Adsorption Capacity For Ag Research Articles

Design of Recyclable Adsorbent for Water Pollutants Based on Chitosan-Coated Carboxymethyl Cellulose-Calcium Alginate Wrapped Iron Oxide-Copper Oxide Composite Beads

ABSTRACT In this study, an efficient nanocomposite based on calcium alginate-carboxymethyl cellulose/iron oxide-copper oxide (CA-CMC/Fe2O3-CuO) is developed in beads form and utilized as nanoadsorbent and nanocatalyst. Further, the beads were coated with chitosan, resulting in Cs@CA-CMC/Fe2O3-CuO beads. The prepared beads exhibited exceptional adsorption capabilities for selected heavy metal ions. Notably, the Cs@CA-CMC/Fe2O3-CuO beads displayed remarkable adsorption among the other beads toward the three selected metal ions. Ag(I) was highly adsorbed by Cs@CA-CMC/Fe2O3-CuO beads, and the adsorption capacity of beads was 4.91 mgg−1, while 4.5 mgg−1 and 3.0 mgg−1 for Co(II) and Ni(II), respectively. Beads’ ability to adsorb Ag(I) varied depending on several factors. It was observed that the adsorption capacity of Ag(I) ions increased as the interaction time and metal concentration rose. However, increasing the beads dose led to a decrease in the Ag(I) ion adsorption. Further, the waste beads after Ag(I) adsorption were treated with reducing agent to form beads supported Ag nanoparticles (Ag/Cs@CA-CMC/Fe2O3-CuO) and used as effective catalyst for reducing 4-nitrophenol in the presence of NaBH4 as a reducing agent. Ag/Cs@CA-CMC/Fe2O3-CuO achieved reduction up to 93% for 4-NP within 30 min. The designed nanocomposite beads displayed several desirable attributes, including eco-friendliness and robust catalytic performance, making them highly promising for useful reduction of 4-NP.

Fe nanoparticle-functionalized ordered mesoporous carbon with tailored mesostructures and their applications in magnetic removal of Ag(i)

Abstract Fe nanoparticle-functionalized ordered mesoporous carbon (Fe0/OMC) was synthesized using triblock copolymers as templates and through solvent evaporation self-assembly, followed by a carbothermal reduction. Fe0/OMC had three microstructures of two-dimensional hexagonal (space group, p6mm, Fe0/OMC-1), body centered cubic (Im3̄m, Fe0/OMC-2), and face centered cubic (Fm3̄m, Fe0/OMC-3) which were controlled by simply adjusting the template. All Fe0/OMC displayed paramagnetic characteristics, with a maximum saturation magnetization of 50.1 emu·g−1. This high magnetization is advantageous for the swift extraction of the adsorbent from the solution following the adsorption process. Fe0/OMC was used as an adsorbent for the removal of silver ions (Ag(i)) from aqueous solutions, and the adsorption capacity of Fe0/OMC-1 was enhanced by the functionalization of Fe0. Adsorption property of Fe0/OMC-1 was significantly higher than that of Fe0/OMC-2 and Fe0/OMC-3, indicating that the long and straight ordered pore channels were more favorable for adsorption, and the adsorption capacity of Ag(i) on Fe0/OMC-1 was 233 mg·g−1. The adsorption process exhibited conformity with both the pseudo-second-order kinetic model and the Freundlich model, suggesting that the dominant mechanism of adsorption involved multilayer adsorption on heterogeneous surfaces.

Adsorption performance of sulfur-decorated polyamidoamine dendrimers/silica for Ag(I) and Cu(II)

Water pollution aroused by heavy metal poses great damage to environmental safety. Polyamidoamine (PAMAM) dendrimers display great advantages in preparation efficient adsorbents to decontaminate heavy metal ions. Herein, sulfur-decorated PAMAM dendrimers/silica (G0-MT, G1-MT and G2-MT) were constructed by using alkoxysilyl-containing PAMAM dendrimers as precursor. G0-MT, G1-MT and G2-MT were employed for removing Ag(I) and Cu(II) from water solution. The adsorption capacity for Ag(I) and Cu(II) follows the order of G0-MT < G2-MT < G1-MT and G0-MT < G1-MT < G2-MT, respectively. The maximum adsorption capacity of the composites for Ag(I) and Cu(II) are 1.38 and 0.78 mmol g−1, which are superior to the corresponding adsorbents that synthesized by chemical modification method. Adsorption kinetic indicates the saturated adsorption for Ag(I) and Cu(II) can be reached at 150 and 270 min. The adsorption for the ions could be boosted by raising metal ion concentration and adsorption temperature. Adsorption mechanism demonstrates S atoms dominate the adsorption, while O and N atoms participate in the adsorption. The noticeable adsorption capacity and regeneration property enable the composites to be promising candidate for efficient removing aqueous Ag(I) and Cu(II).

