Is nano ZrO<sub>2</sub> a better photocatalyst than nano TiO<sub>2</sub> for degradation of plastics?

Bandara, W. R. L. Nisansala; Silva, Rohini M. de; Silva, K.M. Nalin de; Dahanayake, Damayanthi; Gunasekara, Sunanda; Thanabalasingam, Kulatheepan

doi:10.1039/c7ra08324f

Cited by 48 publications

(20 citation statements)

References 42 publications

(42 reference statements)

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“…88,89 This strategy generally uses oxide semiconductor materials (TiO 2 , ZnO, ZrO 2 , etc.) [90][91][92][93][94] as photocatalysts for polyolefin decomposition, but their performances are always unsatisfactory. Thus, the urgent task in this field is the increase of activity.…”

Section: Photocatalysismentioning

confidence: 99%

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Chu

Yang

et al. 2022

SusMat

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The mass production of disposable polyolefin products has led to serious plastic pollution and an imbalance between manufacturing and recycling. Given these challenges, the chemical upcycling of waste polyolefins has attracted extensive attention due to its high efficiency and economic benefits. Herein, we review the development of polyolefin chemical upcycling in heterogeneous catalysis. The status quo of polyolefin recycling is first discussed. We then introduce the advanced strategies for chemical upcycling in the view of different value‐added products and discuss their challenges and prospects. Our in‐depth analysis centers on the catalytic mechanism and the design principle of heterogeneous catalysts. Finally, we outlook the promising directions to facilitate the degradation process via polymer and catalyst design and optimized catalytic engineering. Innovative strategies are expected to promote the chemical upcycling of polyolefins, bringing great promise for the sustainable development of society.

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Section: Photocatalysismentioning

confidence: 99%

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Chu

Yang

et al. 2022

SusMat

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“…Their findings show that 78% of PE degrades in 15 days of reaction. Bandara et al, (2017) reported the degradation of plastic over TiO 2 and ZrO 2 under sunlight. In this case, the degradation of PE and PP were studied in terms of its morphology and changes in carbonyl index.…”

Section: Journal Of Sustainability Science and Management Volume 15 Nmentioning

confidence: 99%

“…The SEM micrograph of PP plastic after being treated for five times as indicated in Figure 8. The damage of the PP surface increases with increased exposure to light source and longer reaction time (Bandara et al, 2017).…”

Section: The Influence Of Cyclic Thermo-photocatalytic Treatment On Pmentioning

confidence: 99%

“…Unfortunately, the plastic wastes generated from household materials and industrial sectors steadily increase by 3.9% per year while almost 12,000 million tons of the wastes have escaped from the waste management cycle and ended in the landfills or discarded into water bodies such as river, lake or ocean (Clean Malaysia, 2016;Valavanidis, 2016). This is undesirable since plastic waste does not decompose or degrade naturally, so they could last for several decades in our valuable water resources if no proper handling is carried out (Bandara et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Thermo-Photocatalytic Process Using Zinc Oxide on Degradation of Macro/Micro-Plastic in Aqueous Environment

Razali¹,

Abdullah²,

Zikir³

2020

J. Sustain. Sci. Manage.

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More than 320 million tons of plastics are produced annually, and the rate of plastic waste generation steadily increases by 3.9% per year. Introduction of plastic waste into water bodies may lead to many adverse environmental impacts as the plastic debris is very stable and generally requires a longer time to degrade. Over a period of time, bulk plastic debris will slowly degrade into small fragments known as macroplastics (particles size >5mm) and microplastics (particles size <5mm). Accumulation of this newly emerging class of pollutants potentially decreases the efficiency of the existing water treatment system. Therefore, improvement on the existing water treatment technique is required. This study aimed at investigating the effect of using the UV-assisted thermo-photocatalytic reaction on the degradation of polypropylene (PP) macro- and microplastics in an aqueous environment for 6 hours. ZnO nanoparticles (<50 nm) were employed as the photocatalyst. 23 Full Factorial design was carried out in order to identify the correlation between the reaction temperature (35-50 o C), size of PP plastic (25-100 mm2 ) and the catalyst dosage (1–3 g/L) factors and their influences on the weight loss of macro/micro-plastics. Maximum plastic weight loss of 7.8 wt% was achieved at 50°C, 1 g/L ZnO and 25 mm2 of PP plastic. The interaction between temperature and size must be taken into consideration.

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“…Accordingly, there is a need for an environmental purification technology that has little or no maintenance cost. A representative technology that meets this requirement is the application of photocatalysts [3][4][5][6][7][8]. Photocatalysts show tremendous potentials for degradation of toxic contaminants and dyes, and they are recognized as one of the most efficient means to solve the issue of environmental pollution [9].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Coated Zinc Oxide Core–Shell Nanofibers for Enhanced Photocatalytic Performance and Durability

Tiwari

Kim

2020

Coatings

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Recently, heterogeneous structured semiconductor photocatalysts have received significant interest in promoting global cleaning from the environmental pollution. Herein, we report the synthesis of graphene oxide (GO) wrapped zinc oxide (ZnO) core–shell nanofibers (ZnO@G CSNFs) by the simple core–shell electrospinning and subsequent annealing for efficient photocatalytic performance and stability. The heterostructured catalyst consisted of ZnO forming an enclosed core part while the GO was positioned on the surface, serving as a protective shell. Field emission scanning electron microscopy, high-resolution transmission electron microscopy and X-ray diffraction were used to confirm the synthesis of the desired product. Enhanced photocatalytic activity ZnO@G CSNFs was found compared to the corresponding ZnO NFs. Similarly, incorporation of GO into the ZnO nanofiber in a core–shell format significantly suppressed the photocorrosion. This study highlights the usefulness of using GO as the coating material to boost the photocatalytic performance of ZnO-based photocatalysts.

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Is nano ZrO₂ a better photocatalyst than nano TiO₂ for degradation of plastics?

Abstract: The environmental accumulation of plastic is a huge problem due to its low degradability.

Cited by 48 publications

References 42 publications

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Effect of Thermo-Photocatalytic Process Using Zinc Oxide on Degradation of Macro/Micro-Plastic in Aqueous Environment

Graphene Oxide Coated Zinc Oxide Core–Shell Nanofibers for Enhanced Photocatalytic Performance and Durability

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Is nano ZrO2 a better photocatalyst than nano TiO2 for degradation of plastics?

Abstract: The environmental accumulation of plastic is a huge problem due to its low degradability.

Cited by 48 publications

References 42 publications

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Sustainable chemical upcycling of waste polyolefins by heterogeneous catalysis

Effect of Thermo-Photocatalytic Process Using Zinc Oxide on Degradation of Macro/Micro-Plastic in Aqueous Environment

Graphene Oxide Coated Zinc Oxide Core–Shell Nanofibers for Enhanced Photocatalytic Performance and Durability

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Is nano ZrO₂ a better photocatalyst than nano TiO₂ for degradation of plastics?