Agronomy-Basel
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2022
·Vol. 12
·期 7
·1489
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IF 3.949
Kai Yao,Yanqing Wang,Yanyou Wu
Little is known about the competition between and niche differentiation of water and nutrients between angiosperm and gymnosperm tree species under prolonged drought stress, especially in fragile environments. We imposed 21 d drought and competition treatments onBroussonetia papyriferaandPlatycladus orientalisand measured water, N, and P contents, the isotopic composition of N and C, the activity of P assimilation enzymes, and stomatal conductance under solo planting and mixed planting to characterize resource diversity and competition in response to treatments. The N content, δ13C, δ15N, phosphomonoesterase, phosphodiesterase,gs, and foliage water content were significantly affected by the soil water content. The δ15N content in young leaves showed that N competition between these two plants could be alleviated through niche differentiation, but the changes in the PDE: PME ratio for these two plants indicated that they lost the niche differentiation of the P source under drought stress. Additionally, it was observed that foliage water content, WUE, N contents, and N and P sources were significantly affected by interspecific competition, andBroussonetia papyriferabenefited from water competition under moderate drought. Our results indicate that plants have different competition and niche differentiation modes to different nutrients under drought stress, and the effect of interspecific water competition should be seriously considered in mixed forests in semiarid areas.Keywords:angiosperm;gymnosperm;interspecific competition;water stress;stable isotopic
研究领域:
植物学
·
生态学
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DOI
高影响因子
Small Methods
·
2018
·Vol. 3
·期 4
·1800111
·
IF 0
Yuruo Qi,Junmei Zhao,Chao Yang,Huizhou Liu,Yong-Sheng Hu
Sodium vanadium fluorophosphate, Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1), is proved to be a series of very promising cathode materials for Na-ion batteries, owing to the high operating voltage and structural stability. However, the selective preparation of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with outstanding electrochemical performance still remains a big challenge. Moreover, there are lots of discrepancies concerning the Na-storage properties, including a diversity of voltage profiles and capacities reported, based on the variety of synthetic methods. Herein, a comprehensive investigation is conducted about the fabrication of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) by employing different starting materials and corresponding synthetic conditions, based on a facile low-temperature hydrothermal strategy. Results show that the pH in the reaction system may be of vital importance for the successful preparation of Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with special microarchitecture. Furthermore, it is found that NaH 2 PO 4 ·2H 2 O is the most appropriate phosphorus source, while VCl 3 , VOSO 4 · x H 2 O, and NH 4 VO 3 are the best choices of vanadium sources to prepare Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with superior Na-storage performance. This is the first time that the underlying correlations between the starting materials and the Na-storage performance, are investigated and further that guidance for the selective synthesis of phase-pure Na 3 (VO 1− x PO 4 ) 2 F 1+2 x (0 ≤ x ≤ 1) with superior performance is provided.
研究领域:
材料科学
·
电化学
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DOI
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Lei Zhao,Ge Yang,Haocheng Hu,Yuhao Sun,Zhuang Ma,Peng Peng,Eng-Poh Ng,Peng Tian,Hailing Guo,Mintova Svetlana
The nanosheet SAPO-34 zeolite crystals with a diameter of 300 nm and a thickness of 50 nm using a new phosphorus source (pyrophosphoric acid, H 4 P 2 O 7 ) were synthesized. The roles of the pyrophosphate (P 2 O 7 4− ) species in the crystallization of SAPO-34 were elucidated. The results suggested that one P atom from the P 2 O 7 4− species participated in the formation of the CHA framework structure while the other P atom served as a crystallization control agent, facilitating preferential crystal growth in [100] crystal plane. The SAPO-34 nanosheets have silica-rich shell and phosphorus-rich core leading to superior catalytic performance in methanol-to-olefin reaction (MTO). The catalytic lifetime of the SAPO-34 nanosheets was significantly improved due to the larger amount of medium-strong surface acidity and short diffusion pathway in comparison to the conventional SAPO-34 catalyst synthesized in the presence of the classical phosphorus source (H 3 PO 4 ).