Tailored Zeolitic Imidazolate Framework (TSC‐ZIF) for water purification: Evaluating TSC‐ZIF affinity towards heavy metal ions in multi‐metal solutions

In response to the growing concerns surrounding water pollution and the presence of multiple metal ions in environmental matrices, we conducted a comprehensive study to explore the potential of a thiosemicarbazone Schiff base in the Zeolitic Imidazolate Framework (TSC‐ZIF‐1) as an efficient adsorbent for removing harmful metal ions from aqueous solutions. Our investigation assessed the adsorption capacity and efficiency of TSC‐ZIF 1 towards three key metal ions—Hg(II), Ag(I), and Pb(II)—in homo‐ionic, tertiary, and multi‐metal ion systems. TSC‐ZIF 1 exhibited unprecedented adsorption behavior towards all three metal ions in the homo‐ionic system, with the Langmuir isotherm models fitting well (R2 ~ 0.98 to 0.99). The maximum adsorption capacities were found to be 1,667 mg/g for Hg(II), as previously reported; 285 mg/g for Ag(I); and 769 mg/g for Pb(II); these values serve as baseline values. Subsequently, we conducted a comparative analysis for a tertiary system, Hg(II)/Ag(I)/Pb(II), where the three metals co‐existed in one solution. The adsorption capacity for each metal ion was reduced to varying extents; notably, the adsorption capacity for Pb(II) experienced the most significant reduction, reaching a qm value of 57 mg/g, representing an ~93% decrease compared to the homo‐ionic metal system. Conversely, the adsorption capacity for Ag(I) exhibited a minor decrease of ~3%. Despite a decrease in the adsorption capacity for Hg(II) by approximately 34%, the removal capacity remains the highest among the other metals. Our investigation of the competitive adsorption among the metal ions in the Hg(II)/Ag(I)/Pb(II) system revealed an antagonistic effect, indicating strong adsorption competition for available sites on TSC‐ZIF 1. When extending this study to a more complex multi‐metal ion system containing six metal ions, TSC‐ZIF 1 exhibited high selectivity (higher than 60% removal) towards Hg(II), Ag(I), and Pb(II) in a multi‐ionic system, including Hg(II), Ag(I), Pb(II), Cd(II), Ni(II), and Mg(II).

Anion-Controlled Assembly of a Silver-Responsive Bifunctional Coordination Polymer with Detection and Large Adsorption Capacity.

The recognition and adsorption of silver ions (Ag+) from industrial wastewater are necessary but still challenging. Herein, we constructed four Zn(II)-based coordination polymers (CPs), namely, [Zn(btap)2(NO3)2]n (1), [Zn(btap)(SO4)(H2O)3]n (2), {[Zn(btap)2(H2O)2]·(ClO4)2}n (3), and [Zn(btap)Cl2]n (4), by using 3,5-bis(triazol-1-yl)pyridine (btap) with different anionic Zn(II) salts. The crystal structures of 1-4, varying from one-dimensional beaded (1) and zigzag chain (2) to two-dimensional sql (3) and bex (4) typologies, were regulated by the coordination modes of btap and the counter-anions. The water stability, pH stability, thermostability, and luminescent properties of the CPs were investigated. The luminescence performances in a series of cations and anions were also explored. Considering the high density of chloride groups in the structure, 4 showed luminescence sensing for Ag+ [KSV = 9188.45 M-1 and a limit of detection (LOD) of 4.9 μM], as well as an excellent ability for Ag+ adsorption in aqueous solution (maximum adsorption capacity, 653.3 mg/g). Additionally, anti-interference experiments revealed that 4 had excellent recognition and adsorption capacities for Ag+ even when multiple ions coexisted. Moreover, XRD, EDS, and XPS analyses confirmed that the coordination of Ag+ with chloride groups in 4 resulted in excellent adsorption capacity and prevented ligand-to-ligand electron transfer, showing excellent detection ability. Suitable coordination sites were introduced to interact strongly with Ag+, along with detection and large adsorption capacity. Our strategy can effectively design and develop multifunctional CP-based materials, which are applicable in removal processes and environmental protection, by regulating anions in the self-assembly and introducing CP functional groups.

