Journal of Environmental Chemical Engineering
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2019
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IF 0
Sefiu A. Rasaki,Tiju Thomas,Minghui Yang
Due to high surface area and large pore volume, nanostructure zinc oxides/its composites have gained a lot of research interests for heavy metal removal from water. Low stability of the ZnO at low and high pH is however a problem. In this work, ZnO@MgO, ZnO and MgO are synthesized via co-precipitation, followed by calcinations. The samples show remarkable removal of Pb(II) from water when compared to commercial samples; the best results is obtained using ZnO@MgO which exhibit adsorption capacity of 250 mg g −1 equivalent to 100% removal capacity. The optimum removal capacity is retained in a wide range of pH (i.e. pH 6–9) at temperature 30 °C. Low adsorption capacity coupled with low stability in acidic condition; a problem associated with ZnO-based adsorbents when it is being used for the removal of heavy metals from water/wastewater; often prevents this system from being practically used; is overcome here. The ZnO@MgO adsorbent shows chemical stability over wide range of pH(2–9). The adsorption is chemisorptive in nature, endothermic and evidently aided by high surface heterogeneity (△H° ˜25 kJ mol-1 and △S°˜110.6 J mol −1 K −1 ). Appreciable adsorption capacity over wide range of pH-value, high recovery and reusability results from nanosphere morphology of the composite sample; all these novel properties are attributed to the strong electronic coupling effect between MgO and ZnO. This work is expected to spur further research on ZnO-based composite materials in allied areas, including (i) mitigation of atmospheric pollution and (ii) water treatment processes.
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ANALYTICA CHIMICA ACTA
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2016
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IF 4.712
Ning Zhang,Jia Gao,Chuanhui Huang,Wei Liu,Ping Tong,Lan Zhang
In this paper, Zinc oxide (ZnO) hybridized with graphite-like C 3 N 4 (ZnO/g-C 3 N 4 ) nanoflowers based solid phase microextraction (SPME) coating was prepared on fiber using in situ hydrothermal growth method for gas chromatographic -mass spectrum (GC- MS) separation and analysis target analytes in complex matrixes for the first time. The proposed hybrid ZnO/g-C 3 N 4 fiber exhibited wide linearity for the pesticide residues in range of 0.003–5.0 ng mL −1 . The limits of detection (LOD) were 0.001–0.0025 ng mL −1 . The relative standard deviation (RSD) for three replicate extractions using one fiber was ranged from 2.3% to 7.6%. The fiber to fiber RSD was 5.3–11.3% (n = 3). This method was successfully used for simultaneous determination of nine pesticide residues in cucumber, pear, Green tea and Minjiang water with satisfactory recoveries of 79.1–103.5%. These results indicated that the ZnO/g-C 3 N 4 composite provided a promising alternative in sample pretreatment and analysis.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yan Huang,Sixian Chen,Yi Li,Qianbing Lin,Yibo Wu,Qisong Shi
Polyacrylonitrile (PAN) nanofiber-based flexible piezoelectric sensors are recognized for their applicability in wearable electronic devices, personal health monitoring, and motion detection. This research explores the impact of dual fillers, MXene and polydopamine-modified zinc oxide (PDA@ZnO), on the characteristics of PAN-based piezoelectric composite nanofiber films, including planar zigzag conformation content, dielectric, ferroelectric, piezoelectric, and mechanical properties. By integrating PDA@ZnO as a filler, PAN/MXene/PDA@ZnO-5 (PMPO) piezoelectric sensors were developed, showcasing enhanced piezoelectric sensing capabilities. These sensors achieved a sensitivity of 28.56 V/N across a broad linear range, with superior mechanical stability and durability across 3000 loading–unloading cycles, and exhibited swift response and recovery times of 49 ms and 40 ms, respectively. Furthermore, their unique fiber structure and flexibility, when interfaced with the human body, enable the detection of minute physiological movements and the conversion of varied motions into distinct voltage outputs. Thus, these sensors offer considerable promise for applications in human health monitoring and motion posture correction.
