Outside-in stepwise bi-functionalization of magnetic mesoporous silica incorporated with Pt nanoparticles for effective removal of hexavalent chromium

Published on May 1, 2017in Powder Technology4.142
· DOI :10.1016/J.POWTEC.2017.02.028
Zhuoxian Mai4
Estimated H-index: 4
(SCAU: South China Agricultural University),
Yang Hu21
Estimated H-index: 21
(SCAU: South China Agricultural University)
+ 6 AuthorsWuyi Zhou11
Estimated H-index: 11
(SCAU: South China Agricultural University)
Sources
Abstract
Abstract In this study, novel bi-functional Fe 3 O 4 /mesoporous silica core/shell nanoparticles (FMSNs) modified by thiol groups ( SH) on their outer surfaces have been successfully synthesized through outside-in functionalization process, and then can be served as the three-dimensional porous supporting materials to complex with platinum ions in the mesoporous channels, where high-density amino groups ( NH 2 ) are grafted as the binding sites for chelating metal precursors in the inner of mesopores. Highly dispersed Pt nanoparticles are facilely generated and immobilized into the channel surfaces of FMSNs by an in-situ reduction using NaBH 4 as the reducing agent. The special FMSNs possess high Pt loading capacity (~ 10.38%), and can be acted as active heterogeneous catalysts for the reduction of toxic Cr(VI) to Cr(III) by using formic acid as the model reducing agent. The Pt-loaded FMSN catalysts can be facilely separated and collected by applying an outer magnetic field, and the catalysts can be reused for five times successively with excellent performance. We believe that the composites have large potential in the removal of Cr(VI) contamination from industrial waste-water in the future.
📖 Papers frequently viewed together
6 Authors (Yingze Cao, ..., Yen Wei)
16 Citations
20153.12RSC Advances
7 Authors (Yunqi Li, ..., Yusuke Yamauchi)
8 Citations
11 Authors (Yunqi Li, ..., Jun Xu)
1 Citations
References37
Newest
#1Małgorzata Zienkiewicz-Strzałka (UMCS: Maria Curie-Skłodowska University)H-Index: 8
#2Anna Deryło-Marczewska (UMCS: Maria Curie-Skłodowska University)H-Index: 20
Last. Stanisław Pikus (UMCS: Maria Curie-Skłodowska University)H-Index: 23
view all 3 authors...
Abstract This paper describes of preparation and characterization of new bimetallic materials based on platinum/silver, platinum/palladium and palladium/silver systems of nanoparticles supported on mesoporous ordered silica composite. In all investigated materials unusual ammine complexes of noble metals ([Pt (NH 3 ) 4 ]Cl 2 , [Ag(NH 3 ) 2 ]OH and [Pd(NH 3 ) 4 ]Cl 2 ) were used as nanoparticles sources. Bimetallic materials were synthesized by one-pot procedure or post synthesis modification via...
7 CitationsSource
#1Li Zhang (Huaibei Normal University)H-Index: 4
#2Xianliang Fu (Huaibei Normal University)H-Index: 38
Last. Shifu Chen (Huaibei Normal University)H-Index: 58
view all 6 authors...
Noble metal-modified CdS is one of the most promising photocatalysts for solar H2 production due to its intrinsic band structure merits. It is highly desirable to develop an effective preparation route to pursue a high photocatalytic performance and to minimize the use of costly noble metals. For the first time, a simple and convenient one-pot solvothermal (OPS) method was developed to prepare platinized CdS nanorods (Pt/CdS-N) in this work. The formation of a hexagonal 1D structure CdS and the ...
83 CitationsSource
#1Chao Zhang (SEU: Southeast University)H-Index: 18
#2Yuming Zhou (SEU: Southeast University)H-Index: 41
Last. Qianli Wang (SEU: Southeast University)H-Index: 12
view all 6 authors...
Abstract A synthetic strategy has been developed to encapsulate Pt nanoparticles in heterogeneous catalysts to prevent their sintering. This method involves the preparation of Pt/nanocarbon spheres composites, the formation of mesoporous silica layers, and finally the removal of CTAB surfactant and NCSs by refluxing and calcination, respectively. TEM images were used to confirm the success of each step, and the catalytic evaluation was tested on the reduction of p-NPh to p-APh monitored by a UV–...
