Amyloid-like aggregates of bovine serum albumin for extraction of gold from ores and electronic waste

Yang, Qingmin; Cao, Jun; Yang, Fei; Chen, Mengmeng; Qin, Rongrong; Chen, Lixin; Yang, Peng

doi:10.1016/j.cej.2021.129066

Cited by 38 publications

(25 citation statements)

References 75 publications

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“…Additionally, taking into account the excellent biosafety of PTFs, an antibacterial coating can be used to modify everyday merchandise and biomedical implants/devices. , In addition to lysozyme, the near balance of the distribution of positively and negatively charged residues on the surface of BSA-based PTFs provides stronger hydration via ionic solvation, which can resist nonspecific protein adsorption, offering BSA-based PTFs with excellent antifouling ability . Therefore, such coatings showed excellent resistance to the nonspecific adsorption of biological liquid mixtures, proteins, and extracellular matrix components and even to cells, platelets, and fungi, effectively inhibiting the formation of biofilms (Figure e). , Moreover, the sulfhydryl, amino, imidazolyl, indolyl, and phenolic hydroxyl groups on the surfaces of PTFs can efficiently interact with precious , and toxic , metal ions, and the corresponding gold adsorption capacity was ∼2100 times higher than that of commonly used industrial adsorbents . Several metal–protein hybrid films were further prepared by replacing TCEP with metal ions, resulting in the welding of metals at room temperature. , For example, by simply mixing a protein, silver ammonium ions, and glucose, a silver–protein hybrid film was obtained (98% silver) .…”

Section: Functional Design Of Ptfsmentioning

confidence: 99%

“…29 Therefore, such coatings showed excellent resistance to the nonspecific adsorption of biological liquid mixtures, proteins, and extracellular matrix components and even to cells, platelets, and fungi, effectively inhibiting the formation of biofilms (Figure 7e). 29,52 Moreover, the sulfhydryl, amino, imidazolyl, indolyl, and phenolic hydroxyl groups on the surfaces of PTFs can efficiently interact with precious 53,54 and toxic 55,56 metal ions, and the corresponding gold adsorption capacity was ∼2100 times higher than that of commonly used industrial adsorbents. 54 Several metal−protein hybrid films were further prepared by replacing TCEP with metal ions, resulting in the welding of metals at room temperature.…”

Section: Functions Derived From the Regulation Of The Chemical Struct...mentioning

confidence: 99%

“…29,52 Moreover, the sulfhydryl, amino, imidazolyl, indolyl, and phenolic hydroxyl groups on the surfaces of PTFs can efficiently interact with precious 53,54 and toxic 55,56 metal ions, and the corresponding gold adsorption capacity was ∼2100 times higher than that of commonly used industrial adsorbents. 54 Several metal−protein hybrid films were further prepared by replacing TCEP with metal ions, resulting in the welding of metals at room temperature. 57,58 For example, by simply mixing a protein, silver ammonium ions, and glucose, a silver−protein hybrid film was obtained (98% silver).…”

Section: Functions Derived From the Regulation Of The Chemical Struct...mentioning

confidence: 99%

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Controlling the Structure and Function of Protein Thin Films through Amyloid-like Aggregation

et al. 2021

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Metrics & MoreArticle Recommendations CONSPECTUS: Protein thin films (PTFs) with tunable structure and function can offer multiple opportunities in various fields such as surface modification, biomaterials, packaging, optics, electronics, separation, energy, and environmental science. Although nature may offer a variety of examples of high-level control of structure and function, e.g., the S layer of cells, synthetic alternatives for large-area protein-based thin films with fine control over both biological function and material structure are a key challenge, especially when aiming for facile, low-cost, green, and large-scale preparation as well as a further extension of function, such as the encapsulation and release of functional building blocks. Therefore, regarding the structure and function of PTFs, we will first briefly comment on the problems associated with PTF fabrication, and then, regarding the basis of our long-term research on protein-based thin films, we will summarize the new strategies that we have developed in recent years to explore and control the structure and function of PTFs for frontier research and practical applications.Inspired by naturally occurring protein amyloid fibrillization, we proposed the amyloid-like protein aggregation strategy to assemble proteins into supramolecular 2D films with extremely large sizes and enduring interfacial adhesion stability. This approach opened a new window for PTF fabrication in which the spontaneous interfacial 2D aggregation of protein oligomers instead of traditional 1D protofibril elongation directs the assembly of proteins. As a result, the film morphology, thickness, porosity, and function can be tailored by simply tuning the interfacial aggregation pathways.We further modified amyloid-like protein aggregation to develop chemoselective reaction-induced protein aggregation (CRIPA). It is well known that chemoselective reactions have been employed for protein modification. However, the application of such reactions in PTF fabrication has been overlooked. We initiated this new strategy by employing thiol−disulfide exchange reactions. These reactions are chemoselective toward proteins containing specific disulfide bonds with high redox potentials, resulting in amyloid-like aggregation and thin film formation. Functional proteins with immunity to such reactions can be encapsulated in thin films and released on demand without a loss of activity, opening a new avenue for the development of functional PTFs and coatings. Finally, the resultant amyloid-inspired PTFs, as a new type of biomimetic materials, provide a good platform for integration with various biomedical functions. Here, the creation of bioactive surfaces on virtually arbitrary substrates by amyloid-like PTFs will be discussed, highlighting antimicrobial, antifouling, molecular separation, and interfacial biomineralization activities that exceed those of their native protein precursors and synthetic alternatives.

