and abundant active sites, the MnCo2O4.5 HoQS-MPs manifest outstanding electrochemical properties as electrode materials for the pesticide assay. The MnCo2O4.5 HoQS-MP-based biosensor demonstrated remarkable performance for monocrotophos, methamidophos, and carbaryl detection, with wide linear ranges, as well as low detection limits. This work unveils a new pathway for the ultrasensitive detection of pesticides and demonstrates tremendous potential for detecting other environmentally deleterious chemicals.
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Small
·
2023
·Vol. 19
·期 16
·2206868
·
IF 13.3
Guanglei Li,Chenxin Wang,Yao Chen,Fei Liu,Haoxin Fan,Bin Yao,Jia Hao,Yiting Yu,Dan Wen
Wearable glucose sensors are of great significance and highly required in mobile health monitoring and management but suffering from limited long-term stability and wearable adaptability. Here a simultaneous component and structure engineering strategy is presented, which involves Pt with abundant Ni to achieve three-dimensional, dual-structural Pt-Ni hydrogels with interconnected networks of PtNi nanowires and Ni(OH) 2 nanosheets, showing prominent electrocatalytic activity and stability in glucose oxidation under neutral condition. Specifically, the PtNi (1:3) dual hydrogels shows 2.0 and 270.6 times’ activity in the glucose electro-oxidation as much as the pure Pt and Ni hydrogels. Thanks to the high activity, structural stability, good flexibility, and self-healing property, the PtNi (1:3) dual gel-based non-enzymatic glucose sensing chip is endowed with high performance. It features a high sensitivity, an excellent selectivity and flexibility, and particularly an outstanding long-term stability over 2 months. Together with a pH sensor and a wireless circuit, an accurate, real-time, and remote monitoring of sweat glucose is achieved. This facile design of novel dual-structural metallic hydrogels sheds light to rationally develop new functional materials for high-performance wearable biosensors.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tingyue Zhang,Liwei Guo,Ruolan Li,Jiang Shao,Lei Lu,Ping Yang,Ansha Zhao,Yanqiu Liu
Hydrogel dressings not only have basic functions such as swelling, water retention, gas permeability, and good biocompatibility but also can be endowed with advanced functions such as antibacterial, antioxidant, adhesion, hemostasis, and anti-inflammation, which make hydrogels have great application potential in clinical trauma. However, the complexity of the wound healing process makes the development of multifunctional wound dressings a great challenge. In this work, based on the thiol–ene photoclickable PEG hydrogel, the inclusion complex of the hydrophobic drug ellagic acid (EA) with mono-(6-mercapto-6-deoxy)-β-cyclodextrin (SH-β-CD) participated in the formation of a hydrogel as a crosslinker. The drug EA with antioxidant, antibacterial, and anti-inflammatory activities was introduced into the hydrogel. This strategy increases the loading capacity of the hydrogel for EA and endows the hydrogel with multifunctional properties. Then, dithiothreitol was added to adjust the mechanical stiffness of the hydrogel to meet the requirements of the wound dressing. Our results demonstrated that this wound dressing has excellent cytocompatibility, antioxidant, antibacterial, and anti-inflammatory activities. Furthermore, the results of the infected wound healing model experiment in rats confirmed that the hydrogel has the ability to rapidly shrink the wound area, prevent wound infection, and promote angiogenesis and collagen deposition. All these results suggest that this hydrogel could be a candidate for the treatment of infected wounds and shed new light on the development of multifunctional wound dressings.