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2025
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IF 7.4
Junxiu Liu,Ruiping Wang,Dequan Liang,Shuo Zhang,Jingqi Feng,Miaojun Xu,Shuai Du,Bin Li
An urchin-like carbon and nitrogen-doped zinc oxide (U-ZnO@C-N) was prepared by calcination of zeolitic imidazolate framework-8, and it was used as synergist. Firstly, the intumescent flame retardant (IFR) containing piperazine pyrophosphate and melamine polyphosphate with a mass ratio of 2:1 was introduced into linear low density polyethylene (LLDPE). The LLDPE/IFR passed UL-94 V-0 rating during the vertical burning tests with a limiting oxygen index (LOI) of 26.0% when 25 wt% IFR was incorporated. The LLDPE composite also reached UL-94 V-0 rating when 23 wt% IFR/U-ZnO@C-N with a mass ratio of 97:3 was introduced, and its LOI value was 26.2%. It was indicated that the addition of U-ZnO@C-N enhanced the flame retardant efficiency of LLDPE. Meanwhile, the total smoke release of LLDPE/IFR/U-ZnO@C-N was reduced by 25.5% and 30.5%, respectively, compared to LLDPE/IFR and LLDPE/commercial zinc oxide (C-ZnO). It was attributed that the U-ZnO@C-N with urchin-like structure served as the skeleton and fulcrum during the formation process of char layer, which effectively improved the strength of char layer. In addition, the free electron-holes in the semiconductor U-ZnO@C-N oxidized CO to CO 2 , effectively reducing the release of toxic gas. This work provided a valuable way to prepare LLDPE composites with high flame retardancy, smoke inhibition and low toxicity, which was expected to break the limitations of LLDPE in wires and cables applications.
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高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Xue-Chun Yang,Xuan Yao,Shaqi Fu,Yuyan Cao,Tingzhan Wang,Martin Köckerling,Lingli Cheng,Zheng Jiao,Jing-Tai Zhao
Ethylene glycol (EG) is a widely used material, but its vapor is harmful to human health already in low concentrations. Thus, highly sensitive EG gas sensors are urgently needed. Herein, a series samples of ZnO and carbon dots (CDs) were synthesized at different ratios through a simple mechanical grinding method. The senor made using ZnO/CDs2 exhibits an ultra-high response (Ra/Rg) to 100 ppm EG up to 2798, 1378 and 467, and extremely low detection limit as low as 21 ppb, 13 ppb and 2 ppb, under UV light, visible light, and infrared light, respectively, as well as excellent repeatability and long-term stability. Especially, under UV light irradiation, the response of ZnO/CDs2 to 100 ppm EG is 24 times that of pure ZnO (Ra/Rg = 114.7), and more than 71 times that of 9 other gases. The outstanding gas sensing performance of ZnO/CDs2 can be attributed to the excellent light response ability of CDs at first, which greatly enriches the electron concentration in ZnO/CDs under light irradiation. Furthermore, the photo-induced electron transfer (PET) property of CDs and the p-n heterojunction formed at the interface between ZnO and CDs play a key role in rapid electron transport and transfer, avoiding a large number of electron hole recombination.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zelin Sang,Zepeng Liang,Grace Xuelian Huang,Zhenhua Chen,Xiuli Ren,Xifan Mei
Spinal cord injury (SCI) is one of the most devastating acute diseases. Zn 2+ has been verified plays a crucial role in SCI repair, however, how to continuously release zinc ions at the lesion site is still a cutting-edge challenge. Therefore, it is urgent to design a novel nanoplatform for promoting SCI repair with multifunction of controlled release of Zn 2+ and regulating ROS microenvironment of mitochondrion. Herein, we propose a protocol of preparing NIR sensitive ZnO quantum dots (QDs) decorated MXene hydrogel for SCI repair. TEM and EDS mapping showed that the ZnO QDs were uniformly distributed on the Mxene nanosheets. Catalase (CAT) analysis showed that the ZnO-Ti 3 C 2 nano enzymes could effectively scavenge ROS. Molecular biology studies showed that ZnO-Ti 3 C 2 @H repaired mitochondrial function by scavenging ROS with a clearance rate of up to 80 %. Neuronal apoptosis was subsequently reduced, and nerves and blood vessels were regenerated. NIR irradiation warmed the injury site to 42.9 °C, which enabled rapid enrichment of Zn 2+ at the lesion site. Footprinting and pathology experiments have shown that it improves functional recovery after injury and results in near-normal BMS scores. These results suggest that this multifunctional type of material incorporating NIR controlled release of Zn 2+ provides a promising strategy for promoting SCI repair.
