Robust transparent mesoporous silica membranes as matrices for colorimetric sensors

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16549-16553 ◽  
Author(s):  
Donghun Kim ◽  
Bradley F. Chmelka
Keyword(s):  
Heavy Metal ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection ◽  
High Surface ◽  
Silica Membranes ◽  
Surface Areas ◽  
Functionalized Mesoporous Silica ◽  
Colorimetric Sensors

Transparent functionalized mesoporous silica membranes have been prepared with high surface areas (∼500 m2 g−1) that exhibit high sensitivities for colorimetric detection and sensing of dilute heavy-metal ions (e.g., Pb2+).

Size-adjustable annular ring-functionalized mesoporous silica as effective and selective adsorbents for heavy metal ions

RSC Advances ◽  
2013 ◽  
Vol 3 (48) ◽  
pp. 25686 ◽  
Author(s):  
Fa-Kuen Shieh ◽  
Chia-Teng Hsiao ◽  
Hsien-Ming Kao ◽  
Yu-Chein Sue ◽  
Kuan-Wei Lin ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Annular Ring ◽  
Functionalized Mesoporous Silica

scholarly journals Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

2020 ◽  
Vol 70 (338) ◽  
pp. 220
Author(s):  
P. Chen ◽  
X. Chen ◽  
Y. Wang ◽  
P. Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Surface ◽  
Exchange Capacity ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Ion Exchange Capacity ◽  
Surface Areas ◽  
Preliminary Study

This study proposes a method to convert non-structural calcium-rich construction and demoli­tion waste fines into adsorbents of heavy metal ions by mixing waste fines with diammonium hydrogen phos­phate solution to produce hydroxyapatite, which has high surface areas and excellent ion-exchange capacity with heavy metal ions. As a result, environmental polluting waste is converted into environmentally cleaning material. Waste putty powders was chosen as the representative waste to investigate the detailed formation process of hydroxyapatite and the key reaction parameters of the reaction. Results showed that hydroxyapatite can be pro­duced on waste putty particles. Higher ageing temperatures or longer ageing duration are beneficial to the yield and crystallinity of the produced hydroxyapatite. Adsorption testing confirmed that Ni2+ can replace Ca2+ in the hydroxyapatite lattice, leading to the formation of a new crystal, arupite (Ni3(PO4)2•8H2O), and contributing to a modest adsorption capacity for Ni2+ (15 mg/g) for the hydroxyapatite-containing waste putty.

Colorimetric detection of heavy metal ions in water via metal-organic framework

2019 ◽  
Vol 486 ◽  
pp. 69-73 ◽  
Author(s):  
Jiwon Kim ◽  
Jung Suk Oh ◽  
Kyoung Chul Park ◽  
Gajendra Gupta ◽  
Chang Yeon Lee
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Organic Framework ◽  
Colorimetric Detection ◽  
Metal Organic ◽  
Organic Framework

Ionic liquid assisted mesoporous silica-graphene oxide nanocomposite synthesis and its application for removal of heavy metal ions from water

2020 ◽  
Vol 239 ◽  
pp. 122028 ◽  
Author(s):  
Bapun Barik ◽  
Aniket Kumar ◽  
Pratap S. Nayak ◽  
L. Satish K. Achary ◽  
Lipeeka Rout ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Ionic Liquid ◽  
Graphene Oxide ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions

scholarly journals Functionalized Mesoporous Silica Membranes for CO2Separation Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Hyung-Ju Kim ◽  
Hee-Chul Yang ◽  
Dong-Yong Chung ◽  
In-Hwan Yang ◽  
Yun Jung Choi ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Molecular Sieves ◽  
Three Dimensional ◽  
Molecular Transport ◽  
Advanced Materials ◽  
Silica Membranes ◽  
Surface Areas ◽  
Functionalized Mesoporous Silica ◽  
Potential Applications ◽  
And Performance

Mesoporous silica molecular sieves are emerging candidates for a number of potential applications involving adsorption and molecular transport due to their large surface areas, high pore volumes, and tunable pore sizes. Recently, several research groups have investigated the potential of functionalized mesoporous silica molecular sieves as advanced materials in separation devices, such as membranes. In particular, mesoporous silica with a two- or three-dimensional pore structure is one of the most promising types of molecular sieve materials for gas separation membranes. However, several important challenges must first be addressed regarding the successful fabrication of mesoporous silica membranes. First, a novel, high throughput process for the fabrication of continuous and defect-free mesoporous silica membranes is required. Second, functionalization of mesopores on membranes is desirable in order to impart selective properties. Finally, the separation characteristics and performance of functionalized mesoporous silica membranes must be further investigated. Herein, the synthesis, characterization, and applications of mesoporous silica membranes and functionalized mesoporous silica membranes are reviewed with a focus on CO2separation.

scholarly journals Recent Progress in Heavy Metal Ion Decontamination Based on Metal–Organic Frameworks

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1481
Author(s):  
Yajie Chen ◽  
Xue Bai ◽  
Zhengfang Ye
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
Environmental Safety ◽  
Surface Areas ◽  
Effective Removal ◽  
Pore Size Distributions ◽  
Metal Organic

Heavy metals are inorganic pollutants which pose a serious threat to human and environmental safety, and their effective removal is becoming an increasingly urgent issue. Metal–organic frameworks (MOFs) are a novel group of crystalline porous materials, which have proven to be promising adsorbents because of their extremely high surface areas, optimizable pore volumes and pore size distributions. This study is a systematic review of the recent research on the removal of several major heavy metal ions by MOFs. Based on the different structures of MOFs, varying adsorption capacity can be achieved, ranging from tens to thousands of milligrams per gram. Many MOFs have shown a high selectivity for their target metal ions. The corresponding mechanisms involved in capturing metal ions are outlined and finally, the challenges and prospects for their practical application are discussed.

[Fe(CN)6]4− decorated mesoporous gelatin thin films for colorimetric detection and as sorbents of heavy metal ions

2013 ◽  
Vol 42 (36) ◽  
pp. 13265 ◽  
Author(s):  
Li Shi ◽  
Hubiao Huang ◽  
Luwei Sun ◽  
Yanping Lu ◽  
Binyang Du ◽  
...  
Keyword(s):  
Thin Films ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Colorimetric Detection

Modified SBA-15 mesoporous silica for heavy metal ions remediation

Chemosphere ◽  
2008 ◽  
Vol 73 (9) ◽  
pp. 1499-1504 ◽  
Author(s):  
Mihaela Mureseanu ◽  
Aurora Reiss ◽  
Ioan Stefanescu ◽  
Elena David ◽  
Viorica Parvulescu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mesoporous Silica ◽  
Metal Ions ◽  
Heavy Metal Ions
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