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BIOMACROMOLECULES
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2023
·
IF 6.2
Lihuang Wu,Yuqi Wang,Xinyue Zhao,Hongli Mao,Zhongwei Gu
Poly(trimethylene carbonate) (PTMC), as one of the representatives of biodegradable aliphatic polycarbonates, has been found to degrade in vivo via surface erosion. This unique degradation behavior and the resulting nonacidic products make it more competitive with aliphatic polyesters (e.g., polylactide) in clinical practice. However, this surface degradation mechanism is complicated and not fully understood to date despite the findings that several reactive oxygen species and enzymes can specifically degrade PTMC in vitro. Herein, the biodegradation mechanism of PTMC was investigated by using possible degradation factors, distinct cell lines, and the inhibitors of these factors. The results demonstrate that PTMC undergoes a specific macrophage-mediated erosion. Macrophages tend to fuse into giant cells and elicit a typical inflammatory response by releasing proinflammatory cytokines. In addition, macrophages are suggested to primarily secrete enzymes (lipase specifically) to erode the PTMC bulk extracellularly as inhibiting their activity effectively prevented this eroding process. The clarification of the biodegradation mechanism in this work suggests that the degradation of PTMC highly depends on the foreign body response. Thus, it reminds the researchers to consider the effect of the microenvironment on the degradation and drug release of PTMC-based implantation devices and localized drug delivery systems.
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CHEMOSPHERE
·
2023
·
IF 8.8
Sini Lv,Fengzhen Zheng,Zeyu Wang,Luyao Dai,Huan Liu,Dzmitry Hrynshpan,Tatsiana Savitskaya,Jun Chen
The high hydrophobicity of n -hexane is the main reason why it is difficult to be removed biologically. In this study, the effects of bamboo-charcoal modified by bimetallic Fe/Pd (BBC) on n -hexane biodegradation by Pseudomonas mendocina NX-1 (PM) was investigated. The n- hexane removal efficiency was increased in the presence of BC. The highest n- hexane removal efficiency at 90.0% was achieved at 0.05 g L −1 BCE and 3 g L −1 NH 4 + under pH 7.7 and 35 °C. Additionally, protein content (45.9 μg mL −1 ) and negative cell surface zeta potential (−26.4 mV) were increased during biodegradation process, with PM-BBC being 43.1 μg mL −1 and 19.1 mV. Bacterial growth was improved and maximum cell surface hydrophobicity was obtained after 20 h, which was 59.4% higher than the control with PM-BBC (37.7%) or PM (16.1%), showing biodegradation products of 1-butanol and acetic acid. The results indicate that BBC improved n- hexane biodegradation efficiency by promoting bacterial growth, reducing cell zeta potential, exposing hydrophobic proteins, and increasing cell surface hydrophobicity of bacterial strain NX-1. This investigation suggests that BBC-enhanced biodegradation can be promising to treat n- hexane-containing gas.
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WATER RESEARCH
·
2023
·
IF 12.8
Ting Li,Jiawei Yang,Yujun Zhou,Yixin Luo,Bo Zhou,Di Fang,Jiansheng Li,Lixiang Zhou
Bioleaching facilitated by iron-oxidizing bacteria is regarded as a promising sludge dewatering method due to excellent dewaterability and low cost. However, a two-days bioleaching time for sludge conditioning decreased its daily treatment capacity. In fact, Fe 2+ easily reacts with O 2 to produce reactive oxygen species (ROS) with high oxidizing activity. Can bioleaching performed in Fe 2+ -rich system generate ROS to decompose sludge extracellular polymeric substances (EPS)? Here both contribution of ROS produced in bioleaching to improve sludge dewaterability and the increase of ROS content to shorten sludge bioleaching treatment time were investigated. The introduction of H 2 O 2 in sludge bioleaching treatment (BS+H 2 O 2 ) to increase ROS could simultaneously improve sludge dewaterability and decrease bioleaching time. Specific resistance to filtration (SRF) and capillary suction time (CST) reduction ratios (90.3% and 80.9%) in BS+H 2 O 2 process were much higher than those in other processes after only 30 min reaction. Mechanisms of improving sludge dewaterability in BS+H 2 O 2 mainly included ROS oxidation and Fe 3+ flocculation by analysis of the contribution factors. These findings not only provide an effectively method to promote sludge dewatering efficiency of bioleaching, but also give new sights into the design of cost-efficient processes for improving the sludge dewatering.