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高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Qian Liu,Meitang Liu,Haisheng Hu,Xiaoyu Song,Lu Xiong,Xinyu Li
Lithium is a crucial strategic resource that plays a pivotal and instrumental role in facilitating the advancement of new energy technologies. The rapid growth of the renewable energy industry has resulted in a critical shortage of lithium salt supplies. The extraction of lithium from saline lake brine is characterized by its low energy consumption and cost-effectiveness, making it a prominent area of research in the field. However, the development and widespread application of lithium extraction technology under natural settings have tremendous relevance for lithium extraction in this region because of the severe natural environment and limited industrial base in the majority of saline lake areas. In this paper, zinc oxide with piezoelectric properties was prepared using hydrothermal method, and it was combined with lithium iron phosphate through sintering method to create a piezoelectric adsorbent capable of responding to mechanical energy. The adsorbent can capture wave energy in the saline lake and generate polarized electrons to accelerate theredox process, resulting in selective lithium ion adsorption. After 48 h of reaction with a 20 % zinc oxide loading and a sintering temperature of 200℃, the capacity of the piezoelectric adsorbents for lithium increased to 35.27 mg/g, as shown by experimental results. This study proposes a novel method for extracting lithium directly from saline lake brines under natural conditions, as well as a new application of piezoelectric materials.
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高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Changyuan Xu,Fengjiao Zhao,Yan Ding,Haizhen Song,Qun Wang,Hongming Yin
In this study, we propose a novel strategy to reduce Eu 2 O 3 to Eu 2+ in the 34.88P 2 O 5 -13.57B 2 O 3 -34.88ZnO-16.67KBr (PBZB) glass system by introducing (NH 4 ) 2 HPO 4 as a reducing phosphorus source. Photoluminescence (PL), photoluminescence excitation (PLE) spectral and UV–Vis absorption spectral analyses revealed that the emission peak at 325 nm excitation originates from the 4f 6 5d 1 → 4f 7 transition of Eu 2+ , confirming the reduction efficacy of (NH 4 ) 2 HPO 4 . Furthermore, incorporating 7.14 % Mn 2+ into PBZB glass and adjusting the concentration of Eu 2 O 3 demonstrated that Eu 2+ doping significantly enhances the red emission of Mn 2+ at 630 nm. Specifically, when the Eu 2 O 3 concentration is 0.12 mol%, the Mn 2+ emission intensity reaches its peak, with a 32.6 % increase in photoluminescence quantum yield (PLQY). However, further increasing the Eu 2 O 3 concentration leads to a decrease in Mn 2+ emission intensity and the appearance of Eu 3+ emission peaks, indicating a limited reduction capacity. Emission spectrum analysis showed a Eu 3+ reduction rate of 76.09 %. The effective energy transfer mechanism from Eu 2+ to Mn 2+ was verified through spectral overlap and decay curve analysis, with calculated energy transfer efficiency being similar to the PLQY increment. This study simplifies the Eu 3+ reduction process and provides a new method for optimizing Mn 2+ red emission in glass.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Constantin Muhire,Behery Realy,Xiyan Xu,Dagang Li,Niu Zhang,Dongxiang Zhang
In this work, a novel inorganic-organic Bi/La-C-oxide material for iodine vapor capture in conditions of high temperature, mostly encountered during the reprocessing of the spent nuclear fuel, was synthesized. Bi/La-C-oxide (Bi/La=1, 300 °C) was synthesized using a new approach that allowed the non-decarbonization of used fuels, which instead made a framework with the core of Bi/La oxide to form a hybrid material, which exhibited a fast iodine uptake with a capacity of 1339.64 mg·g −1 at 18 h and 1301.47 mg·g −1 after 26 h at 200 °C, respectively. Notably, Bi/La-C-oxide (Bi/La=1, 300 °C) owed the high iodine-adsorbing ability mainly from its structure made of tetragonal units of Bi 1.92 La 0.08 O 3 linked together with esters to form a polyesterified Bi/La-C-oxide framework. The thermal stability analysis of the materials before and after iodine capture showed high thermal stabilities, proving their ability to withstand real-field high-temperature conditions. ZnO was used to consolidate the iodine wastes to avoid post-sorption secondary pollution, and the iodine leaching rate was minimized to 1.143 × 10 −3 g·(m 2 ·day) −1 after 7 days of product consistency test-A.