Green synthesis of silver nanoparticles doped activated carbon for Rhodamine B dye adsorption

Abstract Application of dye is one of the major industry with various application from everyday attire to food colouring. However, dye pollution is serious and threatening issue that need to be address to avoid harmful effect towards humans, animals and environments. In this study, silver nanoparticles (Ag NPs) were synthesised via Clitoria Ternatea (CT) flower extract and doped with activated carbon (Ag NPs/AC) to act as adsorbent in removing rhodamine B dye (RB). CT Flower mediated green synthesis for Ag NPs provide safe, low cost and sustainable method compared to conventional chemical and physical synthesis. UV-visible spectroscopy was used to analyse the green synthesis for the formation of Ag NPs with peak absorbance at 400 nm. The effect of activated carbon (AC) mass loading, contact time and adsorbent dosage were analysed to study the adsorption capacity of Ag NPs/AC with viable condition of 0.75 g AC mass and 30 mg dosage with complete removal at 90 minutes. Hence, incorporation of Ag NPs with AC contributes to better adsorption properties for the removal of RB dye.

Perfluorinated conjugated microporous polymer for targeted capture of Ag(I) from contaminated water

The maximum targeted capture silver from contaminated water is urgently necessary for sustainable development. Herein, the perfluorination conjugated microporous polymer adsorbent (F-CMP) has been fabricated by Sonogashira-Hagihara coupling reaction and employed to remove Ag(I) ions. Characterizations of NMR, XPS and FT-IR indicate the successful synthesis of F-CMP adsorbent. The influence factors of F-CMP on Ag(I) adsorption behavior are studied, and the adsorption capacity of Ag(I) reaches 251.3 mg/g. The experimental results of isothermal adsorption and kinetic adsorption are consistent with the Freundlich model and pseudo-second-order isothermal adsorption model, which follows a multilayer adsorption behavior on the uniform surface of the adsorbent, and the chemical adsorption becomes the main rate-limiting step. Combined with DFT calculation, the adsorption mechanism of Ag(I) by F-CMP is elucidated. The peaks shift of sp before and after adsorption is larger than that of F1s, suggesting that the –CC– on the F-CMP becomes the dominant chelation site of Ag(I). Furthermore, F-CMP exhibits specific adsorption for Ag(I) in polymetallic complex water, with the maximum selectivity coefficient of 31.5. Our study may provide a new possibility of perfluorinated CMPs for effective capture of Ag(I) ions to address environmental issues.

Novel reusable hydrogel adsorbents for precious metal recycle

A novel polyethylene glycol diacrylate-allylthiourea (ATU-PEGDA) hydrogel was simply synthesized through photo-reaction. Modified thiourea simultaneously employed chelation and electrostatic force to selectively recycle Ag(I) and Pd(II) from electrolytic wastewater. Sorption efficiency was nearly 100% for Ag(I) and Pd(II), which occurred at initial pH of 1 within 300 min. The adsorption characteristics of ATU-PEGDA followed Langmuir isotherm model and the maximum adsorption capacity of Ag(I) and Pd(II) achieved 83.33 and 152.81 mg g−1 sorbent, respectively where Pseudo-first order model demonstrate the adsorption kinetics. In the presence of other heavy metals, ATU-PEGDA performed high selectivity, 0.89 and 1.31 towards Ag(I) and Pd(II). ATU-PEGDA can be completely regenerated within 120 min using 0.5 M thiourea—0.001 M HNO3 and 1 M thiourea—4 M HCl after the adsorption of Ag(I) and Pd(II), respectively. Thiourea-branched structure was created after regeneration, improving the adsorption capacity. Compared to initial hydrogel, the adsorption capacity of Ag(I) and Pd(II) increased 31.83 ± 3.08% and 75.12 ± 11.02%, respectively. Over 10 consecutive adsorption–desorption cycles, ATU-PEGDA performed 111.34 and 263.79 mg g−1 sorbent in adsorption capacity of Ag(I) and Pd(II). Chromism of ATU-PEGDA hydrogel was a benefit to determine adsorption saturation and completely desorption of Ag(I) and Pd(II). Potentially, ATU-PEGDA can be extended to industrial applications.