11 CitationsSource
#1Seyed Ghorban Hosseini (MUT: Malek-Ashtar University of Technology)H-Index: 20
#2Rezgar Ahmadi (UKH: University of Kurdistan Hewler)H-Index: 5
Last. Abolfazl Kashi (MUT: Malek-Ashtar University of Technology)H-Index: 2
view all 4 authors...
Abstract In this study, mesoporous α-Fe 2 O 3 catalysts were synthesized from mesoporous silica SBA-15 as the hard template and iron nitrate as the iron oxide source via nanocasting strategy. In order to access the highest loading of iron oxide in the template pores, different weight ratios of Fe(NO 3 ) 3 ·9H 2 O/SBA-15 were used in the pore-filling step by two solvents process. The structural and textural properties of the SBA-15 template and α-Fe 2 O 3 -2.0 catalyst were characterized by means...
66 CitationsSource
#1Ren Juan (Sichuan University)H-Index: 1
#2Ning-Chao ZhangH-Index: 1
Last. Xiao-Juan Peng (CAEP: China Academy of Engineering Physics)H-Index: 1
view all 4 authors...
We report a first-principle study of hydrogen adsorption on Platinum (Pt)- and Palladium (Pd)-doped hexagonal boron nitride sheet. The results show that both isolate Pt and Pd atoms are preferred to locate on the top of N atom with binding energies of 5.028 and 4.113 eV, respectively. A maximum of three hydrogen molecules can chemically bind to single Pt/Pd atom, respectively, with the H–H bonds of H2 molecules significantly elongated. The average binding energies per H2 molecule for Pt-/Pd-dope...
13 CitationsSource
#1Zhen Zhu (Tianjin University of Technology)H-Index: 1
In this study, functionalized silica spheres (SMS) with a mesoporous structure were fabricated using stearic acid as a template and 3-(2-aminoethylamino)propyldimethoxymethylsilane as a cotemplate, under mild reaction conditions. SMS was prepared to develop efficient adsorbents for Cu(II), Pb(II), Cr(VI), and Cd(II) from aqueous solutions. The effect of the contact time, pH, initial metal concentration, temperature, and desorption were examined in batch experiments. The SMS displayed excellent C...
15 CitationsSource
#1Madhu Kumari (JNU: Jawaharlal Nehru University)H-Index: 2
#2Charles U. Pittman (MSU: Mississippi State University)H-Index: 82
Last. Dinesh Mohan (JNU: Jawaharlal Nehru University)H-Index: 86
view all 3 authors...
Abstract Magnetite nanospheres with hollow interiors were synthesized using a simple, one-pot, and template free solvothermal method with ferric chloride as the iron precursor. The composition, surface properties and morphology were studied using X-ray powder diffraction (XRD), energy dispersive X-ray fluorescence (EDXRF), Fourier transform infrared spectroscopy (FTIR), surface area analysis, point of zero charge (pH pzc ), scanning electron microscopy (SEM), transmission electron microscopy (TE...
216 CitationsSource
#1Kaining Gong (Hebei Normal University)H-Index: 7
#2Weijie Wang (Hebei Normal University)H-Index: 3
Last. Zhangang Han (Hebei Normal University)H-Index: 25
view all 4 authors...
Highly reduced molybdophosphates with the formula (H2bpp)6{Co[Mo6O12(OH)3(HPO4)3-(H2PO4)]2}2·13H2O (1), (H2bpp)6[Co(H2O)2]4{Co[Mo6O12(OH)3(HPO4)2(H2PO4)(PO4)]2}2·2(HPO4)·12H2O (2), [Na(H2O)]2[Co(mbpy)(H2O)3]2[Co(mbpy)(H2O)]2{Co[Mo6O12(OH)3(HPO4)3(PO4)]2}·8H2O (3), and Na2[Co(mbpy)(H2O)3]4{Co[Mo6O12(OH)3(HPO4)3(PO4)]2}·13H2O (4) (bpp = 1,3-bi(4-pyridyl)propane, mbpy = 5,5′-dimethyl-2,2′-dipyridyl) have been synthesized and characterized. The primary structure of an anionic moiety in 1–4 consists ...
45 CitationsSource
#1Fang Liu (SCAU: South China Agricultural University)H-Index: 4
#2Jingnan Wang (SYSU: Sun Yat-sen University)H-Index: 13
Last. Wuyi Zhou (SCAU: South China Agricultural University)H-Index: 13
view all 11 authors...
