Colorimetric aminotriazole assay based on catalase deactivation-dependent longitudinal etching of gold nanorods

Li, Younan; Luo, Guoyan; Qing, Zhihe; Li, Xiaoxuan; Zou, Zhen; Yang, Ronghua

doi:10.1007/s00604-019-3677-1

Cited by 12 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I 3 – is generated by adding the iodine element or strong acid and hydrogen peroxide to I – solution (eqs and ). A coexistence system of I – –I 3 – is formed to dissolve Au and Ag, and the dissolution process is shown in eq . − Many of the advantages of traditional iodination are also retained in the photocatalytic iodination method. Different from traditional halogenation methods, we described herein only needs to add halide ions and a non-toxic photocatalyst to the aqueous solution without additional strong oxidants or halogen elements.…”

Section: Results and Discussionmentioning

confidence: 99%

Aqueous Photocatalytic Recycling of Gold and Palladium from Waste Electronics and Catalysts

et al. 2022

View full text Add to dashboard Cite

Gold and palladium are the most widely used precious metal materials in the field of electronic devices and industrial catalysis. How to realize the green recycling of gold and palladium is important and challenging. In this work, we found that gold and palladium in wastes, such as electronic devices and industrial catalysts, can be completely dissolved and recycled by photocatalysis. Gold and palladium are oxidized to the ionic state in water, which does not involve strong acids, strong alkalis, toxic cyanides, or an organic medium. More interestingly, the dissolution of gold and palladium in different halogen aqueous solutions has special selectivity, which depends on the coordination stability constants between gold and palladium with halide ions. Therefore, gold and palladium can be selectively dissolved in iodine ion solution and bromine ion solution, respectively, then gold and palladium can be obtained by a one-step reduction. This work opens up a new direction for optimizing the photocatalytic dissolution technology and promoting the green recycling of precious metals.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Aqueous Photocatalytic Recycling of Gold and Palladium from Waste Electronics and Catalysts

et al. 2022

View full text Add to dashboard Cite

show abstract

“…With the development of nanotechnology, nanomaterial-based enzyme mimics (nanozyme) are widely used as alternatives to natural enzymes because of their attractive merits of outstanding tolerance in harsh environments, easy large-scale production, and low cost. The reported enzyme-like activities include the peroxidase-like activity [ 23 ], superoxide dismutase-like activity [ 7 ], catalase-like activity [ 17 ], and so on. The unique characteristics of nanomaterials and the synergistic effect of enzyme-like activities, making nanozymes potential applications in wide fields including biosensing [ 34 ], food industry, pharmaceutical processes, and environmental treatment [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of Co-doped MoS2 nanosheet for enhanced mimicking peroxidase activity

Zhang

Tang

et al. 2022

J Mater Sci

View full text Add to dashboard Cite

To enhance the catalytic activity of two-dimensional layered materials as versatile materials, the modification of transition metal dichalcogenide nanosheets such as MoS 2 by doping with heteroatoms has drawn great interests. However, few reports are available on the study of the enzyme-like activity of doped MoS 2 . In this study, a facile in situ hydrothermal method for the preparation of various ultrathin transition metals (Fe, Cu, Co, Mn, and Ni) doped MoS 2 nanosheets has been reported. Through the density functional theory (DFT) and steady-state kinetic analysis, the Co-doped MoS 2 nanosheets exhibited the highest peroxidase-like catalytic activity among them. Furthermore, a typical colorimetric assay for H 2 O 2 was presented based on the catalytic oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue product (oxTMB) by Co-MoS 2 . The proposed colorimetric method showed excellent tolerance under extreme conditions and a broad linear range from 0.0005 to 25 mM for H 2 O 2 determination. Concerning the practical application, in situ detection of H 2 O 2 generated from SiHa cells was also fulfilled, fully confirming the great practicability of the proposed method in biosensing fields. Supplementary Information The online version contains supplementary material available at 10.1007/s10853-022-07201-z.

show abstract

“…The rapid advance of nanoscience and nanotechnology makes it possible to design nanomaterials-assisted biosensors with improved detection performance for pathogenic bacteria and virus ( Li et al, 2019b ; Qing et al, 2020a ; Qing et al, 2020c ; Sanvicens et al, 2009 ). Because the small size, unique properties (e.g., fluorescence quenching and electroconductivity) and good biocompatibility of graphene are just in keeping with the high-efficiency and diversity required for biosensors, graphene-based biosensors have been intensely developed in the past decades ( Zhu et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Graphene biosensors for bacterial and viral pathogens

Jiang

Feng

et al. 2020

Biosensors and Bioelectronics

Self Cite

134

View full text Add to dashboard Cite

: The infection and spread of pathogens (e.g., COVID-19) pose an enormous threat to the safety of human beings and animals all over the world. The rapid and accurate monitoring and determination of pathogens are of great significance to clinical diagnosis, food safety and environmental evaluation. In recent years, with the evolution of nanotechnology, nano-sized graphene and graphene derivatives have been frequently introduced into the construction of biosensors due to their unique physicochemical properties and biocompatibility. The combination of biomolecules with specific recognition capabilities and graphene materials provides a promising strategy to construct more stable and sensitive biosensors for the detection of pathogens. This review tracks the development of graphene biosensors for the detection of bacterial and viral pathogens, mainly including the preparation of graphene biosensors and their working mechanism. The challenges involved in this field have been discussed, and the perspective for further development has been put forward, aiming to promote the development of pathogens sensing and the contribution to epidemic prevention.

show abstract

Colorimetric aminotriazole assay based on catalase deactivation-dependent longitudinal etching of gold nanorods

Cited by 12 publications

References 35 publications

Aqueous Photocatalytic Recycling of Gold and Palladium from Waste Electronics and Catalysts

Aqueous Photocatalytic Recycling of Gold and Palladium from Waste Electronics and Catalysts

In situ synthesis of Co-doped MoS2 nanosheet for enhanced mimicking peroxidase activity

Graphene biosensors for bacterial and viral pathogens

Contact Info

Product

Resources

About