Silver-decorated ZIF-8 derived ZnO concave nanocubes for efficient photooxidation-adsorption of iodide anions: An in-depth experimental and theoretical investigation

Chen, Jiuyu; Gu, Aotian; Miensah, Elvis Djam; Liu, Ying; Wang, Peng; Mao, Ping; Gong, Chunhui; Yan, Jiao; Chen, Kai; Zhang, Zongxiang; Yang, Yi

doi:10.1016/j.jssc.2021.122039

Cited by 20 publications

(4 citation statements)

References 57 publications

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“…Examples include calcined layered double hydroxides (LDH), ion-exchange resin, compounds containing Bi(III) or Cu(0, I, II), and Ag-based functionalized materials . Among these, Ag-based functionalized materials are preferred due to their high affinity with iodide, superior adsorption capacity, fast adsorption kinetics, high tolerance to competitive anions, and acid-stability. , Nevertheless, the unfavorable economic feasibility of silver metal hinders its widespread practical application. Therefore, various supporting matrices have been employed to load Ag nanoparticle, reducing the usage of silver and aiding in the improved distribution of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of Silver-Decorated Reduced Graphene Oxide Nanocomposites for Effective Elimination of Iodide Anions from Water

Pan,

Zhou,

Nie

et al. 2024

ACS EST Water

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Water contamination by radioactive iodide raises public concerns due to potential threats to human health and ecosystems. In this study, we synthesized Ag/RGO-4, anchoring nanosilver (Ag) onto reduced graphene oxide (RGO), and verified its efficacy for selective iodide removal. The structure, surface morphology, and functional group composition of the composite material were thoroughly characterized. Iodide adsorption properties, encompassing pH effect, kinetics, equilibrium isotherm, anions' influence, and column test, were systematically evaluated. Batch tests revealed that RGO addition increased silver's iodide adsorption capacity from 0.87 to 2.06 mmol g −1 at neutral pH. pH variations had minimal impact, as Ag/RGO-4 relied on AgI precipitate formation. The maximum adsorption capacity was 2.9 mmol g −1 . Ag/RGO-4 selectively removed iodide in the presence of interfering anions (CO 3 2− , SO 4 2− , NO 3 − , Cl − ) at 266 mmol L −1 , with minimal iodide removal enhancement. After batch test analysis and using comprehensive analytical techniques (XRD, SEM, TEM, FTIR, and XPS), a plausible adsorption mechanism emerged. Hypothesized is the initial oxidation of Ag by C=O groups on RGO in Ag/RGO-4, producing Ag + , leading to iodide sequestration as AgI. The material holds promise for treating iodide-contaminated water from nuclear incidents and nuclear medicine.

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Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of Silver-Decorated Reduced Graphene Oxide Nanocomposites for Effective Elimination of Iodide Anions from Water

Pan,

Zhou,

Nie

et al. 2024

ACS EST Water

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“…Ag and its composite materials are usually used as promising catalysts due to their inexpensive cost, high catalytic activity, and stability [17][18][19][20]. Ag-anchored ZIFs have shown promising synergetic applications [21][22][23]. Research has demonstrated that Ag is capable of converting CO 2 to CO with a high faradaic efficiency (FE), although the current density remains low [24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Silver-Doped Zeolitic Imidazolate Framework (Ag@ZIF-8): An Efficient Electrocatalyst for CO2 Conversion to Syngas

Usman

Suliman

2023

Catalysts

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To enable the reuse of carbon dioxide (CO2), electrocatalytic reduction of CO2 (CO2RR) into syngas with a controllable H2/CO ratio is considered a cost-effective and intriguing approach. Here, a number of silver (Ag)-doped, zeolitic imidazole framework composites were prepared by a facile method. The outcomes demonstrate that CO2 electroreduction on Ag-doped ZIF-8 catalysts produces just CO and H2, without having any liquid fuel, resulting in a total faradaic efficiency approaching 100%. The most optimal Ag-Zn-ZIF-8 (10% Ag, 90% Zn) demonstrates good selectivity for syngas (CO and H2) that can be easily adjusted from 3:1 to 1:3 (H2/CO) by changing the applied voltage during the CO2 conversion process.

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“…Nevertheless, low sunlight performance and occurrence of the photo-corrosion are the main drawbacks influencing the practical application of ZnO [ 27 ]. According to the literatures, ZnO was synthesized by various routes [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Among these techniques, a chemical precipitation method has been used to prepare the semiconducting nanomaterials, which have the benefits of being inexpensive, simple, and easy to control [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…Synthesis of various metal-decorated semiconductors has been demonstrated [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. The Ag/ZnO photocatalyst provides an enhanced photocatalytic performance compared to the bare ZnO, due to a dramatic increase of charge carries separation rate at the interface [ 9 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]. Silver/ZnO photocatalysts have been prepared by using numerous methods [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ].…”

Section: Introductionmentioning

confidence: 99%

Ag-Modified ZnO for Degradation of Oxytetracycline Antibiotic and Reactive Red Azo Dye

et al. 2022

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It is known that low electron-hole separation efficiency is the major disadvantage influencing low photoactivity of the UV-active ZnO photocatalyst. To solve this drawback, the excellent fabrication technique has been used to disperse silver metal on ZnO surface. In this study, an addition of silver content up to 15 wt% was carried out. The 5Ag-ZnO sample, comprising 5 wt% of silver metal, displayed a hexagonal wurtzite structure, and a band gap of 3.00 eV, with high sunlight-active photocatalytic performance of 99–100% and low photo-corrosion problem. The complete degradation of oxytetracycline (OTC) antibiotic and reactive red dye 141 (RR141) dye under natural sunlight was achieved. The highest rate constant of 0.061 min−1 was detected. The enhancement of the performance is mainly due to lowering of the electron-hole recombination rate. Dispersion of silver on ZnO causes the generation of the Schottky barrier at the interface between Ag and ZnO, so that improvement of quantum efficiency and enhancement of the resultant photoactivity could be expected. Furthermore, good distribution of metallic silver also causes a red shift in absorption of light toward the visible spectrum. This is strongly attributed to the surface plasmon resonance effect, which occurred after successful decoration of the noble metal on ZnO. The photocatalyst, with great structural stability, still maintains high photocatalytic efficiency even after five times of use, implying its excellent cycling ability. The present finding offers a new road to generate a silver decorated ZnO photocatalyst for the complete removal of dye and antibiotics contaminated in the environment.

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Silver-decorated ZIF-8 derived ZnO concave nanocubes for efficient photooxidation-adsorption of iodide anions: An in-depth experimental and theoretical investigation

Cited by 20 publications

References 57 publications

One-Step Synthesis of Silver-Decorated Reduced Graphene Oxide Nanocomposites for Effective Elimination of Iodide Anions from Water

One-Step Synthesis of Silver-Decorated Reduced Graphene Oxide Nanocomposites for Effective Elimination of Iodide Anions from Water

Silver-Doped Zeolitic Imidazolate Framework (Ag@ZIF-8): An Efficient Electrocatalyst for CO2 Conversion to Syngas

Ag-Modified ZnO for Degradation of Oxytetracycline Antibiotic and Reactive Red Azo Dye

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