In this study, we propose outside-in stepwise functionalization of MCM-41-type mesoporous silica for use as a high-efficiency matrix drug delivery nanosystem aimed at the insoluble antibacterial agent fluoroquinolone. Thiol (–SH) modification on the surface of the nanocarrier and aminopropyl groups (–NH2) in the channels give the system a framework for sustained drug release for 72 h with drug loading capacity of 58.64% as a result of the completely opposite electrostatic interaction between dru...
18 CitationsSource
#1Li SunH-Index: 3
#2Zhigang YuanH-Index: 3
Last. Donggui HanH-Index: 1
view all 7 authors...
Abstract Fe 0 nanorods modified with chitosan in porous anodic alumina (PAA) were prepared as adsorbent. Adsorption of trace Cr(VI) onto adsorbent was tested as a function of solution pH value, initial Cr(VI) concentration and adsorption time. The results showed that PAA can limit the size, disperse Fe 0 nanorods and protect them from oxidation. In the adsorption process, it was found that both PAA and chitosan can supply bridges between Fe 0 nanorods and Cr(VI) through the surface electrostatic...
37 CitationsSource
Cited By11
Newest
#1Kiran Mumtaz (PINSTECH: Pakistan Institute of Nuclear Science and Technology)
#2Sajid Iqbal (PINSTECH: Pakistan Institute of Nuclear Science and Technology)H-Index: 7
Last. Bashir Ahmad (PINSTECH: Pakistan Institute of Nuclear Science and Technology)H-Index: 15
view all 6 authors...
Abstract null null We have successfully synthesized diphenylcarbazide functionalized mesoporous silica (DPC-SBA-15) for the selective removal of chromium (Cr(VI)) from aqueous solution. The structural characteristics and the surface modification of DPC-SBA-15 were investigated by small-angle XRD, SEM, HR-TEM, FTIR, and CHNS elemental analysis techniques. Results showed that the mesoporosity and long-range structural ordering of SBA-15 were well-maintained before and after the functionalization. ...
Source
#1Zhuoxian Mai (SCAU: South China Agricultural University)H-Index: 4
#2Jiali Chen (Southern Medical University)H-Index: 3
Last. Zhou Wuyi
view all 8 authors...
Curcumin (Cur), as a natural product, has demonstrated potential anticancer activities against various types of cancers. However, its therapeutic efficacy was greatly limited as the result of poor solubility and instability. To address these limitations, we create a new type of hollow mesoporous titania nanoparticle (HMTN) to encapsulate Cur while HMTN was decorated with a layer of hydrophilic polyethylenimine (PEI), which controls the release rate of Cur inside the pore due to its dendritic str...
1 CitationsSource
#1Zahoor H. Farooqi (University of the Punjab)H-Index: 27
#2Muhammad Waseem Akram (University of the Punjab)H-Index: 1
Last. Ahmad Irfan (King Khalid University)H-Index: 28
view all 5 authors...
Abstract Hexavalent Chromium [Cr(VI)] is a highly carcinogenic and toxic material. It is one of the major environmental contaminants in aquatic system. Its removal from aqueous medium is a subject of current research. Various technologies like adsorption, membrane filtration, solvent extraction, coagulation, biological treatment, ion exchange and chemical reduction for removal of Cr(VI) from waste water have been developed. But chemical reduction of Cr(VI) to Cr(III) has attracted a lot of inter...
15 CitationsSource
#1Sheng Wang (Guilin University of Technology)H-Index: 2
#2Baolin Zhang (Guilin University of Technology)H-Index: 9
Last. Jie Tan (GLMU: Guilin Medical University)H-Index: 4
view all 9 authors...
: The impact of the surface modification on the subcellular distribution of nanoparticles in the brain remains elusive. The nanoparticles prepared by conjugating polyethylene glycol and maleic anhydride-coated superparamagnetic iron oxide nanoparticles (Mal-SPIONs) with bovine serum albumin (BSA/Mal-SPIONs) and with Arg-Gly-Asp peptide (RGD/Mal-SPIONs) were injected into the rat substantia nigra. Observation of transmission electron microscopy (TEM) samples obtained 24 h after perfusion showed t...
