A photocatalytic mortar prepared by tourmaline and TiO2 treated recycled aggregates and its air-purifying performance

Chen, Xuefei; Jiao, Chujie

doi:10.1016/j.cscm.2022.e01073

Cited by 5 publications

(5 citation statements)

References 41 publications

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“…A visual verification of the effectiveness of Equation ( 18) is available in Figure 11. Figure 11a shows the real data and the data predicted by Equation (18). It is observed that some real data are located in the upper area of the respond trend surface; whilst some other real data are beneath the respond trend surface.…”

Section: Respond Surface Methodology (Rsm)mentioning

confidence: 99%

“…On the contrary, the combined use of RFA and NT in the form of a composite photocatalyst (NT@RFA) is a step further towards maximizing the value of both NT and the carrier of RFA. It was reported that an increased nitrogen oxides (NOx) removal was realized when the NT was loaded onto the porous carrier [15][16][17][18]. The alkaline medium was also proven to coordinate with photocatalysts in boosting the degradation of acidic pollutant gases such as sulfur dioxide (SO2) [19].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation and Modeling of the Sulfur Dioxide Abatement of Photocatalytic Mortar Containing Construction Wastes Pre-Treated by Nano TiO2

Chen

Jiao

2022

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A photocatalytic mortar containing recycled clay brick powder (RCBP), recycled fine aggregate (RFA), recycled glass (RG), and nanoscale titanium dioxide (NT) was fabricated to degrade low-concentration sulfur dioxide. Instead of intermixing or dip-coating, NT was firstly loaded onto the surface of carriers (RFA and RG) using a soaking method to prepare composite photocatalysts (CPs) denoted as NT@RFA and NT@RG. The prepared CPs can both take full advantage of the intrinsic characteristics of construction wastes, namely, the high porosity and alkalinity of RFA and the light-transmitting property of RG, and can significantly reduce the cost of using NT. RG in high dosage potentially triggers alkali–silica reaction (ASR) in cement-based materials, which affects the durability of the prepared mortar. RCBP, another typical construction waste sourced from crushed clay bricks, was proven to be a pozzolan similar to grade II fly ash. The combined use of RCBP and RG in photocatalytic mortar is expected to simultaneously improve durable performance and further raise the upper content limit of construction wastes. Results exhibit that 70% cement plus 30% RCBP as cementitious material can sufficiently control ASR to an acceptable level. The filling effect and the pozzolanic reaction caused by RCBP result in a decline in porosity and lessened alkalinity, which decreases sulfur dioxide removal. The paper uses both response surface methodology (RSM) and an artificial neural network (ANN) to model photocatalytic efficiency with various initial concentrations and flow rates and finds the ANN to have a better fitting and prediction performance.

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Section: Respond Surface Methodology (Rsm)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Modeling of the Sulfur Dioxide Abatement of Photocatalytic Mortar Containing Construction Wastes Pre-Treated by Nano TiO2

Chen

Jiao

2022

Catalysts

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“…Alternatively, they could investigate herbicides for non-hazardous treatment, with the goal of achieving simultaneous energy production and material generation via photocatalytic hydrogen production, including a synergistic conversion of organic contaminants. [155][156][157][158] In their study, Chiu et al 159 employed benzenethiol as a sacricial agent for the purpose of photocatalytic hydrogen production. They observed that the most favourable conversion rate of 75.9% was achieved in the UiO-66 group.…”

Section: Ceomentioning

confidence: 99%

Section: An Integrated Approach Of Converting Micropollutant Into Fea...mentioning

confidence: 99%

Advanced photocatalytic materials based degradation of micropollutants and their use in hydrogen production – a review

Balu,

Ganapathy,

Arya

et al. 2024

RSC Adv.

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“…Experimental results revealed that TP increased the compressive strength when the content was not higher than 15 wt%. Moreover, 15 wt% TP combined with 100 wt% NT@RCBS was optimal in producing 950 ions/(s•cc) of negative ions, equivalent to that defined by the World Health Organization (WHO) in clean air [19].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical Behaviors of Sustainable Green Reactive Powder Concrete Produced Using Ferrochrome Slag and Waste Fiber

Atlı,

Ipek

2024

Sustainability

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Reactive powder concrete (RPC) is a new generation concrete with high strength, used in special structures, and its use is increasing day by day. In this study, instead of using high-strength aggregates typically used in RPC, wastes released in ferrochrome production were used. In addition, the possibility of using fibers obtained from end-of-life automobile tires (ELT), instead of the micro steel fibers typically used in RPC, was investigated. Thus, sustainable green reactive powder concrete (GRPC), the material which is obtained from waste materials except the binder and chemical additive, has been developed. As ferrochrome wastes, olivine, serpentine, rum, slag, and pure waste were used as powder and aggregate in GRPC. Firstly, in GRPC without fiber, the physical and mechanical properties of ferrochrome wastes were examined by using different ratios. Then, the optimum mixture was selected, and different ratios of industrial steel and ELT fiber were added to this mixture. As a result, the compressive strength of GRPC using olivine and pure waste (ferrochrome slag) is close to the reference RPC. However, it is 28% more economical. The flexural strength of the samples with a 4% addition of industrial or ELT fiber increased by 182% and 213%, respectively, compared to the reference sample without fiber. With the use of 4% ELT fiber (by volume) in GRPC, the flexural strength increased by 11% compared to the use of industrial steel fiber. In terms of cost, with the use of ferrochrome waste and ELT fiber, GRPC was 48% more economical. When examined in terms of the flexural and compressive unit strength cost, GRPC was approximately 41% more economical. As a result of this study, high-performance concrete with high mechanical properties that is economical, sustainable, and environmentally friendly has been produced by evaluating the use of waste materials.

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A photocatalytic mortar prepared by tourmaline and TiO2 treated recycled aggregates and its air-purifying performance

Cited by 5 publications

References 41 publications

Experimental Investigation and Modeling of the Sulfur Dioxide Abatement of Photocatalytic Mortar Containing Construction Wastes Pre-Treated by Nano TiO2

Experimental Investigation and Modeling of the Sulfur Dioxide Abatement of Photocatalytic Mortar Containing Construction Wastes Pre-Treated by Nano TiO2

Advanced photocatalytic materials based degradation of micropollutants and their use in hydrogen production – a review

Investigation of the Mechanical Behaviors of Sustainable Green Reactive Powder Concrete Produced Using Ferrochrome Slag and Waste Fiber

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