Tunable amine-functionalized silsesquioxane-based hybrid networks for efficient removal of heavy metal ions and selective adsorption of anionic dyes

By changing the acid scavenger from NEt3 to NaHCO3, two novel kinds of amine-functionalized silsesquioxane (SQ)-based hybrid networks (PCS-N1, PCS-N2) with different molar ratios of –NH2/NH– and NH3+ were successfully prepared via nucleophilic substitution of octa(3-chloropropyl) silsesquioxane (SQ-Cl8) with triaminoethylamine, respectively. Both networks were fully characterized by FTIR, SEM, TEM, XPS, BET, TGA, WCA and solid-state 13C and 29Si NMR spectra. No porosity was observed for these two hybrid networks; however, they exhibited good thermal stability and hydrophilicity. To our surprise, they strongly adsorb heavy metal ions due to ion exchange and coordination. The adsorption capacities for Ag+ and Hg2+ are as high as 358 ± 6 and 721 ± 5 mg g−1, respectively. More interestingly, PCS-N1 can selectively adsorb the anionic dye methyl orange with a capacity as high as 731 ± 13 mg g−1. Furthermore, they regenerate easily and offer potential for water purification. This work provides a new approach to prepare and tune amine-functionalized SQ-based networks for multipurpose.

Formaldehyde Gas Adsorption in High‐Capacity Silver‐Nanoparticle‐Loaded ZIF‐8 and UiO‐66 Frameworks

AbstractMetal‐organic framework (MOF) compounds ZIF‐8 and Uio‐66 were synthesized by the solvent‐thermal method; then loaded with silver nanoparticles and studied to determine their adsorption of formaldehyde gas. The results showed that when the loading of silver nanoparticles was 2.5 wt%, Ag NPs@ZIF‐8 had the highest adsorption rate for formaldehyde gas, with the adsorption capacity 8.2‐11.5 times greater than that of ZIF‐8. When the loading of silver nanoparticle was 5 wt%, the adsorption capacity of Ag NPs@Uio‐66 for formaldehyde gas was 1.75 times higher than that of Uio‐66.

Electrocatalytic activity for dopamine of silver nanoparticle onto graphene/poly(1,8-diaminonaphthalene) electrodes

In this research, we report on the synthesis and electrochemical characterization of a poly(1,8-diaminonaphthalene)/graphene composite film which is capable to adsorb Ag+ ions toward to the dopamine sensing application. The present of graphene significantly improved the structural morphology and electrochemical activities of the pristine polymer, the adsorption capacity for Ag+ ions and the conductivities of the composite were enhanced. The graphene/poly(1,8-diaminonaphthalene)-Ag modified glassy carbon electrode was used to the ability of electrocatalytic activity dopamine in phosphate buffer solution by differential pulse voltammetry. The results open up the path for designing other dopamine sensing based on our novel approach.

Ag+ ions imprinted cryogels for selective removal of silver ions from aqueous solutions

ABSTRACTThe removal of heavy metal ions from aquatic media or any conditions is crucial. Silver ions turn out to be the important example of this problem on earth when these are released to the environment. In the present study, silver ions (Ag+) imprinted poly(hydroxyethyl methacrylate) (PHEMA)-based cryogels were prepared using N-methacryloyl-L-cysteine as functional monomer, to be chelated with Ag+ ions. The maximum adsorption capacity of Ag+-imprinted polymeric cryogel was found to be 49.27 mg/g from aqueous solutions. To investigate the affinity of Ag+-imprinted PHEMAC cryogel column, photographic film material from the natural silver ion source was used. The recovery results were 72.8% for the Ag+-imprinted PHEMAC cryogel and 0.62% for the non-imprinted PHEMAC cryogels. These values clearly showed the selectivity of the Ag+-imprinted PHEMAC cryogel column. The adsorption–desorption cycle was performed more 10 times with use of the same Ag+-imprinted PHEMAC cryogel for the determination of reuse. These molecularly imprinted cryogels were used in adsorption process for a long time with no significant loss.

