Carbon-based nanomaterials: Characteristics, dimensions, advances and challenges in enhancing photocatalytic hydrogen production

Ahmed, Shams Forruque; Kumar, P. Senthil; Ahmed, Bushra; Mehnaz, Tabassum; Shafiullah, GM; Nguyen, Van Nhanh; Duong, Xuan Quang; Mofijur, M.; Badruddin, Irfan Anjum; Kamangar, Sarfaraz

doi:10.1016/j.ijhydene.2023.03.185

Cited by 18 publications

(3 citation statements)

References 125 publications

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“…Moreover, it is necessary to develop tests in order to detect probable degradation products that are produced during the treatment process using these approaches. Continued research is essential to create economical and reliable methods for assessing the intricate characteristics of nanoparticles in wastewater treatment (Babu et al, 2021;Elsaid et al, 2023;Ahmed et al, 2024).…”

Section: Navigating the Nano-revolution: Environmental Impacts And Ch...mentioning

confidence: 99%

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Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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Engineered nanomaterials have emerged as a promising technology for water treatment, particularly for removing heavy metals. Their unique physicochemical properties enable them to adsorb large quantities of metals even at low concentrations. This review explores the efficacy of various nanomaterials, including zeolites, polymers, chitosan, metal oxides, and metals, in removing heavy metals from water under different conditions. Functionalization of nanomaterials is a strategy to enhance their separation, stability, and adsorption capacity. Experimental parameters such as pH, adsorbent dosage, temperature, contact time, and ionic strength significantly influence the adsorption process. In comparison, engineered nanomaterials show promise for heavy metal remediation, but several challenges exist, including aggregation, stability, mechanical strength, long-term performance, and scalability. Furthermore, the potential environmental and health impacts of nanomaterials require careful consideration. Future research should focus on addressing these challenges and developing sustainable nanomaterial-based remediation strategies. This will involve interdisciplinary collaboration, adherence to green chemistry principles, and comprehensive risk assessments to ensure the safe and effective deployment of nanomaterials in heavy metal remediation at both lab and large-scale levels.

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Section: Navigating the Nano-revolution: Environmental Impacts And Ch...mentioning

confidence: 99%

“…• Limited Understanding of Long-Term Impacts: The longterm fate and behavior of nanomaterials in the (Ahmed et al, 2024;Babu et al, 2021;Elsaid et al, 2023;Roostaee et al, 2022;Yaqoob et al, 2020).…”

Section: Challenges and Environmental Concernsmentioning

confidence: 99%

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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“…Inorganic semiconducting nanostructured materials have been extensively studied for decades as heterogeneous photocatalysts for solar energy harvesting. − Among these, carbon-based materials, − metal–organic frameworks, − metal oxides, ,− chalcogenides, − chalcopyrites, − kesterites, − perovskites, − and oxyhalides − remained in the forefront. Developments of such new materials, along with studies of their crystal structures and optical bandgaps, are also continuing, in order to meet the current challenges of harvesting energy while providing environmental remedies.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

Shyamal,

Pradhan

2023

ACS Energy Lett.

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Nanocrystals of all-inorganic metal chalcohalides having a combination of chalcogen and halogen anions with appropriate crystal structure and bandgap can be ideal semiconductors in comparison to the well-established multicomponent family of nanostructures. These materials are one of the overlooked semiconductors which could play a paramount role in photocatalysis due to their stability, low-dimensional (1D) structure, and suitable bandgaps with efficient light-responsive nature. Emphasizing these materials, in this Review, recent developments in the design and application of different chalcohalide nanostructures are reported. The initial part is focused on the syntheses and crystal structures of reported chalcohalide materials, followed by an overview of their photocatalytic applications in different aspects. Finally, the successes and challenges associated with the future progress using these materials are discussed. This Review will provide an extended understanding and offer a preferred direction for the innovative design of these materials for environmental and especially energy-based applications.

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Nitrogen‐Rich Carbon Nanodot‐Sensitized TiO₂ with MWCNT Composites for Efficient Visible Light Photocatalysis

Ekanayake,

Mai,

Mahasivam

et al. 2024

Adv Materials Inter

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TiO2‐based composite photocatalysts are currently being explored to address concerns intrinsic to TiO2, specifically high charge carrier recombination and UV light activation. Among various materials utilized for composite formation, carbon nanomaterials stand out due to their high electron conductivity, charge storage, photosensitization, and surface properties. However, high carbon content in composites has been shown to reduce performance with potential toxicity concerns. To harness the diverse properties of carbon nanomaterials in a single composite while optimizing the carbon content below 1% by weight, multi‐walled carbon nanotubes (MWCNT)/TiO2 sensitized by carbon nanodots (CND) are synthesized. The heterojunction formed between MWCNTs and TiO2 in the binary composite reduced the charge carrier recombination rate compared to TiO2. The addition of CNDs to MWCNT/TiO2 induced visible light absorbance of the resulting ternary composite, due to the forbidden electron transitions undergone in CND aggregates. CND/MWCNT/TiO2 exhibited a fivefold and 1.6‐fold increase in photocatalytic degradation of acid orange 7 and tetracycline under visible light compared to TiO2. This enhancement is attributed to the photosensitizing property of CNDs working in synergy with the charge storage ability of MWCNTs. A plausible charge transfer pathway for the activity of CND/MWCNT/TiO2 is proposed.

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Carbon-based nanomaterials: Characteristics, dimensions, advances and challenges in enhancing photocatalytic hydrogen production

Cited by 18 publications

References 125 publications

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

Nitrogen‐Rich Carbon Nanodot‐Sensitized TiO₂ with MWCNT Composites for Efficient Visible Light Photocatalysis

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Carbon-based nanomaterials: Characteristics, dimensions, advances and challenges in enhancing photocatalytic hydrogen production

Cited by 18 publications

References 125 publications

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Nanostructured Metal Chalcohalide Photocatalysts: Crystal Structures, Synthesis, and Applications

Nitrogen‐Rich Carbon Nanodot‐Sensitized TiO2 with MWCNT Composites for Efficient Visible Light Photocatalysis

Contact Info

Product

Resources

About

Nitrogen‐Rich Carbon Nanodot‐Sensitized TiO₂ with MWCNT Composites for Efficient Visible Light Photocatalysis