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Section: Functional Design Of Ptfsmentioning

confidence: 99%

Section: Functions Derived From the Regulation Of The Chemical Struct...mentioning

confidence: 99%

Section: Functions Derived From the Regulation Of The Chemical Struct...mentioning

confidence: 99%

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Controlling the Structure and Function of Protein Thin Films through Amyloid-like Aggregation

et al. 2021

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“…The gold extraction behaviour of these materials is mainly contributed by the immobilization of gold ions with the intrinsic porosity and the chemical reduction of the gold ion by the added functional groups. The other set of gold adsorbents, for example, two-dimensional molybdenum disulphide [16][17][18] , amyloid 19,20 , cyclodextrin 21 and diamide 22 , instead of relying on the porosity of the adsorbents, their efficient gold extraction is accounted to the chemical reduction of gold ions to Au 0 by photoreduction or the functional groups, and precipitation of gold ions with the adsorbents.…”

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confidence: 99%

Highly efficient and selective extraction of gold by reduced graphene oxide

Zhu

Sun

et al. 2022

Nat Commun

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Materials capable of extracting gold from complex sources, especially electronic waste (e-waste), are needed for gold resource sustainability and effective e-waste recycling. However, it remains challenging to achieve high extraction capacity and precise selectivity if only a trace amount of gold is present along with other metallic elements . Here we report an approach based on reduced graphene oxide (rGO) which provides an ultrahigh capacity and selective extraction of gold ions present in ppm concentrations (>1000 mg of gold per gram of rGO at 1 ppm). The excellent gold extraction performance is accounted to the graphene areas and oxidized regions of rGO. The graphene areas spontaneously reduce gold ions to metallic gold, and the oxidized regions allow good dispersibility of the rGO material so that efficient adsorption and reduction of gold ions at the graphene areas can be realized. By controlling the protonation of the oxidized regions of rGO, gold can be extracted exclusively, without contamination by the other 14 co-existing elements typically present in e-waste. These findings are further exploited to demonstrate recycling gold from real-world e-waste with good scalability and economic viability, as exemplified by using rGO membranes in a continuous flow-through process.

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“… 17 , 18 However, the high cost of human-derived protein isolation and extraction makes it challenging to further development. 19 Organic macromolecular polymers are also commonly used as drug carriers and are biodegradable in organisms. However, some polymers have significant cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Construction Of High Loading Natural Active Substances Nanoplatform and Application in Synergistic Tumor Therapy

Liu¹,

Jiapaer²,

Meng³

et al. 2022

IJN

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Background Natural bioactive substances have been widely studied for their superior anti-tumor activity and low toxicity. However, natural bioactive substances suffer from poor water-solubility and poor stability in the physiological environment. Therefore, to overcome the drawbacks of natural bioactive substances in tumor therapy, there is an urgent need for an ideal nanocarrier to achieve high bioactive substance loading with low toxicity. Materials and Methods Face-centered cubic hollow mesoporous Prussian Blue (HMPB) NPs were prepared by stepwise hydrothermal method. Among them, PVP served as a protective agent and HCl served as an etching agent. Firstly, MPB NPs were obtained by 0.01 M HCl etching. Then, the highly uniform dispersed HMPB NPs were obtained by further etching with 1 M HCl. Results In this work, we report a pH-responsive therapeutic nanoplatform based on HMPB NPs. Surprisingly, as-prepared HMPB NPs with ultra-high bioactive substances loading capacity of 329 μg mg −1 owing to the large surface area (131.67 m 2 g −1 ) and wide internal pore size distribution (1.8–96.2 nm). Moreover, with the outstanding photothermal conversion efficiency of HMPB NPs (30.13%), natural bioactive substances were released in the tumor microenvironment (TME). HMPB@PC B2 achieved excellent synergistic therapeutic effects of photothermal therapy (PTT) and chemotherapy (CT) in vivo and in vitro without causing any extraneous side effects. Conclusion A biocompatible HMPB@PC B2 nanoplatform was constructed by simple physical adsorption. The in vitro and in vivo experiment results demonstrated that the synergy of PTT/CT provided excellent therapeutic efficiency for cervical cancer without toxicity. Altogether, as-designed nanomedicines based on natural bioactive substances may be provide a promising strategy for cancer therapy.

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Amyloid-like aggregates of bovine serum albumin for extraction of gold from ores and electronic waste

Cited by 38 publications

References 75 publications

Controlling the Structure and Function of Protein Thin Films through Amyloid-like Aggregation

Controlling the Structure and Function of Protein Thin Films through Amyloid-like Aggregation

Highly efficient and selective extraction of gold by reduced graphene oxide

Construction Of High Loading Natural Active Substances Nanoplatform and Application in Synergistic Tumor Therapy

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