CHEMOSPHERE
·
2020
·
IF 5.778
Xiangnan Zhang,Kai Yu,Hong Zhang,Yuning Liu,Jing He,Xiangyu Liu,Jie Jiang
Microplastics (MPs) pollution in the marine has become a global concern. To obtain accurate measurements of MPs in the marine sediments is important for understanding its effects and potential risks to the environment. In this study, we developed a novel method for extracting MPs from sediments by density flotation of sodium dihydrogen phosphate (NaH 2 PO 4 ) solution, which utilized the heating-assisted to increase the density of separation solution. It features high density, nontoxic, and economic, indicating its promising application in the MPs extraction. A standard procedure based on NaH 2 PO 4 for extracting MPs from sediments was established and validated by the recovery experiments of seven common plastics. Results showed NaH 2 PO 4 solution exhibited higher recovery rates than the commonly-used NaCl solution; three plastics with high density couldn’t be recovered by NaCl, while NaH 2 PO 4 was available for all the studied MPs. A large number of real beach samples was collected and validated by this method, and the abundance and characteristic of the collected MPs were further analyzed. Results exhibited the heating-assisted NaH 2 PO 4 could be a promising way for extracting MPs in environmental samples.
研究领域:
环境科学
·
海洋学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shaohui Zhang,Suying Liu,Wei Cao,Juan Luo,Yuke Gu,Xuanzhi Liu,Pengfei Tan,Ziyu Wang,Jun Pan
There are currently almost no ternary platinum-based nanosheets used for acidic oxygen reduction reactions (ORR) due to the difficulty in synthesizing ternary nanosheets with high Pt content. In this work, several ultrathin platinum-palladium-copper nanosheets (PtPdCu NSs) with a thickness of around 1.90 nm were prepared via a microwave heating-assisted method. Microwave heating allows a large number of Pt atoms to deposit into PdCu nanosheets, forming Pt-based ternary nanosheets with high Pt content. Among them, Pt 38 Pd 50 Cu 12 NSs catalyst displays the highest mass activity (MA) measured in 0.1 M HClO 4 of 0.932 A/mg Pt+Pd which is 8.6 times of that Pt/C. Besides, Pt 38 Pd 50 Cu 12 NSs catalyst also exhibits excellent stability with an extremely low MA attenuation after 80,000 cycles accelerated durability testing (ADT) tests. In the single cell tests, the Pt 38 Pd 50 Cu 12 NSs catalyst manifests higher maximum power density of 796 mW cm −2 than Pt/C of 606 mW cm −2 . Density functional theory (DFT) calculations indicate the weaker adsorption between Pt and O-species in Pt 38 Pd 50 Cu 12 NSs leads to a significant enhancement of ORR activity. This study provides a new strategy to design and prepare ultrathin Pt-based trimetallic nanosheets as efficient and durable ORR catalysts.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2018
·
IF 13.709
Yi Wu,Jing Zeng,Yinsong Si,Min Chen,Limin Wu
Transparent superamphiphobic surfaces that repel various liquids have many important applications, but there are critical challenges in their fabrication, such as expensive or complicated fabrication methods, contradictions between the rough surface for superamphiphobicity and smooth surface for transparency, large-area fabrication, etc. Herein, we report a simple and effective strategy for large-scale fabrication of robust, transparent, and superomniphobic polymer films by combined unidirectional rubbing and heating-assisted assembly technology. The obtained polymer films display two kinds of special structures of monolayer ordered re-entrant geometries with either hexagonally triangular protrusions or with hexagonally rectangular micropillars, depending upon the sphere diameters of silica templates, and demonstrate excellent repellence to water and low-surface-tension liquids, as well as high transparency.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 27
·2300364
·
IF 13.3
Qiuchun Lu,Yufei Zhang,Guanlin Yang,Meiling Xiong,Wenqiang Wu,Zhangsheng Xu,Hui Lu,Yegang Liang,Zeping He,Yang Yu,Xiaoming Mo,Xun Han,Caofeng Pan
Cesium copper halide perovskite is one of the promising materials for solar-blind light detection. However, most of the cesium copper halide perovskite-based photodetectors (PDs) are focused on ultraviolet A detection and realized on the rigid substrate in the single device configuration. Here, a flexible solar-blind PDs array (10 × 10 pixels) based on the CsCu 2 I 3 film patterns for ultraweak light sensing and light distribution imaging is reported. Large-scale CsCu 2 I 3 film arrays are synthesized with various shapes and uniform dimensions through a simple vacuum-heating-assisted solution method. Benefiting from excellent air stability and superior resistance to the photodegrading of the CsCu 2 I 3 film, the array device exhibits long-term stable photoswitching behavior for 8 h and ultralow light detection capability to resolve the light intensity of 6.1 nW cm −2 with a high responsivity of 62 A W −1 , and the array device can acquire clear images of “G”, “X”, and “U” showing the input light distribution. Moreover, the flame detection and warning system based on a curved solar-blind PDs array is demonstrated, which can be used for multi-flame monitoring and locating. These results can encourage potential applications of the CsCu 2 I 3 film-based PDs array in the field of optical communication and environment monitoring.
研究领域:
材料科学
·
光电技术
·
光子学
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）