6 CitationsSource
#1Qing-yun Zhu (NU: Nanjing University)H-Index: 4
#2Ling-yu Zhao (NU: Nanjing University)H-Index: 6
Last. Xiao-bing Cui (Nanjing University of Chinese Medicine)H-Index: 4
view all 8 authors...
Abstract Carboxyl-group functionalized mesoporous silica (CFMS) prepared by one-pot co-condensation method was employed for the solid phase extraction (SPE) of chromium species for the first time. A new approach of SPE coupled to inductively coupled plasma mass spectrometry (ICP-MS) was thus established for the speciation of chromium in environmental water samples. The influences of pH, volume of sample, extraction time, amount of adsorbent, elution conditions, co-existing ions and adsorption ca...
21 CitationsSource
#1Yiyuan B. Yin (Rice University)H-Index: 3
#2Sujin Guo (Rice University)H-Index: 8
Last. Michael S. WongH-Index: 57
view all 6 authors...
Consideration of the water–energy–food nexus is critical to sustainable development, as demand continues to grow along with global population growth. Cost-effective, sustainable technologies to clean water of toxic contaminants are needed. Oxyanions comprise one common class of water contaminants, with many species carrying significant human health risks. The United States Environmental Protection Agency (US EPA) regulates the concentration of oxyanion contaminants in drinking water via the Nati...
25 CitationsSource
#1Zhijie Zhang (Tongji University)H-Index: 7
#2Lei Sun (Henan University)H-Index: 21
Last. Rui Liu (Tongji University)H-Index: 37
view all 3 authors...
Pt nanoparticle (NP) embedded polystyrene-b-poly(4-vinylpyridine) colloids (Pt@PS-b-PVP) are prepared through flash nanoprecipitation (FNP). Uniform Pt@PS-b-PVP nanocomposites with ~5 nm Pt NPs decorating the surface on PS-b-PVP nanospheres are easily prepared with tunable size and Pt arrangement. The catalytic chromium reduction property of Pt@PS-b-PVP is tested. The hybrid colloids exhibited excellent catalytic performance as well as tunable ability dependent on the fined-controlled nanostruct...
5 CitationsSource
#1Zhuoxian Mai (SCAU: South China Agricultural University)H-Index: 4
#2Jiali Chen (Southern Medical University)H-Index: 3
Last. Zhou Wuyi (SCAU: South China Agricultural University)
view all 9 authors...
Abstract Vitamin E (VE) exerts promising antioxidant activities against free radicals. However, its therapeutic efficacy and practical application are greatly restricted as a result of poor solubility, instability and low bioavailability. In this work, novel amino functionalized mesoporous silica nanoparticles (MSNs) were employed as the smart carriers to encapsulate Vitamin E acetate by the combination of soft-template method and recrystallization approach. Typically, two different surfactants ...
20 CitationsSource
#1Mohamed E. Mahmoud (Alexandria University)H-Index: 48
#1Mohamed Ehab Mahmoud (Alexandria University)
Last. Mostafa E. Sobhy (Alexandria University)H-Index: 2
view all 3 authors...
Abstract A novel nanosorbent is designed via crosslinking of nanolayer carboxymethyl cellulose (CMC) onto the surface of nano‑zirconium oxide (Nano-ZrO 2 ) using glutaraldehyde for the formation of Nano-ZrO 2 -glu-CMC. The nanosorbents were characterized using TGA, SEM, HR-TEM, FT-IR and surface area analysis. The particle size of Nano-ZrO 2 -glu-CMC was 22–39 nm. The potential implementation of Nano-ZrO 2 -glu-CMC sorbent for selective speciation and extraction of chromium ions from real water ...
23 CitationsSource
#1Guo Zizhang (WSU: Washington State University)H-Index: 4
#2Jian Zhang (SDU: Shandong University)H-Index: 37
Last. Yan Kang (SDU: Shandong University)H-Index: 10
view all 4 authors...
Abstract This work presents a one-step method for preparing a nitrogen-functionalized carbon adsorbent derived from biomass by diammonium hydrogen phosphate (DAP) activation for Cr(VI) removal. The activation mechanisms and nitrogen functionality were measured by thermogravimetric analysis. The effects of the preparation parameters on the properties of the final carbon adsorbent were examined by N 2 adsorption/desorption and Boehm's titration. The optimum parameters of preparation are a heating ...
23 CitationsSource