Mesotubular‐Structured Hybrid Membrane Nanocontainer for Periodical Monitoring, Separation, and Recovery of Cobalt Ions from Water

ACS Sustainable Chem. Eng.

et al. 2018

Controlled design of low-cost, ecofriendly, and efficient metal recycling process of waste printed circuit boards (PCBs) is essential for sustainable industries. In this study, a metal extractor (ME) design was fabricated by anchoring organic chromophore chelate [(E)-4-((3-amino-4-hydroxyphenyl)diazenyl)naphthalen-1-ol (AHPDN)] into three-dimensional (3D) and vertical platelets of ZnO platforms to continuously extract and sensitively and selectively detect ultratrace Co2+ concentration (∼95.7%) in real e-waste leach liquor. Results reveal that the microscopic ZnO platelet hierarchy is successfully fabricated with nonstacked 3D platelet morphology through hydrothermal-assisted methodology. The 3D nonstacked ZnO platelets are oriented in horizontal and vertical domains, thereby enabling fabrication of potential ME for multidirectional diffusion and efficient adsorptivity of Co2+ ions. Multidiffusible, intermingled platelets and numerous active sites that decorated the ME hierarchy promote the ultratrace separation and recovery of Co2+ ions from PCBs. This scalable immobilization and accommodation of AHPDN along ZnO platelet surfaces effectively controls the Co2+ ion-recovery/extraction process. The selective adsorption of Co2+ ions in the presence of other competitive ions strongly depends on pH control assay. The consumed MEs can be repeatedly recycled, their platelet hierarchy and surface features are retained, and their selective adsorption functionalities are negligibly altered. Hierarchical MEs are suitable for the extraction of Co2+ from the waste PCBs.

Section: Resultssupporting

confidence: 76%

Three-Dimensional, Vertical Platelets of ZnO Carriers for Selective Extraction of Cobalt Ions from Waste Printed Circuit Boards

Gomaa

ACS Sustainable Chem. Eng.

et al. 2018

Advanced Nanoscale Build‐Up Sensors for Daily Life Monitoring of Diabetics

2020

Adv Materials Inter

High‐throughput screening, early diagnosis, prognosis, daily routine, and real‐time monitoring are the main factors in diabetes management. Novel nanodynamic sensory designs can support these processes by offering i) a great diversity of periodic glucose sensing assays, ii) multiple and large‐scale autosampling assessments of glucose levels, and iii) possible glucose analysis by using a small sample size. This work highlights the nano, biosensor design engineering rationales used to explore a wide range of glucose levels and transduce them into readable output signals for dead‐end and fast‐response analyses. Powerful nanoscale chemical sensor designs can be used as alternatives to traditional assessment and analytical methods in the laboratory and integrated into robotics, smartphones, or wearable devices. These innovations would offer the future steady progress required for biotechnological, analytical, and sensing applications with less time consumption and simple operation. A new generation of nano, bioglucose sensor designs featuring platforms with nanometric dimensions, geometries, surface functionality, and physical/chemical properties is also attractive as a candidate for developing diabetic sensing devices. Indeed, the developed fabrication of diabetic nanosensor devices with compact size miniaturization, autosampling analysis and collection, in situ controlling assays, and defined signaling read‐out detection is urgently needed to avoid a risk associated with diabetes.

Nanomembrane Canister Architectures for the Visualization and Filtration of Oxyanion Toxins with One‐Step Processing

Aboelmagd

Chemistry An Asian Journal

et al. 2015

Self Cite

Nanomembrane canister-like architectures were fabricated by using hexagonal mesocylinder-shaped aluminosilica nanotubes (MNTs)-porous anodic alumina (PAA) hybrid nanochannels. The engineering pattern of the MNTs inside a 60 μm-long membrane channel enabled the creation of unique canister-like channel necks and cavities. The open-tubular canister architecture design provides controllable, reproducible, and one-step processing patterns of visual detection and rejection/permeation of oxyanion toxins such as selenite (SeO3(2-)) in aquatic environments (i.e., in ground and river water sources) in the Ibaraki Prefecture of Japan. The decoration of organic ligand moieties such as omega chrome black blue (OCG) into inorganic Al2O3@tubular SiO2/Al2O3 canister membrane channel cavities led to the fabrication of an optical nanomembrane sensor (ONS). The OCG ligand was not leached from the canister as observed in washing, sensing, and recovery assays of selenite anions in solution, which enabled its multiple reuse. The ONS makes a variety of alternate processing analyses of selective quantification, visual detection, rejection/permeation, and recovery of toxic selenite quick and simple without using complex instrumentation. Under optimal conditions, the ONS canister exhibited a high selectivity toward selenite anions relative to other ions and a low-level detection limit of 0.0093 μM. Real analytical data showed that approximately 96% of SeO3(2-) anions can be recovered from aquatic and wastewater samples. The ONS canister holds potential for field recovery applications of toxic selenite anions from water.