Preparation of Fluorescent Thiol Group‐Functionalized Silica Microspheres for the Detection and Removal of Silver Ions in Aqueous Solutions

We demonstrate that silica microspheres can act as a sensitive fluorescent sensor and adsorbent of Ag+ in aqueous media. These thiol‐functionalized silica microspheres are doped with quantum dots (QDs) using organosilane chemistry in a one‐step preparation. Ligand exchange takes place between the thiolated organosilane and acid‐capped QDs, making the doping easy. Ag+ adsorption by the silica microspheres causes the decrease of fluorescence intensity of the QDs. The detection limit for Ag+ is found to be 10 μmol/L. The abundance of thiol groups on the surface of the microspheres could effectively remove Ag+ through strong interaction. When microspheres with a diameter of 1.1 μm are used as the adsorbents, the adsorption capacity for Ag+ reached 102 mg/g. This excellent adsorption ability is due to the abundance of thiol groups that act as the active sites, facilitating the adsorption of the massive metal ions on the surface of the microspheres. Furthermore, the adsorption isotherm data follows the Freundlich model. The structure and content of the silica microspheres were investigated by scanning and high‐resolution transmission electron microscopy, energy dispersive X‐ray spectroscopy, and Raman analysis, and the fluorescence properties were characterized by fluorescence microscopy.

Selective Adsorption of Ag⁺ on a New Cyanuric-Thiosemicarbazide Chelating Resin with High Capacity from Acid Solutions.

A new cyanuric-thiosemicarbazid (TSC-CC) chelating resin was synthesized and employed to selectively adsorb Ag+ from acid solutions. The effects of acid concentration, initial concentration of Ag+, contact time and coexisting ions were investigated. The optimal acid concentration was 0.5 mol/L. The adsorption capacity of Ag+ reached 872.63 mg/g at acid concentration of 0.5 mol/L. The adsorption isotherm was fitted well with the Langmuir isotherm model and the kinetic data preferably followed the pseudo-second order model. The chelating resin showed a good selectivity for the Ag+ adsorption from acid solutions. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy/energy dispersive spectrometer (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) were used to study the adsorption mechanism. The chelating and ionic interaction was mainly adsorption mechanism. The adsorbent presents a great potential in selective recovery Ag+ from acid solutions due to the advantage of high adsorption capacity and adapting strongly acidic condition. The recyclability indicated that the (TSC-CC) resin had a good stability and can be recycled as a promising agent for removal of Ag+.

Acyl thioacetamide-group chelated nanofiber to adsorb silver ions from aqueous systems

The acyl thioacetamide-group chelated nanofiber was prepared from polyacrylonitrile(PAN) fiber with thioacetamide as vulcanization agent by an electrospinning process combined with chemical modification. It was found that the chelated nanofiber displays a high adsorption capacity and adsorption selectivity for Ag(I) ions from aqueous systems. The adsorption capacity of Ag(I) ions on chelated nanofiber increases with the increase of adsorption time. Kinetics of the Ag(I) ions adsorption was found to follow pseudo-second-order rate equation. Based on the characterization results, a possible mechanism of Ag(I) ions adsorbed on the acyl thioacetamide-group chelated nanofiber was proposed. The chelated nanofiber could not only chelate to Ag(I) ions but also reduce them. This study provides a promising nanofiber material for removing heavy metal ions.

Adsorption of Ag+ by persimmon tannins immobilized on collagen fiber

In the present work, a novel adsorbent to effectively adsorb Ag+ from an aqueous solution has been prepared by immobilizing persimmon tannin (PT) on collagen fiber. The adsorption capacity of Ag+ on the immobilized PT were evaluated under various treatment conditions, including the initial solution pH, solid–liquid ratio, temperature, and initial concentration of Ag+. The results showed that the effect of initial solution pH, solid–liquid ratio, and initial concentration of Ag+ on the adsorption capacity were remarkable, while the influence of temperature was insignificant. The adsorption capacity reached 1947 mg/g at 303 K and pH 7.0 when the initial concentration of Ag+ was 800 mg/L and solid–liquid ratio was 0.4. Adsorption equilibrium isotherms of Ag+ on the surface of the adsorbent fibers were studied using Freundlich and Langmuir isotherms. The experimental data fitted best to the Freundlich models. Also, the immobilized PT before and after adsorption of Ag+ was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction, and scanning electron microscopy. All these results indicated that the immobilized PT adsorbed efficiently and could be used as a low-cost alternative for the adsorption of Ag+ in wastewater treatment.