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APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Yajing Huang,Dingren Ma,Jing Cao,Zhuoyun Tang,Lingling Hu,Yexing Zhang,Huinan Zhao,Dehua Xia,Chun He,Po Keung Wong
A simple hydrothermal method was applied to synthesize a 2D/2D g-C 3 N 4 /Bi 2 WO 6 (CN/BWO) composite photocatalyst for the photocatalytic removal of gaseous methyl mercaptan (CH 3 SH). The layered structure of CN/BWO and the C-O-Bi bonds at the interlayer interface were confirmed by thorough characterization techniques. The C-O-Bi bonds were demonstrated to reduce interlayer charge transfer resistance and inhibit photogenerated electron/hole pairs recombination. Therefore, 0.1-CN/BWO exhibited the highest photocatalytic efficiency for CH 3 SH removal, which was 1.4 times higher than 0.1-CN/BWONF with nanoflower structure, and 5.1 and 1.9 times higher than that of pure g-C 3 N 4 and Bi 2 WO 6 . The photocatalytic oxidation pathway and mechanism for CH 3 SH removal were revealed based on reactive species trapping, electron spin resonance (ESR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) tests. This work provides new insights into the design of photocatalysts with high photocatalytic performance and stability for the removal of volatile organic compounds (VOCs).
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jawad Ali,Dan Li,Ajmal Shahzad,Muhammad Wajid Ullah,Jerosha Ifthikar,Muhammed Asif,Chen Yanan,Xie Lei,Zhuqi Chen,Songlin Wang
The Fe-based materials were considered very attractive for the treatment of wastewater using peroxymonosulfate (PMS) activation. However, the difficulties to restore the active Fe 2+ oxidation state restrict them to attained sustainable efficiency. In this work, a new strategy was introduced to accelerate the regeneration of Fe 2+ state through constructing an electron-rich MoS 4 2− centre in the inter-layers of FeMgAl layered double hydroxide (MoS 4 -LDH) catalyst. The dual centre MoS 4 -LDH catalyst was found more efficient as clear from the observed atrazine (ATZ) degradation rate of 0.117 min −1 , 100 times higher than the Fe 3+ /PMS or 25–50 times higher than the Fe based single centre NO 3 -LDH/PMS, CO 3 -LDH/PMS or S 2 O 4 -LDH/PMS systems, respectively. This boosted efficiency was related to the electron-rich MoS 4 2− centre which allows the constant electron transfer to reduce the electron-deficient Fe 3+ center at MoS 4 -LDH surface and thereby accelerating the Fe 2+ /Fe 3+ redox cycle during reaction. Furthermore, the MoS 4 -LDH/PMS system exhibited a broader effective pH (3.0–9.0), good stability and minimum influence of background electrolyte or organic matter. The degradation pathway of ATZ based on free radical (SO 4 – and OH), involving the redox cycles of Fe 3+ /Fe 2+ and Mo 6+ /Mo 4+ was proposed for the activation of PMS . This work highlighted the essential role of MoS 4 2− moiety, to accelerate the Fe 3+ reduction at the surface of the LDH catalyst through the continuous feeding of electrons.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shuang Liang,Guozhe Sui,Dongxuan Guo,Ze Luo,Rongping Xu,Hong Yao,Jinlong Li,Chao Wang
The development of efficient heterojunctions with enhanced photocatalytic properties is considered a promising approach for photocatalytic hydrogen production. In this study, graphitic carbon nitride (g-C 3 N 4 )-wrapped nickel-doped zinc oxide/carbon (Ni-ZnO@C/g-C 3 N 4 ) core-double shell heterojunctions with unique core-double shell structures were employed as efficient photocatalysts through an innovative approach. Ni doping can enhance the intensity and range of visible light absorption in ZnO, and the carbon core coupled with the hollow double-shell structure can accelerate the charge transfer rate and improve the photon utilization efficiency. Meanwhile, the construction of the Z-scheme heterojunction extended the electron-hole pair transport path. In addition, the Z-scheme charge-transfer mechanism of Ni-ZnO@C/g-C 3 N 4 under simulated sunlight was verified by photoluminescence (PL) and electron spin resonance (ESR) experiments. As a result, the obtained photocatalyst acquired a high hydrogen evolution rate of 336.08 μmol g −1 h −1 , which is 36.49 times higher than that of pristine ZnO. Overall, this work may provide a pathway for the construction of highly efficient photocatalysts with unique core-double shell structures.
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