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2020
·
IF 5.647
Yong Liu,Jingfu Wang,Jingan Chen,Zuxue Jin,Shiming Ding,Xiaohong Yang
The phosphate oxygen isotope (δ 18 O P ) ratio has been proven to be an effective tool to trace the sources and biogeochemical cycles of phosphorus (P) in aquatic ecosystems . However, the enrichment of phosphate (PO 4 ) and the removal of impurities are quite complex and easy to cause PO 4 loss in current δ 18 O P analytical methods. Moreover, the δ 18 O P value obtained by the commonly-used instantaneous sampling method is more of the instantaneous information of P, which is accidental or uncertain for accurate identification of the P source. In this study, a new method of in situ enrichment, elution, and purification of PO 4 (ISEEP) was developed for δ 18 O P analysis in waters. This method utilized a PO 4 binding phase (Zr-Oxide gel) to selectively in situ adsorb PO 4 in water and exhibited an adsorption capacity per unit area of up to 789.3 μg P/cm 2 . The PO 4 on the gel was eluted easily with a 1 M NaOH solution. More than 99.7% of the common anions, cations, and dissolved organic matter (DOM), as well as more than 90% of the trace elements were removed synchronously after adsorption and elution of PO 4 . The recovery rate of PO 4 in the whole procedure was as high as 92.8%. The XRD and SEM examinations showed that the ISEEP can obtain high-purity Ag 3 PO 4 solid for the δ 18 O P measurement. The reliability of the ISEEP method is confirmed by the measured δ 18 O P value and standard deviation of parallel samples from different types of natural waters obtained by both the ISEEP and the current popular McLaughlin (2004) method. It provides a good prospect of this new method for tracing the P sources and their biogeochemical cycling in aquatic ecosystems.
研究领域:
环境科学
·
生物地球化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Dai Zhengyuan,Liu Hao,Sun Xuyuan,Wang Ying,Fan Jie,Li Li,Ding Yaping
Using o-phenylenediamine as carbon source and phytic acid as phosphorus source, two P-rich carbon quantum dots RCDs and BCDs were synthesized successfully by changing the reaction temperature and time of hydrothermal method. It was found that RCDs with red emission could realize sensitive detection of 2-methylimidazole, and 2-methylimidazole had no obvious quenching effect on BCDs with blue emission, which made RCDs a sensitive, quick and selective fluorescence sensor for 2-methylimidazole detection. Under the optimal experimental conditions, the fluorescence intensity of RCDs decreased with the increasing of 2-methylimidazole concentration. The detection of 2-methylimidazole concentration by the carbon quantum dots sensor showed a good linear relationship in the range of 5 ~ 110 µM, and the low detection limit was 0.61 µM (S/N = 3). The sensor is able to detect 2-methylimidazole in lake water, enabling the application of real samples. The results show that this work provides a simple fluorescence method to detect 2-methylimidazole in water.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Haobing Zhao,Hailong Hu,Jinping Zheng,Yuan Qie,Kuibao Yu,Yangbin Zhu,Zhiqi Luo,Lihua Lin,Kaiyu Yang,Tailiang Guo,Fushan Li
With tunable emission in the full visible region, the ecofriendly InP quantum dots (QDs) show unique application prospects in light-emitting devices. At present, InP QDs suffer from wide-bandwidth emission, especially for electroluminescence (EL), which hinders their applications in high-performance display devices. Here, we report a facile one-pot synthesis of narrow-bandwidth InP/ZnSeS/ZnS QDs using a safe phosphorus source of tris(dimethylamino)phosphine, in which the ZnSeS inner-shell layer is formed via temperature-gradient solution growth from 240 to 280 °C. The synthesized green QDs have a high photoluminescence quantum yield (PLQY) of 91% and full width at half-maximum (fwhm) of 36 nm. Moreover, the resultant quantum dot light-emitting devices (QLEDs) also show a narrow fwhm of 42 nm, which is the narrowest emission of green InP QLEDs based on a safe phosphorus source reported so far. Further modulation of the electron injection into the device by inserting a thin layer of lithium fluoride results in a peak external quantum efficiency of 5.56%.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
Colloid and Interface Science Communications
·
2023
·
IF 4.5
Tongtong Li,Wan Wan,Yali Cao,Jialing Xu,Hui Chai
Electrocatalysts comprising MoO 3 coated by Co 2 P 2 O 7 nanocrystals were grown on a nickel foam (NF) substrate. The applicability of the nanocomposite material (Co 2 P 2 O 7 @MoO 3 /NF) as an electrode for the oxygen evolution reaction (OER) and overall water splitting was verified. The as-synthesized product showed the overpotentials of 227 and 377 mV to drive the OER at current densities of 50 and 100 mA cm −2 , respectively. Furthermore, the voltage of Co 2 P 2 O 7 @MoO 3 /NF as a bifunctional overall water splitting catalyst was 1.55 V at 10 mA cm −2 . Co 2 P 2 O 7 @MoO 3 /NF@NF (+)//Co 2 P 2 O 7 @MoO 3 /NF (−) can maintain >80% of its initial current density after 30 h at 15 mA cm −2 . The Co 2 P 2 O 7 @MoO 3 /NF electrode also showed a low hydrogen evolution reaction overpotential of 58.7 mV at 10 mA cm −2 . The excellent oxygen evolution and electrochemical water decomposition stability of the catalyst have broad application prospects.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Materials Today Nano
·
2024
·
IF 8.2
Qiwen Xue,Peiqing Cai,Xipeng Pu,Qi Ai,Junjie Si,Xin Yao,Gongxun Bai,Qianmin Dong,Zugang Liu
Indium phosphide quantum dots (InP QDs) have emerged as highly promising contenders for cadmium-based quantum dots , primarily due to their environmentally sustainable attributes. Early methods for synthesizing InP QDs employed tris(trimethylsilyl)phosphine and tris(dimethylamino)phosphine as phosphorus sources. However, the associated toxicity and hazards of these sources have hindered further progress. In this study, we introduce tripyrrolidine phosphine as a safe alternative phosphorus source. This source not only guarantees affordability, but also simplifies recycling and hazardous waste treatment processes. Simultaneously, precise regulation of the Zn precursor during the growth of the ZnS shell has enabled the synthesis of InP QDs of exceptional quality with a prominent emission peak at 525 nm, an impressive photoluminescence quantum yield of 76.11 %, and a narrow half-peak width of 37 nm. This achievement sets a significant precedent for the development of an environmentally friendly InP QD synthesis methodology. Furthermore, the incorporation of the QDs into white LEDs yields compelling outcomes, including color coordinates of (0.33, 0.30) and a measured correlated color temperature of 5637 K. Therefore, this study not only establishes an innovative path for InP QD production, but also drives their broader integration into the realm of white LED applications.