Sorption of Ag&lt;sup&gt;+&lt;/sup&gt;, Cu&lt;sup&gt;2&lt;/sup&gt;&lt;sup&gt;+&lt;/sup&gt; on Thiol-Functionalized Poly (Acrylic Acid)/SiO&lt;sub&gt;2&lt;/sub&gt; Composite Nanofiber Membranes

Thiol-functionalized poly (acrylic acid)/SiO2(PAA/SiO2) composite nanofiber membranes have been fabricated by a sol-gel electrospinning method and their adsorption capacity for Ag+, Cu2+was investigated. Results showed the PAA/SiO2fibers had a diameter between 300 nm-700 nm. FTIR results demonstrated that the mercapto groups have been introduced into the silica skeleton. The adsorption of Ag+, Cu2+on the membranes fit the Redlich-Peterson isotherm model best. The equilibrium adsorption capacity of Ag+(575.64 mg/g) on PAA/SiO2nanofiber membranes is higher than Cu2+(331.52 mg/g). The desorption rate reached 98% in 30 min. The removal rate of Ag+, Cu2+still maintained above 75% after six regeneration cycles. Adsorption kinetics of Ag+, Cu2+followed a pseudo-second-order model.

Adsorption Performance for Ag(І) of an Ethoxycarbonyl Thiourea Chelating Resin

Effects of initial concentration of Ag(І), concentration of HNO3, contact time and adsorption temperature on adsorption capacities of a novel polystyrene modified ethoxycarbonyl thiourea resin were investigated, and the maximum adsorption capacity of Ag(І) reached 4.11 mmol·g-1. The adsorption kinetics was well fitted Boyd’s diffusion equation of liq·uid film, so the adsorption was controlled by liquid film diffusion. The experimental date fitted Langmuir equation, and the correlation coefficient was close to 1. The positive value of adsorption enthalpy ΔH is indicative of an endothermic process. FT-IR characteristic peaks of ethoxycarbonyl and thiourea groups changed obviously fore-and-aft adsorption, which means that the corresponding functional groups coordinate with Ag during the adsorption process.

A Novel Chelating Resin, Polystyrene-Supported Glucosamine: Preparation and Adsorption Properties for Ag(Ⅰ)

A novel chelating resin, crosslinking polystyrene-supported glucosamine (PS-GA), was prepared and its static adsorption properties for Ag(Ⅰ) were studied. The results indicated that this resin had excellent adsorption capacity for Ag(Ⅰ). The adsorption dynamics indicated that adsorption was controlled by the liquid film diffusion and the apparent activation energy Ea was 11.83 kJ/mol. Both Langmuir model and Freundlich model could describe the adsorption isothermal process of Ag(Ⅰ), and ∆G, ∆H, ∆S values were calculated. Increasing the temperature was beneficial to adsorption. The chelating resin can be easily regenerated by 2% thiourea in 0.1 mol/L HNO3 with higher effectiveness. Five adsorption–desorption cycles demonstrated that this resin was suitable for repeated use without considerable change in adsorption capacity.

Effect of trace Ag+ adsorption on degradation of organic dye wastes

Abstract By the introduction of Ag+, the molecular imprinting technology and photocatalysis technology were associated with each other and the Ag+-imprinted biosorbent (Ag-IB) was prepared. Ag-IB could first adsorb Ag+ and then degraded Methyl Orange (MO). Firstly the influences of the ionic strength and pH value in solution on adsorption capacity for Ag+ were studied, and then the effects of Ag+ adsorption capacity on degradability for MO were investigated. The maximal degradation ratio of MO reached over 93% at Ag+ adsorption capacity of 78.0 mg/g after 5.0 h. In contrast to MO, Methylene Blue (MB) and Sunset Yellow (SY) were studied and the degradation ratios could be about 70% and 98% at Ag+ adsorption capacity of 36.9 mg/g, respectively. And XPS analysis showed that Ag+ was reduced to Ag on Ag-IB surface. Furthermore, the mechanism for photocatalytic degradation of MO dye was primarily researched.