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高影响因子
Environmental Technology & Innovation
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2025
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IF 7.1
Minghua Liu,Ran Bi,Guang Wang,Donghui Han,Zhuang Wang,Juan Wu,Ping Ding,Ye Wu,Shou Yang,Qi Yu
The widespread use of titanium dioxide (TiO 2 NPs) and zinc oxide nanoparticles (ZnONPs) in sunscreens necessitates a deeper understanding of their size-dependent aquatic toxicity and interaction mechanisms. This study systematically evaluates the individual and combined effects of TiO 2 NPs (5-10, 40, 100 nm) and ZnONPs (30, 50, 90 nm) on Chlorella vulgaris , integrating physicochemical behavior, oxidative stress responses, and interaction effects. ZnONPs exhibited 5.0–12.6 times higher toxicity than TiO 2 NPs, with EC 50 values of 55.9–77.0 mg L -1 for ZnONPs versus 385.8–704.3 mg L -1 for TiO 2 NPs. Smaller TiO 2 NPs (5–10 nm) showed greater toxicity ( EC 50 = 385.8 mg L -1 ) than larger ones (704.3 mg L -1 for 100 nm), while larger ZnONPs (90 nm) released 40% more Zn 2+ ions than smaller ones (20% for 30 nm). Joint toxicity presented was antagonistic at high concentrations but synergistic at low ( EC 5 ) and environmental levels ( p < 0.05). Small-sized mixtures (10 nm TiO 2 NPs + 30 nm ZnONPs) and large-sized mixtures (100 nm TiO 2 NPs + 90 nm ZnONPs) elevated malondialdehyde (MDA) levels by 1.8-fold compared to individual treatments. After 48 h depuration, reductions in MDA and superoxide dismutase (SOD) activities suggested cellular self-recovery, except the medium-sized mixtures remained persistent reactive oxygen species (ROS) depletion and impaired enzymatic recovery at specific concentration levels. These results provide new insights into nanoparticle toxicity mechanisms, underscoring that synergistic effects at environmentally realistic concentrations (ng L -1 to μg L -1 ) may pose unanticipated ecological risks to primary producers and disrupt aquatic food webs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Tongtong Zhu,Xu Liang,Yanrong Liang,Yusai Xu,Haitao Wang,Lingling Dong,Jiaying Zheng,Youqing Dong,Weidong Xiang,Xiaojuan Liang
The low thermal regulation and reflectivity of reflective converters limit their use in high brightness and power applications. The well-known "efficiency degradation" effect causes significant heat accumulation, leading to thermal quenching. This highlights the urgent need for the development of phosphor conversion materials with enhanced heat dissipation and reflectivity. In this study, zinc oxide (ZnO), with excellent thermal conductivity and reflectivity, was incorporated into titanium dioxide (TiO 2 ) and co-printed onto an aluminum nitride (AlN) substrate. The LuAG: Ce-PiF-TiO 2 -ZnO-AlN (LuAG: Ce PT-ZAF) reflective green converter with outstanding optothermal performance was designed. The experimental results show that the reflectivity of the doped ZnO reflective layer can reach 90.95 %, while the thermal conductivity and thermal diffusivity of LuAG: Ce PT-ZAF containing 7 % ZnO are 50.23 W·m −1 ·K −1 and 19.84 mm 2 /s, respectively. The optimized LuAG: Ce PT-ZAF glass film can withstand a maximum laser power density of up to 22.96 W/mm 2 , with a maximum luminous flux (LF max ) of 3091.40 lm and a luminous efficiency (LE max ) of 206.15 lm/W, which is 1934.40 lm and 19.21 lm/W higher than that of undoped glass films. At 498.15 K, the emission intensity of LuAG: Ce PT-ZAF reaches 91.19 %. This indicates that LuAG: Ce PT-ZAF is a promising green laser phosphor conversion material with high stability, high reflectivity, and high thermal conductivity.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Xiao-lu Fan,Jin-lan Xia,Duo-rui Zhang,Zhen-yuan Nie,Yun-peng Liu,Li-juan Zhang,Da-yi Zhang
A novel sinter method using ZnO as the activator instead of the conventional Na 2 CO 3 /CaCO 3 , (NH 4 ) 2 SO 4 , and K 2 S 2 O 7 was developed to achieve efficient sequential extraction of rare earth elements (REEs), alumina (Al), and silica (Si) from coal fly ash (CFA). Up to 93.3% Si, 87.1% REEs (70.7% Ce, 82.5% La, 83.2% Gd, 87.1% Nd, 62.3% Dy, and 81.7% Y), and 92.9% Al were extracted from CFA, respectively. Moreover, 93.1% of the ZnO activator was efficiently recycled, and the yield of red mud was only 14.9%. X-ray diffraction (XRD) and X-ray absorption near edge structure (XANES) results showed that the speciation transformation of Al/Si during CFA/ZnO roasting was as follows: mullite , quartz, amorphous Al 2 O 3 , and SiO 2 → Zn 0.75 Al 1.5 Si 1.5 O 6 , kyanite and willemite → gahnite and quartz/cristobalite solid solutions . The change in the REEs occurrence mode hinted at the migration of most REEs in aluminosilicates forms with Si during roasting, and disassociation with Si into the acid-soluble form after alkali leaching. These results indicate that the coupling of Al-Si-REE in CF was broken by this ZnO sinter method, promoting the sequential and efficient extraction of REEs, Al, and Si from CFA. This study provides a green and efficient strategy for element recovery from CFA, substantially reducing residues and favoring REEs concentration.
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高影响因子
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