研究领域:
材料科学
·
光学工程
·
环境科学
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DOI
高影响因子
MICROBIAL ECOLOGY
·
2025
·Vol. 88
·期 1
·1-16
·
IF 4
Su Jinzhu,Su YuPing,weng Yuxin,Ayub Gohar,She Chenxing,Xiao Yumei
Glyphosate-based herbicides are among the most widely used agricultural chemicals globally, and their widespread application presents risks to environmental health and aquatic ecosystems. Continuous glyphosate inputs disrupt phytoplankton communities, potentially triggering harmful algal blooms. This study examines the proliferation of microalgal species exposed to low glyphosate concentrations (0.05 mg/L) and various phosphorus sources, with a particular focus on C-P and C-O-P bond phosphonates, which have been insufficiently studied in previous research. We hypothesized that cyanobacteria might exhibit a competitive growth advantage over other algal species when exposed to C-P bond glyphosate, especially under phosphorus-limited conditions. In monoculture experiments, Microcystis aeruginosa and Peridinium umbonatum var. inaequale significantly increased their biomass when cultured with C-P bond phosphonates, whereas Scenedesmus bijuga failed to thrive under similar conditions. Peridinium umbonatum var. inaequale also displayed increased soluble protein content in response to glyphosate stress, indicating an adaptive stress response. In co-culture experiments, M. aeruginosa demonstrated greater tolerance to glyphosate than P. umbonatum var . inaequale , though biomass increases were not significantly correlated with soluble protein or APA. Sediment–water interface experiments revealed that glyphosate exposure significantly promoted cyanobacterial biomass, which was approximately five times greater than that of the inorganic phosphorus group. Notably, when cyanobacterial biomass exceeded 20% of the total, Cyanophyta replaced Chlorophyta as the dominant group, suggesting a potential competitive advantage under low-dose glyphosate exposure. These findings highlight that glyphosate may promote cyanobacterial dominance by altering phytoplankton community composition, potentially contributing to the increased frequency of harmful algal blooms in nutrient-limited aquatic environments.
研究领域:
环境毒理学
·
水生生态学
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藻类学
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生态毒理学
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水污染
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微生物生态学
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生物地球化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Lei Chen,Huan Wang,Xiaohong Cao,Yue Feng,Zhibing Zhang,Youqun Wang,Yunhai Liu
A simple hydrothermal method was adopted to synthesize different inorganic-organic hybrid materials (Zr -x ), including zirconium ethylenediamine tetramethylene phosphine (Zr-EDTMP), 2-phosphobutane-1,2,4-zirconium tricarboxylate (Zr-PBTC), odium creatine phosphate zirconium phosphate (Zr-CP), and creatinol zirconium phosphate (Zr–COP). Various characterizations were utilized to explore the physical and chemical properties of materials. The applications of Zr -x in removing U(Ⅵ) were studied comprehensively. The effects of solution's pH value, contact time, initial concentration of U(Ⅵ), and temperature on adsorption were examined. Besides, the desorption, reusability, as well as adsorptive selectivity were investigated. The present study revealed that the U(Ⅵ) adsorption on Zr-EDTMP was in accordance with Sips isothermal model with the greatest adsorption capacity (317.4 mg/g) and the superior adsorptive selectivity for U(Ⅵ). Zr-EDTMP is a potentially high-efficient adsorbent for extracting U(Ⅵ) from radioactive wastewater .
研究领域:
环境科学
·
材料科学
·
核化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）